Abstract:
A building insulation system for roofs and walls supported from the interior side of the building, which eliminates thermal bridges and bottom side ceiling fasteners to support the insulation system materials during the insulation and exterior sheeting process of the building construction. The insulation system creates an air gap space layer in roofs and in walls between the exterior wall and roof sheeting panels and the interior sheet material, which supports the insulation material layer. An air gap space enables active solar energy collection and its use to reduce the overall purchased energy for operation of the building. The insulation system preferably includes a support sheet material, a sheet material tensioning devices, an insulation material layer, insulation hanger retention devices, heat and air collection and distribution ducts, dampers, louvers, pipes, dehumidification and condensate collection devices used in the air gap layers of the building to improve the building energy efficiency.

Description:
CROSS-REFERENCES TO RELATED APPLICATIONS 
     This is a continuation patent application taking priority from application Ser. No. 13/616,709, filed on Sep. 14, 2012. 
    
    
     BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates generally to energy efficient buildings and more specifically to a building insulation system, which provides better insulating properties than that of the prior art and which removes humidity typically trapped in the walls, roof and insulation of the building. 
     2. Discussion of the Prior Art 
     A brochure MB304 published by the North American Insulation Manufacturers Association (NAIMA) continuously since 1991 describes the state of the art most typically used to insulate roofs and walls of pre-engineered metal buildings. This type of building currently represents over 40% of all non-residential buildings of two stories or less built in the US each year. 
     U.S. Pat. No. 4,446,664 to Harkins discloses a building insulation system. U.S. Pat. No. 4,573,298 to Harkins discloses a building insulation system. U.S. Pat. No. 5,953,875 of Harkins discloses a slide-in building insulation system. U.S. Pat. No. 6,247,298 to Harkins discloses a roof fabric dispensing device for insulation systems and air barriers over the exterior plane of the building structural members. U.S. Pat. No. 5,968,311 is a device for installing a vapor retarder over the purlins or joist to support insulation. U.S. Pat. No. 6,705,059 is a rolled fabric carriage device for unrolling a vapor retarding fabric over the tops of purlins which is used to support insulation. U.S. Pat. No. 6,216,416 is a system for installing insulation over purlins. U.S. Pat. No. 5,921,057 is an apparatus for dispensing an insulation support sheet over the purlins. U.S. Pat. No. 5,653,081 is a method for paying out an insulation support sheet for insulating a building roof over the purlins. U.S. Pat. No. 4,222,212 is an insulated roof over the purlins. There are temporary buildings, which have a waterproof coverings over the tops of framing members to form a roof covering and which are commonly used for agricultural and storage purposes. 
     One common problem with the design of current buildings having integrated thermal insulation systems is the requirement for structural fastening of the insulation support apparatus through the plane of the insulation system. The “through-fastening” creates multiple thermal bridges, which reduces the building thermal performance up to fifty percent. The most predominant methods used to insulate pre-engineered metal buildings from as early as the 1950s, until today is simply draping the insulation over the exterior of the building structural members for support, applying the exterior building sheeting directly over the insulation and then applying the exterior sheeting attachment fasteners through the exterior sheeting, through the insulation from the exterior into the underlying building roof and wall structural members. This method results in thermal bridging fasteners with a frequency of about one fastener per every ten square feet of exterior surface area or less. 
     A second common problem is that insulation products in building roofs and walls are sandwiched between the roof or wall structural members and the overlying building exterior sheeting with compression of the insulation thickness and its inherent loss of thermal performance which results from this compression. Placing the roof and wall insulation tightly against the exterior roof and wall sheeting panels blocks the solar heat energy from being absorbed and radiated off the interior surface of the sheeting materials for any practical use. The solar energy that hits the building roof and wall surfaces is lost from any practical collection and use. At the same time, fossil fuel energy is purchased to provide heating, cooling and hot water heating for the building occupants and processes. 
     The third common problem of achieving energy efficient buildings is that the thermal insulation has traditionally been installed during the roof and wall sheeting process. Insulation methods which require the installation of fasteners from the interior during the integrated insulation and exterior sheeting process are shunned by installers of these materials in favor of methods that simply compress the insulation between the roof and wall structural members and the roof and wall sheeting panels with only externally applied fasteners. Such methods eliminate the need for fastening from the interior side of the roof and wall structure during the insulation and sheeting process and therefore are preferred by installers. 
     This practice severely limits the thermal performance of the buildings to much less than the desirable economic insulation levels. Due to the insulation thickness reductions and thermal bridging, building thermal performance is much less than what is required to honestly meet the minimum installed thermal performance criteria set forth by the various state energy codes. The most common building insulation methods not only compress the insulation thickness by variable percentages, but also thermally bridge the exterior conductive building sheeting surfaces to the interior exposed thermally conductive surfaces of the purlins, joists and girts. These structural configurations maximize the uncontrolled heat transfer between the two thermally bridged surfaces on the opposite sides of the thermal insulation layer and will frequently result in seasonal condensation on the interior exposed building structural members. The roof and wall structural members become very hot in the summer, when the heat is not wanted in the building interior conditioned space and are cold in the winter, when the heat is wanted in the building interior conditioned. Buildings that are thermally bridged between through the thermal insulation with exterior exposed conductive sheeting materials and interior exposed conductive roof purlins or joist and exposed conductive wall girts result in the opposite seasonal heat transfer effect that is desired and major loss of heating energy. 
     The cold exterior surface temperatures in the winter typically float up and down crossing over the dew point temperature of the interior conditioned air and also of the dew point temperature of the air trapped within the insulation of the roof and wall assemblies of the building. Fiberglass insulation is mostly air. This condition results in condensation of the water vapor that increases conductivity and reduces the insulation thermal performance, which may result in permanent building structural damage and may also interfere with the building use. If the condensed liquid water accumulates within the building roof and wall assemblies it may also result in dripping and damage to interior building contents. 
     Prior art like that disclosed in the Harkins U.S. Pat. No. 4,446,664 invention uses a steel strap support system, which temporarily spans across building bays with steel straps fastened at their ends and often installed in a woven mesh. A flexible sheet material is custom fabricated to fit the designated building areas, referred to as building bays, with the absolute minimum of field seams except along the building bay perimeter beams, where there is no problem sealing the edges as the workmen work on the top side of the rafter beams. The flexible sheet material is spread out and clamped in position on the platform of spanned support strapping and then fasteners are required to be installed through the steel straps and sheet material from the building interior into the inside flange of building roof purlins or joist from the interior. This method requires approximately one interior applied fastener for every 30 square feet of the building roof or wall structures. Each fastener is a thermal bridge between the steel strapping and the metal structure to which it is attached. 
     The invention of the U.S. Pat. No. 4,446,664 creates a defined space for insulation to expand, which eliminates virtually all unwanted compression of the insulation in the roof structures. This method also completely isolates all-of-the highly conductive metal roof and wall purlins or joist surfaces from direct contact with the interior conditioned air. This system however requires the installation of the fasteners from the interior of the building during the integrated process of installing the insulation and the sheeting of the building&#39;s exterior roof surfaces. The Harkins &#39;664 patent, while much more thermally efficient than typical methods, is often avoided in favor of much less thermally efficient insulation products and methods which do not require fasteners to be installed from the building interior during the integrated roof insulation and exterior roof sheeting process. 
     Another problem that occurs in metal panel sheeted buildings is seasonal condensation problems in the wall and roof systems. This phenomenon becomes particularly evident with metal-sheeted buildings because the metal panel temperatures change almost instantly with a change in exterior temperatures. Typically, water vapor within the building interior conditioned space concentrates along with a natural heat gradient at the highest elevations within the building heated space. The concentration of water vapor in air is often measured and expressed as relative humidity. The warmer the air mixture is, the more the weight of water, in vapor form, it can hold. Water vapor will condense on any surface of the building structure it contacts, which is below its dew point temperature. The dew point temperature is the temperature at which the relative humidity of the air contacting the cooler surface will reach 100% relative humidity and begin depositing the excess water vapor as liquid water on that cooler surface. A similar phenomenon occurs within an air mixture itself as it cools and this condensation manifests itself as fog, dew, rain and other forms of precipitation. 
     In buildings, water vapor will migrate through the vapor retarders, through poorly sealed joints, through staple holes, through gaps, etc. and will condense on the interior surface of the exterior sheeting panels when the exterior surface temperatures are below the dew point temperature of the air mixture within the insulation space of the roof and wall assemblies of the building. The typical preferred insulation methods fill the roof and wall assemblies to the exterior sheeting and any moisture is trapped inside of the wall and roof assemblies. The moisture may condense and may accumulate seasonally during cold temperatures. This trapped water vapor and resultant liquid water will cause premature deterioration of the building roof and wall building components and will shorten the useful life of the building if it can&#39;t escape naturally. Many older metal buildings leak air or breathe through the eave and wall flashings and the unsealed wall panel joints due to wind pressure differences. This breathing allowed much of the trapped water vapor to escape, but at the expense of thermal insulation performance. New energy code requirements for sealing all construction joints will essentially eliminate this typical water vapor escape mechanism resulting in a much greater potential for condensation and accumulation of liquid water within these building roof and wall assemblies of the future. 
     Buildings that have the compressed thermal insulation, buildings that attempt to fill the roof and wall cavities, buildings that have thousands of staple holes along uniformly spaced insulation facing seams, buildings that have substantially thermally bridged conductive interior and exterior surfaces, buildings that trap and accumulate condensed water vapor within the insulated roof and wall assemblies, and buildings which repel the free solar heat energy hitting its exterior surfaces require significantly greater heating and cooling equipment capacities, require excessive fuel piping, require excessive electrical wiring, require excessive service capacities and cost significantly more to heat, cool and ventilate than would be required, if the above mentioned problems were solved. 
     Accordingly, there is a clearly felt need in the art for a building insulation system, which provides the following useful advantages: 
     That creates a defined space of sufficient air volume and distance between the roof and wall thermal insulation layer and the conductive exterior sheeting materials to achieve the economic insulation thickness and air gap space to operably manage the intrinsic air mixture, the air flows within and the collection of solar heat from the adjacent heat absorbing, conducting and radiating surfaces of the exterior building sheeting and of their thermally bridged roof purlins and wall girt structural members. 
     That creates a continuous insulation layer without having structural thermal bridging, nor having fasteners inserted through the insulation layer to support itself. An insulation layer that is supported completely from the interior side without the need for any fasteners installed from the interior during the integrated ceiling thermal insulation and exterior sheeting process of a building. 
     That provides for the natural collection and concentration of heat energy within defined air gap spaces created within the roof and wall assemblies, which heat can be actively collected from the defined spaces by one of several methods and used to reduce energy consumption for the building, its occupants and related processes. 
     That provides for water vapor control within the defined roof and wall assembly spaces to concentrate the water vapor by natural means and to actively remove and collect the water from the roof and wall defined air gap spaces as required to minimize any damaging accumulation and allow the simple collection and use of the clean water for various useful purposes. 
     That maximizes the absorption, collection and transfer of solar heat energy hitting the exterior surfaces of the building and to actively use the clean solar energy to reduce the consumption of purchased energy for the building interior space conditioning and related use processes. The colors and the emissivities of the roof and wall exterior sheeting panel surfaces can be selected to maximize solar energy absorption, transfer and use of the free solar energy, as opposed to reflecting it back into the external environment with it&#39;s value completely wasted, as is currently the predominant practice and also part of a growing trend known as “cool roofs” and highly reflective, “low emissivity” surface coating. 
     That use an active heat collection duct and piping systems installed at optimal locations within the defined air gap layers created within the walls and roof assemblies as a source for concentrated heat to be used directly with air circulation and/or indirectly through the use of a heat exchanger system such as a water pumping and storage system with fan-coil heat transfer units, baseboard type heating radiators, or the use of electric powered, refrigerant type of compressor driven electric heat pumps that collect heat from the pre-heated, pre-concentrated air within the solar wall and solar roof air gap layers in lieu of exterior unheated ambient air as a source for the heat energy it collects and transfers. Efficiencies of over 50 Btu&#39;s per watt are expected from this new solar heat pump building invention. 
     That would facilitate the collection, concentration and storage of the clean solar heat energy in water stored in insulated reservoirs for off peak demand use for space heating and hot water production processes. Excess heat energy collected can be used to melt snow and ice off roofs, driveways, sidewalks, etc. to eliminate typical removal costs, saving equipment costs, time and additional energy. The relatively clean water from snow and ice melting can also be collected, and recycled for many useful purposes. 
     That interconnects the wall solar energy air gap collection system to the roof solar energy air gap layer collection system which will facilitate the transfer of concentrated heat from the wall air gap layer to the roof air gap layer on demand. This heat transfer allows the building roof to be kept free of snow and ice by using solar heat energy collected in the wall air gap layer to maintain the solar exposed roof absorptive surface area exposed to direct solar energy to absorb the maximum solar energy possible. 
     That will use free solar heat from the solar wall collection system to eliminate ice damming on cold roof edges by keeping them free of ice accumulation caused by chronic build-up of ice from very slow melt of snow and ice off the exterior roof sheeting due to thermal bridging from the interior conditioned space and through the compressed thermal insulation. 
     That uses a subterranean air tubing and air conditioning system to pre-condition incoming ventilation air in all seasons to save energy and to also to simultaneously remove water vapor from warm, humid, incoming air during the summer cooling season, thereby reducing both the latent and sensible cooling loads required to maintain the interior conditioned space temperature and humidity at desired levels. 
     That simplifies the installation process and eliminates the requirement for any fastening from the interior of the building during the integrated process of installing the insulation support sheet material, the roof insulation and the exterior sheeting panels of the building roof. 
     That eliminates thermal bridging through the roof insulation to support the insulation layer. 
     That eliminates thermal bridging through the wall insulation layer for support of the insulation. 
     That reduces the need for energy for building environmental space conditioning to such a low level, that for practical investment payback reduces the building life cycle cost to a degree that renewable energy generation may be added to the building project so that it annually requires a net total of zero or less purchased energy for typical building conditioning and lighting loads, excluding other user loads, if any. 
     SUMMARY OF THE INVENTION 
     The present invention provides a building insulation system, which includes better insulating properties than that of the prior art and which removes humidity typically trapped in the walls, roof and insulation of the building. A solar heat pump building preferably includes a building, at least one air gap heat collection layer, a tension supported flexible sheet material layer, a material insulation layer retained by the sheet material, a plurality of air ducts, a plurality of air duct dampers, a plurality of heat collection pipes, and an active mechanical heat pump collection, concentration, transfer and distribution system. The building is preferably a metal building, but other types of buildings may also be adapted for use with the invention. The typical metal building includes a plurality of rafter columns, a plurality of end columns, a plurality of girts, a plurality of girt clips, a plurality of rafters, a plurality of purlins, a plurality of purlin clips, a plurality roof panels, a plurality of wall panels, and a plurality of bolts, nuts, fasteners, flashings and sealants. 
     The plurality of rafter columns and the plurality of end columns are attached to a foundation to form a perimeter of the metal building. The plurality of girts are retained by clips extending off the exterior surfaces of the rafter columns and by a plurality of girt clips extending off the exterior surfaces of the end wall columns with girts spanning between adjacent pairs of the plurality of rafter columns girt clips and between adjacent pairs of the plurality of end wall column girt clips. The plurality of rafters are attached to a top of the plurality of rafter columns. Rafters are attached to the top of the building corner rafter columns at the end walls and also are attached between building corner rafters columns to the tops of a plurality of the end wall columns. The plurality of roof purlins are retained by a plurality of purlin clips extending above the exterior surface of the plurality of rafters. The plurality of ceiling sheet material support struts are retained spanning between, or over, adjacent pairs of the plurality of rafters. 
     The solar heat pump building roof system includes the exterior roof sheeting panels, a purlin structural support system, an air gap heat collection layer, a material insulation layer, at least one insulation supporting sheet material, sheet material support struts and eave inside corner sheet material support struts. Each ridge sheet material support strut is attached spanning between adjacent pairs of rafters and supported by the building rafters. At least one sheet material support strut is attached below a ridge of the building roof and defines the inside sheet material ceiling line below the ridge. Each sheet material eave support strut is attached in an inside corner between two adjacent rafters/rafter columns and defines the inside corner of the ceiling and wall junction of the sheet material in the building. For ease of installation a sheet material may extend continuously from a ridge sheet material support strut around the outside of an eave support strut to a termination point at a floor of the building or alternatively to a termination point created between the floor and the inside corner support strut. The ceiling sheet material is attached at opposing termination points with adhesive, a tensioning device or any other suitable attachment devices and methods. At least one tensioning device is preferred for each sheet material to control and manage deflection of the sheet material within desirable limits. 
     Alternatively, the sheet material extends from the floor of one side of the building around the exterior of one inside corner eave support strut, over a ridge support strut, around the exterior of the opposite wall inside corner eave support strut and downward for attachment to the floor on an opposing side of the building. Alternatively the ceiling sheet material may be terminated at an intermediate ceiling, eave or wall support strut. Intermediate support struts may be attached spanning between or over two adjacent roof rafters, between to adjacent rafter columns or between two roof purlin clips or wall girt clips. 
     The ceiling material insulation layer is inserted between at least one ceiling sheet material and a bottom of the plurality of roof sheets and preferably a bottom of the roof purlins with a air gap layer created to the exterior side of the material insulation layer. A plurality of vent spacer blocks may be attached to the interior or exterior facing flanges of the purlins prior to installation of the exterior metal roof panels. The vent spacer blocks have vent holes to insure the heat and convection air naturally flows between the roof air gap layer spaces between adjacent purlins within the solar heat pump building roof. The plurality of thermally conductive metal roof panels are attached to the outer surface flanges of a plurality of the roof purlins. The building air gap heat collection layer is thereby created between an outer surface of the ceiling insulation layer and the inside surface of the roof metal sheeting panels. The purlin clips on the rafters may be extended to provide the desired distance for the ceiling insulation layer without compression of the designed insulation thickness. The typical metal building ridge cap may be used to complete the roof at the building ridge but with less efficiency than the optional multi-vent. An optional ridge mounted multi-vent extends through a ridge of the roof and extends any length of the roof desired by the designer. The ridge mounted multi-vent replaces the typical metal building ridge cap and is located between two ridge purlins or at the high side of the building if the building is a single slope building. The multi-vent provides heat collection, heat concentration, heat transfer, ventilation, dehumidification, day-lighting and building management functions. 
     The solar heat pump building wall system preferably includes an exterior metal wall panel, thermally conductive metal girts, an air gap heat collection layer, vent spacer blocks on interior girt flanges, a first exterior sheet material which is typically an extension of the ceiling sheet material, a material insulation layer, a second interior wall sheet material which covers the wall material insulation layer from the exposure to the building interior space, and a means of using the concentrated heat within the air gap layer(s). The solar heat pump building end wall systems contain the same general components as a side wall system. The solar heat pump buildings preferably include a plurality of inner girt vent spacers and may also include a plurality of outer girt vent spacers containing a plurality of air vent holes to ensure the natural concentration of heat energy at the top of the wall air gap layer and allow convection air flows between girt spaces within the wall heat collection air gap layer of a system. Solar collected heat rises naturally and concentrates at the highest points of the wall and roof air gap layer(s) that it can achieve. A plurality of outer girt vent spacers may be attached to the exterior facing flanges of the girts prior to installation of the exterior metal wall sheeting panels. The inner girt vent spacers are attached to the interior facing flanges of the girts prior to installation of the first (exterior) sheet material which defines the interior surface of the wall air gap layer. 
     A plurality of rigid formed insulation hangers are then attached to the interior facing surface of the first (exterior) wall sheet material. A material insulation layer is attached in substantial contact without the interior-most surface of the first (exterior) wall sheet material using the pre-installed insulation hangers. The material insulation is impaled on the rigid formed insulation hangers designed for this purpose which are completely supported by the exterior wall sheet material and not fastened to the building girts to eliminate thermal bridging to the material insulation layer. A top of each second (interior) wall sheet material is securely attached to the ceiling sheet material, such that it&#39;s outer surface is in substantial contact with an inner-most surface of the wall material insulation layer. A bottom of each interior wall sheet material is attached to floor with adhesives, tensioning device, or other other suitable attachment means, such that it contacts the wall material insulation layer. The material insulation layer is thereby sandwiched between the first and second wall sheet material layers. The solar heat collecting wall air gap layer is thereby created between an inner surface of the exterior wall panel and the outer surface of the first (exterior) wall sheet material layer 
     The solar heat pump building wall heat collection air gap layer is preferably connected to the roof heat collecting air gap layer at their intersection at the building eave area so that the concentrated wall heat may be naturally transferred to the roof air gap layer, preferably on demand, by using a damper system at this junction, and the wall heat energy therefore used to keep the building roof heat absorbing surfaces fully exposed to absorb solar energy by keeping the roof surfaces free of snow and ice with free solar heat. 
     The plurality of wall ducts include side wall ducts and end wall ducts. The plurality of side wall ducts preferably include two side wall eave line roof ducts, two side wall upper wall ducts, two side wall base ducts and two side wall subterranean air ducts. The plurality of end wall ducts preferably include two upper wall ducts and two end base wall ducts. Each duct includes a rectangular (preferably square) tube, which preferably includes a plurality of air flow holes formed through the sides thereof. A damper strip slot is formed in all four sides to receive a sliding damper strip. The damper strip also includes a plurality of air flow holes. The hole locations and hole sizes in the damper strip are engineered to equalize the collection (intake) and distribution (exhaust) of air flows evenly through the wall and roof air gap layers along the length of each duct to maximize the collection and concentration efficiency of heat energy rising through the walls and roof of the solar heat pump building. A damper strip actuation device is used to open and close the plurality of air flow holes of the various air flow paths on demand by sliding the damper strips in a damper slot of a duct. Duct end caps are used to enclose the air streams between the ends of duct sections as desired. 
     Each side wall eave roof duct is located at the top of the wall air gap layer to communicate with the roof air gap layer. Each side wall upper wall duct is located immediately below a side wall eave roof duct and communicates with the wall air gap layer. The side wall eave roof ducts are capable of receiving outside air through its air flow holes or a branch duct which communicates the upper wall duct or with the outside air. The side wall eave roof ducts are also capable of receiving heat and air through its air flow holes or a branch duct which communicates with an upper side wall duct. The upper side wall ducts and upper end wall ducts collect heat energy and air from the respective wall heat collecting air gap layers through the air flow holes which communicate with the wall air gap layer below the respective upper wall ducts. 
     The side wall and end wall base ducts are at the base of the respective wall heat collecting air gap layers. A wall base duct is located adjacent the wall sheeting panels, above the floor, with air flow holes which communicate with the wall air gap layer. A side wall or end wall base duct is capable of receiving outside air through its air flow holes or a branch duct which communicate with the outside air. The side wall or end wall base duct is also capable of receiving interior space air through its air flow holes or a branch duct which communicate with the interior space air. The side wall and end wall base ducts are capable of supplying air to the bottom end of the wall heat collection air gap layer from either the outside air or the inside air or both, through its air flow holes which communicate with the wall air gap layer. The air flows are preferably controlled by an active damper in a damper slot or in the branch duct, as applicable. 
     Two subterranean air ducts are located adjacent to the interior foundation walls at two opposite building walls, at or below floor level and extend substantially the length of each respective opposing building wall. A wall subterranean air duct communicates with the interior space air through air flow holes or branch ducts. The opposite subterranean air duct communicates with the outside ambient air through a branch duct, containing a damper and an internal, air stream mounted fan powered by energy. A plurality of subterranean tubing is located below a floor of the building preferably at a depth of six to eight feet with each opposing tube end connected to the opposing subterranean duct located near the floor adjacent to the opposing foundation walls of the building. Warm outside air flowed through the plurality of subterranean ducts and subterranean tubing will be cooled by a cooler ground temperatures during the cooling season. Outside warm humid air flowed through a plurality of the cooler subterranean ducts and subterranean tubes will be naturally dehumidified by the cooler earth ground temperatures during the cooling season. Cooler air flowed through the plurality of subterranean ducts and subterranean tubes will be warmed by a warmer earth ground temperature during the heating season. 
     It is preferable that the plurality of subterranean ducts be oriented either parallel to the ends of the building or parallel to the sides of a building which are substantially opposite each other and the plurality of the subterranean tube ends connect between the to opposing wall subterranean ducts. 
     It is preferred that each subterranean tube be sloped to a low point and connected to a common drain pipe to collect seasonal condensation and pipe it to run by gravity to a common collection reservoir for recycling for other uses. 
     The ridge mounted multi-vent device includes a plurality of vent modules attached in series. The plurality of vent modules are connected to each other end-to-end with any suitable attachment device or method such as installing bolts or screws. Each vent module includes a box unit. The box unit includes a vent base, two end walls, two side walls and two box side flanges. The two end walls extend upward from opposing ends of the vent base and the two side walls extend upward from opposing sides of the vent base. A single flange extends outward from a top of each box side wall. At least one opening is formed through each end wall to allow the flow of air between adjacent modules. A hole may also be formed through each end wall to receive a heat collecting pipe apparatus. This pipe apparatus would include pipe, heat collecting fins, condensation collecting trough, joint connectors, support brackets and drain tubing. 
     The top and bottom covers include a cover portion and a pair of cover side flanges. The cover side flange extends from each side of the cover portion. A sealing material may be placed between the cover side flanges and the box side flanges. A sealing material may be placed between the cover ends and the box end panels. The cover is fabricated from a material, which is light collecting, light diffusing, light transmitting, light concentrating, light reflecting or opaque to light. The box unit may have side wall and end wall wall extensions with are adapted to make the overall height of the box unit fit the thickness of the building roof assembly to close any air leaks between the interior space air and the roof insulation and air gap layer. 
     Damper strip slots are formed in the box side wall panels to receive a sliding damper strip similar to that of the wall ducts. A plurality of air flow holes are formed through the box side wall panels within the slot. The damper strip includes a plurality air flow holes, which generally align with the plurality air flow holes in the box unit side walls. A continuous damper strip may be installed spanning between multiple multi-vent modules to be operated by a single damper actuator. The damper strip may be shifted in the damper slot with a damper strip actuation device to allow the air flow holes to be opened or closed to any degree by sliding a damper strip in the damper slot. The collected solar heat entering the multi-vent is naturally concentrated from the roof solar heat collection air gap layer of the roof on either side of the ridge or both. The solar heat collected in the wall air gap layer may be extracted at the top of the wall air gap layer or passed on upward into the roof solar heat collection air gap layer to be carried further upward and concentrated below the ridge cap or in the multi-vent for extraction for direct use as heated air, for extraction for indirect use by a heat absorption pipe of a heat pump for space heating, for heating process water, for the generation of power, for other useful purposes or may simply be exhausted to the atmosphere to cool the building roof. 
     The optional multi-vent forms a heat and air collection duct when joined end-to-end which can be connected to an in-line branch duct containing a powered fan or to an air handler unit to efficiently move and concentrate the solar heated air of the solar heat pump building air gap layers for useful purposes, rather than simply wasted as is the current state of the art. 
     Accordingly, it is an object of the present invention to provide a building insulation system, which creates an air gap layer between the roof and wall thermal insulation layer and the conductive exterior sheeting and framing materials to operably manage the intrinsic air mixtures, the heat and air flows and the collection of solar heat from the adjacent heat absorbing surfaces of the exterior building sheeting panels and thermally bridged to conductive roof purlins and wall girts. 
     It is a further object of the present invention to provide a building insulation system, which creates a continuous insulation layer without having structural thermal bridged fasteners inserted through the insulation layer to retain the insulation system layer. 
     It is another object of the present invention to provide a building insulation system, which has an insulation layer without fasteners being installed from the interior side through a sheet material to roof purlins or wall girt framing. 
     It is yet a further object of the present invention to provide a building insulation system, which does not require the installation of bottom side fasteners during the process of installation of the insulation and roofing of a building. 
     It is yet a further object of the invention to provide a method of installation of a ceiling sheet by tensioning a sheet material over underlying support struts to safely support it&#39;s designed loads below the purlin or joist structures of a building without the need for fasteners to be installed from the interior side during the process of installing the material insulation layer and roof sheeting materials to complete a building roof system. 
     It is yet a further object of the invention to provide a building insulation system with a tensioned ceiling sheet that will provide fall protection safety for workmen installing building construction materials above the upper surface of an installed tensioned ceiling sheet. 
     It is yet a further object of the invention to provide a building insulation system with a tensioned ceiling sheet material system structure, which will support a 400 pound weight object, nominally 30 inches plus or minus two inches in diameter, dropped from height not less than 42 inches above the plane of the tensioned ceiling sheet material without the weight falling more than six feet below the bottom plane of the sheet material. 
     It is yet a further object of this invention to provide a building insulation system with an installer safe fall prevention feature employing a tensioned ceiling sheet material building structure that will support in tension, between opposing attachment points, a minimum of 1000 pounds of static weight superimposed on a upper side of the sheet material. 
     It is yet a further object of the present invention to provide a building insulation system to create a solar heat pump building structure which provides for the natural concentration of heat energy within the defined air gap spaces created within the roof or wall assemblies, where heat can be actively managed and collected from the defined spaces by any of several methods and used to reduce energy consumption for the building, its occupants or for other processes. 
     It is yet a further object of the present invention to provide a building insulation system to create a solar heat pump building structure for water vapor collection and control within the roof and wall defined air gap layer to concentrate the water vapor by natural means and actively condense and collect the liquid water from the roof and wall defined air gap layer spaces of the building. 
     It is yet a further object of the present invention to provide a building insulation system to create a solar heat pump building structure, which maximizes the absorption, collection and transfer of solar heat energy hitting the exterior surfaces of the building for the active use of the solar energy to reduce the consumption of purchased energy for the building interior space conditioning and processes. 
     It is yet a further object of the present invention to provide a building insulation system to create a solar heat pump building structure, which uses an active heat collection piping system installed at desirable locations within the defined air gap spaces created within a wall or roof assembly as a source for naturally concentrated heat energy to be used directly with active air circulation and/or through the use of an active indirect heat exchanger system. 
     It is yet a further object of the present invention to provide a building insulation system to create a solar heat pump building, which would facilitate the collection, concentration and storage of the solar heat energy in water stored in reservoirs for off peak demand use for space heating and for hot water processes. 
     It is yet a further object of the present invention to provide a building insulation system to create a solar heat pump building, which uses a subterranean air tubing as an air conditioning system to pre-condition incoming ventilation air in any season to save energy and to also to simultaneously remove water vapor from incoming humid air. 
     Finally, it is another object of the present invention to provide a building insulation system to create a solar heat pump building, which reduces the need for energy for the building environmental space conditioning to such a low level, that for very practical investment, renewable energy generation may be added to the building so that it annually requires zero or less net purchased energy for typical space conditioning and lighting needs excluding other user loads. 
     These and additional objects, structures, advantages, features and benefits of the present invention will become apparent from the following specification. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a perspective cutaway view of a typical metal building. 
         FIG. 1   a  is a perspective cutaway view of a typical metal building with a plurality of ducts installed. 
         FIG. 2  is a cross sectional end view of a metal building, before installation of a tensioned ceiling or wall sheet material in accordance with the present invention. 
         FIG. 3  is a cross sectional end view of a metal building, as a sheet material is partially installed over sheet material support struts in accordance with the present invention. 
         FIG. 4  is a cross sectional end view of a metal building, after installation of a sheet material when a sheet material is terminated at a ridge sheet material support strut in accordance with the present invention. 
         FIG. 4   a  is an enlarged cross sectional end view of a ridge ceiling support strut for retaining a ceiling sheet material in a metal building with a termination of the sheet material at one of two adjacent ridge ceiling sheet material support struts in accordance with the present invention. 
         FIG. 4   b  is an enlarged cross sectional end view of an eave inside corner support strut for retaining a ceiling sheet material in a metal building in accordance with the present invention. 
         FIG. 5  is a top view of a metal building containing purlins and ceiling sheet material support struts, prior to the installation of a ceiling sheet material, a thermal insulation layer and roof sheeting panels in accordance with the present invention. 
         FIG. 6  is a cross-sectional top view of a metal building below purlins with at one ceiling sheet material installed and another in a cut-a-way view showing underlying ceiling sheet material support struts in accordance with the present invention. 
         FIG. 7  is a cut-a-way top view of a metal building with a ceiling insulation layer installed on top of at least one ceiling sheet material prior to the installation of any roof sheeting panels in accordance with the present invention. 
         FIG. 8  is a cut-a-way top view of a metal building with a ceiling insulation layer installed on top of at least one ceiling sheet material and a roof panel installed on top of a plurality of purlins, an air gap layer is formed between a ceiling insulation layer and a roof sheeting panel in accordance with the present invention. 
         FIG. 9  is a cross sectional end view of a metal building with subterranean air conditioning ducts and tubing installed below a floor with a condensate drain pipe and water collection reservoir in accordance with the present invention. 
         FIG. 10  is a partial cross sectional end view at a side wall column location of a metal building illustrating a side wall from a foundation and floor to the eave and roof of the building in accordance with the present invention. 
         FIG. 10   a  is a turnbuckle tensioning device for tensioning a wall or ceiling sheet material. 
         FIG. 10   b  is a right angle take-up tensioning device for tensioning a wall or ceiling sheet material. 
         FIG. 10   c  is a hook and treaded rod tensioning device for tensioning a wall or ceiling sheet material. 
         FIG. 10   d  is a ratchet strap tensioning device for tensioning a wall or ceiling sheet material. 
         FIG. 10   e  is a turning shaft tensioning device for tensioning a wall or ceiling sheet material. 
         FIG. 10   f  is a single adjustable strut tensioning device for tensioning a wall or ceiling sheet material. 
         FIG. 10   g  is a bidirectional adjustable strut tensioning device for tensioning a wall or ceiling sheet material. 
         FIG. 10   h  is a strap winch tensioning device for tensioning a wall or ceiling sheet material. 
         FIG. 11  is a partial cross sectional view of a metal building illustrating an end wall from foundation and floor to a gable end eave and roof of a building at the location of a ceiling sheet material support strut in accordance with the present invention. 
         FIG. 12  is a top view looking into a side wall or an end wall of a metal building illustrating an air gap layer, a material insulation layer and a girt with interior and exterior flange mounted vent spacers in accordance with the present invention. 
         FIG. 13  is an end view looking into a side wall or an end wall of a metal building illustrating an air gap layer, a material insulation layer and a girt with interior and exterior flange mounted vent spacers in accordance with the present invention. 
         FIG. 14  is an enlarged cross sectional end view of a heat collecting dehumidifier pipe with square fins retained above a water collection trough in a ridge air gap layer or in a ridge mounted multi-vent, which may also be used in an upper wall air gap layer or upper wall duct to collect heat and dehumidify the wall or roof air gap air in accordance with the present invention. 
         FIG. 15  is an enlarged cross sectional end view of a heat collection coil/dehumidifier retained above a water collection trough in a wall duct or a multi-vent in accordance with the present invention. 
         FIG. 16  is an exploded perspective view of a single duct module with an end cap, but without damper strips in accordance with the present invention. 
         FIG. 17  is a perspective view of a damper strip for insertion into a damper strip slot of a duct module or multi-vent module in accordance with the present invention. 
         FIG. 18  is an exploded perspective view of a ridge mounted multi-vent, a similar multi-vent turned ninety degrees may be mounted in place of an upper wall duct in a sidewall or end wall to function for system inspection, wall daylighting purposes and other uses in accordance with the present invention. 
         FIG. 19  is an end view of a box unit of a ridge mounted multi-vent with a damper slot formed in the opposing sides thereof to retain two operable damper strips in accordance with the present invention. 
         FIG. 20  is an end view of a box end panel extension of a ridge mounted multi-vent in accordance with the present invention. 
         FIG. 21  is a cross-sectional end view of a typical metal building ridge cap made of a formed corrugated roof panel in a building ridge, which matches the corrugation configuration of roof panels. 
         FIG. 22  is an alternative cross-section end view of a typical metal building ridge cap formed into two flat planes and two formed metal closures to fill in the corrugation profile of the roof sheeting panels, a closure installed on each side of a ridge, the ridge cap does not need to match the roof panel corrugation with this design. 
         FIG. 23  is a perspective view of a modular duct connection coupling in accordance with the present invention. 
         FIG. 24  is a side view of a duct module with the duct connect coupling installed on one end in accordance with the present invention. 
         FIG. 25  is a perspective view of a bi-directional insulation hanger device designed to quickly impale and suspend from a wall sheet material on one side and to support an impaled insulation layer on the opposing side without any thermal bridging to a metal wall girts or to the interior space air in accordance with the present invention. 
         FIG. 26  is a rear view of the bi-directional insulation hanger device illustrated in  FIG. 25  in accordance with the present invention. 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     With reference now to the drawings, and particularly to  FIGS. 1 and 10 , there is shown a cut-away perspective view of a metal building  100 . With reference to  FIGS. 10 ,  11 , the metal building  100  preferably includes a heat collection air gap layer  10 ,  12 , air vent spacers  36 ,  38 , an insulation retaining sheet material  14 ,  30 , a material insulation layer  16 ,  32 ,  34  and a plurality of ducts  40 ,  42 ,  44 ,  48 ,  50 . The metal building  100  is shown, but other types of buildings may also be used. The metal building  100  includes a plurality of rafter columns  102 , a plurality of end columns  104 , a plurality of wall girts  106 , a plurality of rafters  108 , a plurality of purlins  110 ,  128 ,  134 , a plurality roof exterior sheeting panels  112 , a plurality of wall exterior sheeting panels  114  and a peripheral base channel  116 . The plurality of rafter columns  102  and the plurality of end columns  104  are attached to the peripheral base foundation  118 . The peripheral base channel  116  is attached to a foundation  118  to form a perimeter of the metal building  100 . The plurality of girts  106  are retained between horizontally extended girt clips  111 , off the exterior surfaces of the plurality of rafter columns  102  and end columns  104 . The plurality of rafters  108  are attached to a top of the plurality of rafter columns  102 . The plurality of purlins  110 ,  128 ,  134  are retained between vertically extended purlin clips  113  above the exterior faces the plurality of rafters  108 . 
     With reference to  FIGS. 10 and 16 , the heat collecting air gap layers include a roof heat collecting ceiling air gap layer  10  and a wall heat collecting air gap layer  12 , which communicate with each other on demand through duct damper holes  56  to increase the total heat collector surface area available to absorb solar heat. The solar heat from the east, west, south or north walls can be individually directed through ducts  40 , 42 , 48  through damper holes  56  to the solar exposed roof  120 , to melt snow and ice, thereby maximizing the total heat absorption surface area to achieve greatest volume and heat energy concentration. 
     With reference to  FIGS. 2-8 , the composite roof assembly preferably includes at least one ceiling sheet material  14 , a ceiling material insulation layer  16 , at least two intermediate ceiling support struts  18 , at least two ridge ceiling support struts  20  and at least two eave inside corner ceiling support struts  22 . Each intermediate ceiling support strut  18  and eave inside corner ceiling support strut  22  are attached between two adjacent rafters  108 . Each ridge ceiling support strut  20  is attached to two adjacent rafters  108  adjacent a ridge  122  of the roof  120  and vertically aligned below the roof  120  ridge purlins  128 . Each eave inside corner ceiling sheet material support strut  22  is attached to define an inside corner between a roof  120  and a side wall  124  sheet materials  14 ,  30  of the metal building  100 . One end of the ceiling sheet material  14  is inserted behind the eave inside corner ceiling sheet material support strut  22 , above the intermediate ceiling sheet material support struts  18 , above the ridge ceiling sheet material support strut  20  adjacent a ridge  122  of the roof  120  and securely attached to the nearest ridge ceiling support strut  20  with fasteners or the like. The other end of the ceiling sheet material  14  is attached to either a foundation  118  or a floor  126  of the metal building  100  with adhesive, a tensioning device  24  or any other suitable means. 
     With reference to  FIGS. 10   a - 10   h , a variety of tensioning devices include a turnbuckle tensioning device  202 , a right angle take-up tensioning device  204 , a hook and threaded rod tensioning device  206 , a ratchet strap tensioning device  208 , a turning shaft tensioning device  210 , a single adjustable strut tensioning device  212 , a bi-directional adjustable strut tensioning device  214  and a strap winch tensioning device  216 . 
     Alternatively, one end of the sheet material  14  is secured to the foundation  118  or the floor  126  on one side of the metal building  100  and the other end of the sheet material  14  is inserted around the exterior side of one eave inside corner ceiling support strut  22 , inserted over the intermediate ceiling sheet material support strut(s)  18 , inserted over the two ridge ceiling sheet material support struts  20 , inserted over the opposite side intermediate ceiling sheet material support strut(s)  18 , inserted over the opposite side eave inside corner, ceiling sheet material support strut  22  and finally secured with a tensioning device  24  or any other suitable means to the foundation  118  or floor  126  on an opposing side of the metal building  100 . Significant tension is typically required to limit deflection when supporting the load of the material insulation layer without the intermediate fasteners and the resultant thermal bridging common to all known prior art. The ceiling insulation layer  16  is laid on the at least one ceiling sheet material  14  and includes an insulation thickness that extends upward to near the bottom of the plurality of purlins  110 . Although not required, an air flow path is desired between the material insulation layer  16  and the bottom of the plurality of purlins  110  to allow cooler, more dense air to flow toward the eave purlin  134  to more efficiently complete the movement of the heat energy up over the purlins  110  to the ridge  122  and allow the cooler, more dense air is allowed to flow back down toward the eave purlin  134 . Open web purlins and joists are not shown, but allow the heat energy, humidity and air to flow in all directions without this efficiency concern.  FIGS. 12-13  show a plurality of inner vent spacers  38  that include air vent holes  39  which would be installed on the under side of the bottom flange  132  of the plurality of solid web purlins  110 ,  128  to ensure an air circulation path from ridge to eave. The ceiling heat collecting air gap layer  10  is created between a top of the ceiling material insulation layer  16  and a bottom of the roof panel  112 . Preferably the roof sheeting panels  112  are connected to the tops of the purlins  110  with a plurality of thermal conductive fasteners  26  to maximize thermal conduction from the plurality of thermally conductive roof sheeting panels  112  into the plurality of conductive, radiative roof purlins  110 ,  128 ,  134 . With reference to  FIG. 14 , maximizing conduction will enhance the heat transfer, enhance the heat collection in the air gap layer  10 , enhance the heat concentration at the highest point of the air gap layer  10  closest the ridge  122  and enhance overall efficiency of heat energy collection at the heat collection fins  94  of the heat transfer pipe  92  of the metal building building  100 . Heat transfer fluid  93  circulates inside the heat transfer pipe  92  powered by either a pump or compressor (not shown). 
       FIGS. 18-20  illustrate a preferred alternative multi-vent  74  to a typical metal roof ridge cap  77 ,  79  of  FIGS. 21-22 . The ridge mounted multi-vent  74  extends through the ridge  122  of the roof  120  and preferably extends a length of the roof ridge  122 . The ridge mounted multi-vent  74  is located between two ridge purlins  128  and between the two ridge ceiling support struts  20 .  FIG. 20  illustrates a plurality of multi-vent box side panel extensions  154  and a plurality of multi-vent box end panel extensions  152  which attach to the bottoms of the plurality of multi-vents modules  74  to fill the open space to the bottoms of the two ridge ceiling support struts  20  shown in  FIG. 4 . If the preferred multi-vent is not used and a typical ridge cap  77 ,  79  is used. a single ridge ceiling support strut centered below the ridge line is sufficient to support the ceiling sheet material and the overlying material insulation layer. 
     With reference to  FIGS. 12-13 , each metal building  100  composite wall structure includes an exterior metal wall sheeting panel  114 , an optional exterior girt mounted vent spacer  36 , a girt  106  in the air gap  12 , the interior mounted girt vent spacer  38 , an exterior side wall sheet material which may typically be an extension of the ceiling sheet material  14 , or may be an independent exterior wall sheet material  30 , a material insulation layer  32 ,  34 , and an interior wall material  28 ,  31 . 
     A plurality of optional girt exterior flange mounted vent spacers  36  include a plurality of through air flow openings  37 , if desired to increase the heat flow area upward around the girts. The interior girt flange mounted vent spacers  38  are attached to an interior flange  132  of the girt  106 . The interior girt spacers  38  include a plurality of through air flow openings  39 , if desired to increase the heat flow area around the interior girt flanges. An exterior surface of the wall sheet material  14 ,  30  abuts the plurality of interior flange mounted girt spacers  38 . With reference to  FIGS. 25-26 , a wall material insulation layer  32 ,  34  is secured to a vertical portion of the wall sheet material  14 ,  30  with bi-directional impaling hangers  156  by first impaling the sheet material impaling arrows  160  through the sheet material  14 ,  30  for support and then impaling the insulation layer  32 ,  34  on the opposite side hanger insulation impaling arrows  162  with any suitable method or device. A top edge of each side wall interior insulation covering sheet material  28  is preferably attached to the ceiling sheet material  14  with adhesive, fasteners or other suitable attachment means, such that the exterior surface of insulation covering wall sheet material  28  contacts an interior surface of the wall insulation layer  32  which is typically fiber glass blanket or batt insulation. A bottom edge of each interior insulation covering wall sheet material  28  is attached at its base with a tensioning device  24 , adhesive, fasteners or any other suitable attachment method. A plurality of wall heat collecting air gap layers  12  are created between an interior facing surfaces of the exterior wall sheeting panels  114  and the exterior facing surfaces of the side wall sheet material layer  14  which are typically extensions of the ceiling sheet layer  14 . 
     The outer end wall sheet material  30  abuts to the plurality of inner girt flange vent spacers  38 . A top end of first installed exterior end wall sheet material  30  is preferably attached to the ceiling sheet material  14  with adhesive, fasteners or other suitable attachment means, but may alternatively be attached to the end wall rafter  108  or to end wall girts  106  as limited by accessibility of an individual application. A bottom end of each first installed, exterior end wall sheet material  30  is attached to the foundation  118  or floor  126  with the tensioning device  24 , adhesive or any other suitable attachment device and methods.  FIGS. 10   a - 10   h  illustrate various styles of tensioning devices which may be used to apply tension to the ceiling or wall sheet material  28 ,  31 . Wall material insulation layers  32 ,  34  preferably are suspended from the interior surfaces of the first installed, exterior wall sheet material  14 ,  30 . 
     The plurality of bi-directional impaling suspension hangers  156  are used to suspend the wall material insulation layers  32 , 34  without any conductive thermal bridges to the wall girts  106 . The exterior facing impaling arrows  160  impale the exterior wall sheet material for support. The insulation layer  32 ,  34  is impaled on the opposing impaling arrows  162  to support the insulation in suspension without any thermal bridging to the exterior wall girts and panels. A top end of each second installed, interior wall sheet material  28 ,  31  is preferably attached to the ceiling sheet material  14  with adhesive, fasteners or other suitable attachment means, such that its exterior surface contacts an interior surface of the wall insulation layer  32 ,  34 . A bottom end of each second installed, interior wall sheet material  28 ,  31  is attached at its base with a tensioning device  24  or any other suitable attachment device and method. The end wall heat collecting air gap layer  12  is created between an interior facing surface of the exterior end wall sheeting panels  114  and the exterior facing surface of the first installed, exterior end wall sheet material  30 . The side wall heat collecting air gap layer  12  is created between an interior facing surface of the exterior wall sheeting panels  114  and the exterior facing surface of the first installed, exterior side wall sheet material  14 ,  30 . 
     With reference to  FIGS. 1   a ,  10 - 11 ,  16 - 17  and  23 - 24  the plurality of wall ducts include side wall ducts and end wall ducts. The ducts are joined in series with a plurality of connection couplings  57 . The plurality of side wall ducts  40 ,  42 ,  44  generally have a horizontal orientation. The plurality of side wall ducts preferably include two side wall eave roof ducts  40 , two sidewall upper wall ducts  42 , two sidewall base ducts  44 . The side wall eave roof ducts  40  provide an independent air flow path from the exterior air to the roof air gap layer. The upper side wall air flow duct provides and independent air flow path which communicates with the exterior air and the air gap layer  12 . The plurality of end wall ducts include upper wall ducts  48  with an orientation generally matching the roof slope along the top of the end wall air gap layer  12 . The plurality of the end wall base ducts  50  have a horizontal orientation along the base of the air gap layer  12 . The plurality of end wall ducts preferably include two upper wall ducts  48  and two end wall base ducts  50 . Two subterranean air ducts  46  and subterranean tube ducts  72  connected between the two opposite wall subterranean air ducts  46  also may be installed to pre-condition air used for ventilation, heating, cooling and dehumidification. Each duct  40 - 50  is preferably fabricated from an extruded rectangular (preferably square) tube  54  illustrated in  FIG. 16 . The tube  54  preferably includes a plurality of air flow holes  56  formed through one or more sides thereof. With reference to  FIG. 17 , a damper strip slot  58  is formed in at least one sides side of the tube  54  to receive a damper strip  60 . The damper strip  60  includes a plurality of holes  62 , which may be aligned with the plurality of air flow holes  56  to allow air flow into the tube  54  or to prevent air flow into the tube  54 . Any suitable duct actuation device  64  may be used to slide the damper strip  60  in the damper strip slot  58 .  FIG. 1  illustrates a cut-away perspective view of the general spatial locations of the wall duct and eave line roof duct communicating with the air gap layers  10 ,  12  of the metal building  100 . The ducts need not be installed continuously, nor the full lengths of the building walls but only as desired to provide a useful function. 
     Each sidewall eave roof duct  40  is located below a lengthwise eave purlin  134 . The side wall eave roof duct  40  may be constructed of any suitable material and used to replace the eave purlin  134  and provide the intended combined functions of both the eave line roof duct  40  and the eave purlin  134 . Each end wall upper wall duct  48  is located below an end wall eave channel  136  or below the ends of the roof purlins  110 ,  128 ,  134  if there is no end wall eave channel  136 . The side wall, end wall, and subterranean ducts  40 ,  42 ,  44 ,  46 ,  48 ,  50  are capable of receiving outside air or interior space air through either air flow holes  56  or through branch ducts  63 . Typically there would be an operable damper strip  60  or an operable louver  67  to open or close the air flow holes  56  or branch ducts  63  to air flows. 
     The side wall upper wall duct  42  is located below the sidewall eave roof ducts  40 . The upper wall ducts  42 ,  48  and base wall ducts  44 ,  50  communicate with the air gap layers  12  of the walls. The upper side wall ducts  42  allow heat and air in the wall air gap layers  12  to communicate with the roof air gap layers  10  directly or through eave line roof duct  40 . 
     With reference to  FIG. 15 , a heat collection coil/dehumidifier  66  is preferably retained inside the sidewall upper wall air gap layer  12  or inside the upper wall ducts  42  at this same general location. An coil bracket  68  is secured to one edge of the side wall heat collection/dehumidifier coil  66  and a lower mounting bracket  70  is secured to the other edge of the heat collection/dehumidifier coil  66 . With reference to  FIG. 10 , a blower  65  may be used to transfer heat and air from the wall heat collection air gap layer  12  to an interior space of the metal building  100 . The side wall base ducts  44  and the end wall base duct  50  are located adjacent the wall panel  114  and above the floor  126 . Ends of the side wall ducts  40 ,  42 ,  44  and ends of the end ducts  48 ,  50  are preferably closed with a duct end cap  59  illustrated in  FIG. 16 . The base ducts  44 ,  50  may be made of a suitable material and used to replace a base support channel (not shown) and provide the intended functions of both the base ducting  44 ,  50  and of the base structural support channel  116 . 
     With reference to  FIG. 9 , the two opposing side wall subterranean air ducts  46  are located at a base perimeter of the metal building  100 , preferably at or below floor level and which extends the side wall length of the metal building  100 . One side wall subterranean air duct  46  communicates with the interior air space of the metal building  100  through at least one branch duct  63  or the plurality of duct modules tubes  54  air flow holes  56 . The opposing side wall subterranean duct communicates with the exterior air through at least one opposing branch duct  63  to the exterior air. A plurality of subterranean tubing  72  is located below the floor  126  of the building at a depth of about 6 to 9 feet, which run parallel to each other in the earth with the opposing subterranean tubing  72  ends connected to the two opposing subterranean ducts  46 . Air flowed through the subterranean ducts  46  flows through the subterranean tubing  72  under the building floor  126  will be cooled by a reduced temperature of the earth in contact with the subterranean tubing  72 . One end of the plurality of subterranean tubing  72  is connected to one of the two lengthwise subterranean air tubing ducts  46  and the other end of the plurality of foundation tubing  72  is connected to a second of the two lengthwise subterranean air tubing ducts  46 . 
     It is preferable that the plurality of foundation tubing  72  be oriented either parallel to the end walls of the building or parallel to the side walls of the building. It is preferred that the plurality of subterranean tubing  72  be connected to either the opposing sidewall subterranean ducts  46  or to opposing end wall subterranean tubing ducts (not shown). It is possible to use more than one subterranean duct and tubing system under the floor  126  of the metal building  100  at different depths to condition additional volumes of ventilation air flowing through them. The subterranean tubes  72  should be sloped to a low point and connected to a liquid water drain pipe  71  which connects to a liquid water reservoir  73  from which the condensation water can be stored and recycled for other uses. 
     With reference to  FIGS. 9 ,  18 - 20 , the ridge mounted multi-vent  69  includes a plurality of vent modules  74  attached to each other end to end in series. The plurality of vent modules  74  are secured in series to each other with bolts or any suitable attachment device or method. Each vent module  74  includes a box unit  76  and a cover  78 . The box unit  76  includes a vent base  80 , two end walls  82 , two side walls  84  and two box side flanges  86 . The two end walls  82  extend upward from opposing ends of the vent base  80  and two side walls  84  extend upward from opposing sides of the vent base  80 . A single flange  86  extends outward from a top of each box side wall  84 . At least one air opening  88  may be formed through each end wall  82  to allow the flow of air between the vent modules  74 . With reference to  FIG. 14 , a heat transfer pipe hole  90  may also be formed through each end wall  82  to receive a heat transfer pipe  92 . A plurality of heat fins  94  are attached along a length of the heat transfer pipe  92 . A trough  96  is placed under the heat transfer pipe  92  to catch and channel condensation to a drain (not shown) along its length. 
     The cover  78  includes a cover portion  98  and a pair of cover side flanges  99  disposed on opposing side edges thereof. The cover portion  98  preferably includes a curved cross section. The cover side flange  99  extends from each side of the cover portion  98 . A first sealing material (not shown) may be placed between the cover side flanges  99  and the box side flanges  86 . A second sealing material (not shown) may be placed between the cover portion ends  98  and the box end wall  82  top edges. The cover  78  is preferably fabricated from a material, which is light translucent, light collecting, light diffusing or opaque. A damper slot  150  may be formed into each side wall  84  to slidably retain the damper strip  60 . A plurality of air flow holes are formed through the side walls  84  in the damper slot  150 . The damper strip  60  of  FIG. 17  may be shifted in the damper slot  150  with an actuation device to allow air to flow through air flow holes  62  and  95 . With reference to  FIGS. 21-22 , the covers  78  of the plurality of vent modules  74  are secured through their flanges  99  to ridge roof sheeting panel closures  75  or to the roof ridge purlins  128  structures with fasteners  26  or any suitable attachment device or method. 
     With Reference to  FIGS. 18-20 , the box unit  76  may have two end wall extension panels  152  which attach to base of the end walls  82 , and two side wall extension panels  154  which attach to the base of the side wall panels  84 . These extension panels fill any gap between the ridge support struts  20  and the base  80  of the multi-vent box unit side walls  84  and end walls  82 . A cover  78  with two opposing side flanges  99  may be attached to the side wall extensions from the interior side. The cover  78  is preferably fabricated from a material, which is light translucent, light collecting, light diffusing or opaque. 
     While particular embodiments of the invention have been shown and described, it will be obvious to those skilled in the art that changes and modifications may be made without departing from the invention in its broader aspects, and therefore, the aim in the appended claims is to cover all such changes and modifications as fall within the true spirit and scope of the invention.