Abstract:
An evaporative cooling system to cool the attic space only, in communication with the duct system. The cooling system includes a humidistat and thermostat. To control the evaporative cooling unit, according to the threshold temperature in the attic. Unit will have a smoke detector for safety, once activated will deactivate the evaporative cooling unit. Also, each fan switch will have a high temperature safety device, in the event of a fire or excessive heat in attic area, which will deactivate the cooling unit.

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
       [0001]    This invention has claims of priority, under 35 U.S.C. §120, to U.S. Pat. No. 7,743,620, entitled Cooling System, by Ron W. Severson (Clovis, Calif.), issued Jun. 29, 2010, is incorporated by reference herein. This invention claims no priority, under 35 U.S.C. §119, to any foreign patent application, which would be incorporated by reference herein. This application is not a Divisional Application of, under 35 U.S.C. §121, and claims no priority under 35 U.S.C. §121, to a United States Non-Provisional Application. 
     
    
     COPYRIGHT RESERVATION NOTICE 
       [0002]    A PORTION OF THE PRESENT DISCLOSURE AND DRAWINGS OF THIS PATENT DOCUMENT AND APPENDICES CONTAIN MATERIAL THAT IS SUBJECT TO COPYRIGHT PROTECTION. THE COPYRIGHT OWNER HAS NO OBJECTION TO THE FACSIMILE REPRODUCTION BY ANYONE OF THIS PATENT DOCUMENT OR THE PATENT DISCLOSURE, AS IT APPEARS IN THE PATENT AND TRADEMARK OFFICE PATENT FILES OR RECORDS, BUT OTHERWISE RESERVES ALL COPYRIGHTS WHATSOEVER. 
       BACKGROUND OF THE INVENTION 
       [0003]    1. Field of the Invention 
         [0004]    The present invention relates generally to systems for cooling air within a building structure and, more particularly, to combined cooling systems. 
         [0005]    2. Description of the Related Art 
         [0006]    In the related art, it has been known to use devices to evaporatively cool air within building structures whether they be residential or commercial. It is known that heat from the sun may cause structures, which house people, to heat up resulting in uncomfortable temperatures within such structures. It is often desired by people for systems to be employed to reduce the temperatures within these naturally overheated structures. Various cooling systems exist for such purposes. Often such cooling systems focus on circulating air within the structures and cooling the air by means of evaporative cooling and/or refrigeration cycles. Often there are spaces such as attics or overhead crawlspaces which are not cooled. Since heat flows from a high to a low temperature, any duct work present in such spaces is heated by the hotter air within such space thereby minimizing the effect of the air conditioning. Therefore there is a need for a cooling system which effectively, efficiently and cost effectively, cools overhead spaces thereby maximizing the operation of the entire cooling system which maintains comfortable temperatures in the human occupied space of structures. Some improvements have been made in the field. Examples include but are not limited to the references described below, which references are incorporated by reference herein: 
         [0007]    By the same inventor, Ser. No. 11/761,714, U.S. Pat. No. 7,743,620, entitled Cooling System, by Ron W. Severson (Clovis, Calif.), issued Jun. 29, 2010. Discloses A cooling system for cooling a structure. There is a refrigeration cooling unit; a duct system of the refrigeration cooling unit; an evaporative cooling unit in fluid communication with the attic, and in thermal communication with the duct system; and an exhaust fan providing fluid communication between the attic and an exterior of the structure. The cooling system includes a smoke detector, such that activation of the smoke detector deactivates the evaporative cooling unit. The exhaust fan and the evaporative cooling unit are in logical communication such that activation of the evaporative cooling unit activates the exhaust fan. The exhaust fan is adjacent the duct system. The evaporative cooling unit includes a thermostat in thermal communication with the attic and in control of the evaporative cooling unit according to a threshold temperature of the attic. 
         [0008]    U.S. Pat. No. 5,353,601, entitled Structural Cooling Systems And Methods, discloses an evaporative cooling system. Specifically, there is a structural cooling system which includes an evaporative cooler suitable for cooling a body of air in an upper, enclosed chamber of a structure, such as an attic, and a series of vents or ducts, particularly around the perimeter of the building, for applying the cooled air selectively to high heat-gain portions of the exterior of the structure. An interior cooling system, which may include an air-conditioning unit, is suitable for cooling the interior of the building, but will require only reduced capacity, because of the cooling effect on the structures exterior. 
         [0009]    U.S. Pat. No. 4,879,075, entitled Evaporative Air Cooling Apparatus, discloses an evaporative cooling system. Specifically, there is an evaporative cooler apparatus and method of operation that was conceived and developed to humidify and cool the attic space between the roof and the ceiling of man-made buildings or other structures. The apparatus is comprised of an induced draft fan assembly which blows air through an evaporation bundle comprised of one or more concentric cylinders of fibrous evaporation pads. The most advantageous embodiments of the invention and optimum parameters of operation result in reduced costs for installation, for evaporation water, for electrical power, and for service and maintenance as compared with devices of the prior art. 
         [0010]    U.S. Pat. No. 4,761,965, entitled Evaporative Roof Cooling System, discloses an evaporative cooling system. Specifically, there is an evaporative roof cooling system for placement upon a roof surface exposed to relatively high levels of solar radiation. The system includes water distribution piping and a plurality of mist/spray nozzles positioned on the roof surface for supplying a uniform spray of water there over to lay down a substantially uniform thin film of water on the roof surface. A solenoid-controlled valve controls the supply of water to the system over periods during which the temperature of the roof surface is measured to be within a predetermined temperature range. A thermistor, encapsulated in an epoxy block, is affixed to the roof surface and monitors and measures the actual roof temperature. Cooling systems control circuitry, in electric communication with the thermistor and the solenoid-controlled valve, compares the electric resistance value developed by the thermistor and a range of current values related to the predetermined temperature range and directs the opening of such valve when the thermistor senses the high point temperature of such range and the closing of such valve when the thermistor senses the low point temperature of such range whereby the mist/sprays of water discharged from the nozzles evaporatively cool the roof surface. 
         [0011]    U.S. Pat. No. 4,951,480, entitled Evaporative Cooling Device and Process, discloses an evaporative cooling system. Specifically, there is an evaporative cooling unit which fits within a building wall. The evaporative cooling unit includes a remote fan which pulls air through the unit into a space to be cooled and also exhausts warm air from the space. 
         [0012]    U.S. Pat. No. 5,778,696, entitled Method And Apparatus For Cooling Air And Water, discloses an evaporative cooling system. Specifically, there is an invention that provides a method and apparatus for efficiently using various components as a system for cooling air. The apparatus uses the combination of an evaporative cooler, a refrigerated air system with a water-cooled condenser, a swimming pool pump, and a swimming pool or other bulk water storage container. A pump or series of pumps are used to supply water to the evaporative cooler and to the water-cooled condenser from the swimming pool. After the swimming pool water has been supplied to the other components in the system, it is returned to the swimming pool. During cooler weather, the output air from the evaporative cooler is supplied to a series of ducts and is used to cool the interior of a structure such as a home. When the outside ambient temperature and/or humidity levels exceeds the capabilities of the evaporative cooler for cooling the interior of the structure to the desired temperature, the output air from the evaporative cooler is re-directed to the attic space of the structure and the refrigerated air from the refrigerated air system is used to cool the interior of the structure. By using the output air from the evaporative cooler to cool the attic space, the overall cooling load on the refrigerated air system is reduced. In addition, the use of the water from the swimming pool to condense the refrigerant vapors will enable the system to achieve even greater efficiency and will provide an added benefit of lowering the temperature of the water stored in the swimming pool. 
         [0013]    U.S. Design Pat. 244,294, entitled Evaporative Cooler, discloses an ornamental design for an evaporative cooler. 
         [0014]    U.S. Patent Application 20060032258, by Pruitt; Roger; et. al. entitled Cooling Assembly, discloses an apparatus for air conditioning the interior of a structure is shown which can be run entirely off a DC power source, such as a storage battery. A shell and tube heat exchanger is combined with a mechanical refrigeration system to provide a wet shell side and a dry tube side of the apparatus. In the operation of the air conditioner, a mass of distributed water is established on the wet shell side, and a flow of ambient air is passed through the wet shell side to form a resulting stream of moist air. A flow of ambient air is passed through the dry tube side and a resulting stream of dry cooled air is recovered. The streams of most and cooled air can either be combined or routed separately depending primarily upon the humidity of the surrounding environment to be cooled. 
         [0015]    U.S. Patent Application 20020155807, by Moor, Matthew C.; et. al. entitled Cooling assembly, discloses a device that automatically disables an air-moving device if smoke is detected in a building by a smoke detector is disclosed in which a smoke detector and a control circuit that use signals generated by the smoke detector disrupts the current flowing through either the control or power wiring for the air-moving device. The device is hard wired or wireless and eliminates the distribution of smoke throughout the building by an air-moving device thus preventing unnecessary property damage, smoke inhalation and smoke-filled escape routes, saving money and lives. 
         [0016]    U.S. Pat. No. 5,353,601, entitled Structural cooling systems and methods, issued to Palmer, Oct. 11, 1004, discloses a structural cooling system is disclosed, which includes an evaporative cooler suitable for cooling a body of air in an upper, enclosed chamber of a structure, such as an attic, and a series of vents or ducts, particularly around the perimeter of the building, for applying the cooled air selectively to high heat-gain portions of the exterior of the structure. An interior cooling system, which may include an air-conditioning unit, is suitable for cooling the interior of the building, but will require only reduced capacity, because of the cooling effect on the structure&#39;s exterior. 
         [0017]    The inventions heretofore known suffer from a number of disadvantages which include unduly complex, limited application, difficult to operate, difficult to install, unduly large, unreliable, and/or fail to independently and/or exclusively cool the attic space effectively, efficiently and/or conveniently. 
         [0018]    What is needed is an attic evaporative cooling system that solves one or more of the problems described herein and/or one or more problems that may come to the attention of one skilled in the art upon becoming familiar with this specification. 
       SUMMARY OF THE INVENTION 
       [0019]    The present invention has been developed in response to the present state of the art, and in particular, in response to the problems and needs in the art that have not yet been fully solved by currently available cooling systems. Accordingly, the present invention has been developed to provide a system for using an evaporative cooler placed in an unfinished attic of a structure such as a dwelling or business so as to cool the attic and thus increase the comfort of the primary living and/or working space of the structure as well as the comfort of the attic space itself and/or increase the efficiency of any existing central air-conditioning system(s). 
         [0020]    In one embodiment there is a cooling system for cooling a structure with a roof and an attic. Specifically, there would be an evaporative cooler positioned on top of the roof and in fluid communication with the air in the attic sufficient to expel cooled air into the attic. 
         [0021]    The cooling system, in another embodiment could be designed so that the evaporative cooler includes a thermostat in thermal communication with the attic and in control of an activation state of the evaporative cooler according to a threshold temperature of the attic. 
         [0022]    The cooling system in yet another embodiment could be designed so that the living space air duct has a portion thereof located in the attic and positioned to have a surface of the living space air duct in fluid communication with the air emitted from the evaporative cooler. 
         [0023]    Reference throughout this specification to features, advantages, or similar language does not imply that all of the features and advantages that may be realized with the present invention should be or are in any single embodiment of the invention. Rather, language referring to the features and advantages is understood to mean that a specific feature, advantage, or characteristic described in connection with an embodiment is included in at least one embodiment of the present invention. Thus, discussion of the features and advantages, and similar language, throughout this specification may, but do not necessarily, refer to the same embodiment. 
         [0024]    Furthermore, the described features, advantages, and characteristics of the invention may be combined in any suitable manner in one or more embodiments. One skilled in the relevant art will recognize that the invention can be practiced without one or more of the specific features or advantages of a particular embodiment. In other instances, additional features and advantages may be recognized in certain embodiments that may not be present in all embodiments of the invention. 
         [0025]    These features and advantages of the present invention will become more fully apparent from the following description and appended claims, or may be learned by the practice of the invention as set forth hereinafter. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0026]    In order for the advantages of the invention to be readily understood, a more particular description of the invention briefly described above will be rendered by reference to specific embodiments that are illustrated in the appended drawing(s). It is noted that the drawings of the invention are not to scale. The drawings are mere schematics representations, not intended to portray specific parameters of the invention. Understanding that these drawing(s) depict only typical embodiments of the invention and are not, therefore, to be considered to be limiting its scope, the invention will be described and explained with additional specificity and detail through the use of the accompanying drawing(s), in which: 
           [0027]      FIG. 1  illustrates a perspective view of a structure where a cooling system is incorporated, representing one embodiment of the invention; 
           [0028]      FIG. 2  illustrates a front cross sectional view of a structure where a cooling system is incorporated, representing one embodiment of the invention; 
       
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
       [0029]    For the purposes of promoting an understanding of the principles of the invention, reference will now be made to the exemplary embodiments illustrated in the drawings, and specific language will be used to describe the same. It will nevertheless be understood that no limitation of the scope of the invention is thereby intended. Any alterations and further modifications of the inventive features illustrated herein, and any additional applications of the principles of the invention as illustrated herein, which would occur to one skilled in the relevant art and having possession of this disclosure, are to be considered within the scope of the invention. 
         [0030]    Reference throughout this specification to “one embodiment,” “an embodiment,” or similar language means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present invention. Thus, appearances of the phrases “one embodiment,” “an embodiment,” and similar language throughout this specification may, but do not necessarily, all refer to the same embodiment, different embodiments, or component parts of the same or different illustrated invention. Additionally, reference to the wording “an embodiment,” or the like, for two or more features, elements, etc. does not mean that the features are related, dissimilar, the same, etc. The use of the term “an embodiment,” or similar wording, is merely a convenient phrase to indicate optional features, which may or may not be part of the invention as claimed. 
         [0031]    Each statement of an embodiment is to be considered independent of any other statement of an embodiment despite any use of similar or identical language characterizing each embodiment. Therefore, where one embodiment is identified as “another embodiment,” the identified embodiment is independent of any other embodiments characterized by the language “another embodiment.” The independent embodiments are considered to be able to be combined in whole or in part one with another as the claims and/or art may direct, either directly or indirectly, implicitly or explicitly. 
         [0032]    Finally, the fact that the wording “an embodiment,” or the like, does not appear at the beginning of every sentence in the specification, such as is the practice of some practitioners, is merely a convenience for the reader&#39;s clarity. However, it is the intention of this application to incorporate by reference the phrasing “an embodiment,” and the like, at the beginning of every sentence herein where logically possible and appropriate. 
         [0033]      FIG. 1  illustrates a perspective view of a structure where a cooling system is incorporated, representing one embodiment of the invention. Represented in  FIG. 1  is an evaporative cooling unit  100  which may be mounted on the roof of a structure  104 ; generally shown as a house in  FIG. 1 . A particularly designed roof mounting structure  101  securely holds the evaporative cooling unit  100  on the roof. There is represented, in one embodiment, a air vent  141  or a series of air vents  141  which functions to allow air to flow, from within the attic space  105  of the structure  104 , and subsequently expel into the atmosphere outside of the structure  104 . Also embodied is a refrigerated air cooling unit  103 , which functions to cool the living space  106  of the structure  104 . There is represented in  FIG. 1  the distinction between a living space  106  and an attic  105  space of the structure  104 . As illustrated, according to one embodiment, each space is a closed volume such that mixing of air does not occur. 
         [0034]    Further, it is envisioned, that the evaporative cooling unit  100  may be positioned in a variety of different locations upon, attached to, or beside the structure  104  to be cooled. One skilled in the art may select an appropriate position relative to the respective configuration of each structure. The evaporative cooling unit  100  may be AC powered, solar powered, gas powered, or powered by a combination of such forms of power. 
         [0035]    It is envisioned, that the refrigerated air cooling unit  103  may be located according to what may be preferred for energy efficiency, aesthetic appeal, and/or minimize noise and/or air flow nuisance. As such there are locations which may contribute to energy savings to the entire cooling system. The refrigerated air cooling unit  103  may be AC powered, solar powered, gas powered, or powered by a combination of such forms of power. 
         [0036]      FIG. 2  illustrates a front cross sectional view of the structure  104  shown in  FIG. 1 .  FIG. 2  shows a view of the structure  104  as would be seen if the front portion of the structure  104  were cut away, as indicated by the  FIG. 2-FIG .  2  cut line in the perspective view of  FIG. 1 . As shown, the evaporative cooling unit  100  is positioned on a portion of one side of the structures  104  roof. An example of such an evaporative cooler is the Alpine RW3000, AdobeAir, Inc., 1450 East Grant Street, Phoenix, Ariz. 85034. At this position it is likely to be in a minimally conspicuous location on the roof. The evaporative cooling unit  100  produces cooled air which is expelled into the attic  105  via an air distribution duct  200  and a distribution vent  201 . 
         [0037]    Further, in one embodiment, the air distribution duct  200  may be fixably attached to fully or at least partially encompass the outlet of the evaporative cooling unit  100 . The air distribution duct  200  extends from the outlet of the evaporative cooling unit  100  through an appropriately sized hole in the roof, and ends at some point just inside the attic  105  space. The interface between the roof material and the air distribution duct  200  is tight, being sealed and insulated with material know in the art for such purposes. In  FIG. 2 , the end of the air distribution duct  200  is disposed within the attic space and is fixably attached to the distribution vent  201 . The distribution vent  201  is configured such that the air passing through it may be channeled in selectable directions. The distribution vent  201  air flow directional surfaces are adjustable so that the direction of air flow may be optimized for each application. Such air distribution duct  200  and distribution vent  201  are sufficiently sized to allow free flow of cooled air from the evaporative cooling unit  100 . The air distribution duct  200  is comprised of materials and connected to attic  105  such that energy gain to the cooled air is minimized. Heretofore descriptions have set forth where and how the cooled air gets into the attic  105  space. 
         [0038]    As illustrated in  FIG. 2 , there is another potential embodiment of the invention. Specifically, the air in the attic  105  is monitored by various sensors that are modular or integral in nature and are located within a sensor housing module  210 . The sensors lend to the regulation of air flow and temperature of the attic  105  space through determining when activation or deactivation of the system is to occur. Such activation and deactivation occurs at the satisfaction of preset parameters. Additionally, besides setting the temperatures of operation of the evaporative cooling unit  100  via the thermostat  204 , operation may be terminated, continuous operation may be initiated, the current temperature may be monitored, as well as the fan may be independently operated. 
         [0039]    Additionally, there are represented, in  FIG. 2 , smoke detectors  202  positioned in various locations of the attic  105  for safety precaution. An example of such a smoke detector includes a battery operated model B224BI Plug-in Isolator Detector Base by System Sensor, 3825 Ohio Avenue, St. Charles, Ill. 60174. In  FIG. 2 , the smoke detectors  202  are fixably attached to the support members within the attic  105  space. One skilled in the art determines the appropriate locations for the smoke detectors  202  so as to comply with regulations, building codes and for optimal smoke detection. 
         [0040]    There is also represented, in  FIG. 2 , another embodiment, where a humidity sensor  203  located within the sensor housing module  210  which determines humidity level of the air within the attic space  105 . The humidity sensor  203  has an adjustable set point. When the humidity in the attic space  105  exceeds the pre-defined set point level, the water pump motor  213  in the evaporative cooler turns off. Conversely, when the humidity level in the attic space  105  drops below the pre-defined set point, the water pump motor  213  in the evaporative cooling unit automatically turns on. 
         [0041]    An example of such a humidity sensor system, U.S. Pat. No. 6,157,306, incorporated by reference herein, discloses a Humidity Sensing System for a Storage Container. According to one embodiment the humidity sensor  203  is located within the sensor housing module  210 . The sensor housing module  210  is attached to a support member within the attic  105  space. As illustrated in  FIG. 2  the location of the attachment is at a central point within the attic  105  space. 
         [0042]    There is also represented, in  FIG. 2 , a thermostat  204  located within the attic  105  to monitor the temperature therein. An example of a thermostat includes the GE RAK147D1 Remote Control Wall Thermostat, General Electric Company 3135 Easton Turnpike Fairfield, Conn. 06828. The thermostat  204  is integral or contained within the sensor housing module  210  or in another embodiment, the thermostat is fixably attached to support members within the attic  105 . As shown in one embodiment in  FIG. 2 , the location of the sensor housing module  210  is mounted in the upper most points of the attic  105 . Hot air being less dense than cool air will rise to the higher sections of the attic  105 . It may be desirable to monitor the hotter areas of the attic  105  space. The sensors contained within the sensor housing module  210  are in communication by electronic wire  214  with the evaporative cooling unit control mechanism  212 . In one embodiment, such feedback communication is used determinatively by the evaporative cooling unit control mechanism  212  to activate, continue or deactivate cooling cycles. 
         [0043]    According to one embodiment, all mentioned sensors and feedback devices are intended for the safe and efficient operation of the evaporative cooling system  100  to thereby provide a safer environment in the attic  105 . The sensor housing module  211  and the location thereof is determined specifically for each structure. 
         [0044]    As illustrated in  FIG. 2 , the evaporative cooling unit  100  distributes cooled air into the attic space  105  via the air distribution duct  200  and the distribution vent  201 . Located within the attic  105  with the evaporative cooling unit  100  there may be at least one air vent  141  which expels air from the attic  105  space into the atmosphere outside the structure  104 . The air vents  141  are of sufficient size to accommodate the flow of air out of the attic space  105 . The air vent may be automatically controlled to open and close via automatic controls using an associated motor in coordination with the operation of the control sensors in the sensor control housing  210 , which is not illustrated in its entirety since one skilled in the art would easily understand its operation and design. 
         [0045]    Additionally, illustrated in  FIG. 2  is a refrigerated air cooling unit  103  which distributes cooled air into the living space  106  of the structure  104 . An example of such a refrigerated air cooling unit includes, U.S. Pat. No. 7,003,976, incorporated by reference herein, discloses an Air Conditioner. As illustrated in  FIG. 2  in one embodiment the cooled air flows from the refrigerated air cooling unit  103  through an air conditioning duct  208  and is distributed at various locations via air conditioning vents  209  which are conveniently and strategically placed throughout the living space  106  of the structure  104 . 
         [0046]    In one embodiment the air conditioning duct  208  is fixably attached to the location of cool air output from the refrigerated air cooling unit  103 . As illustrated in  FIG. 2 , the air conditioning duct  208  extends vertically from the connection at the refrigerated air cooling unit  103  until it reaches an uppermost position where it make a 90 degree tum such that it travels through a hole in the structure  104  wall to enter therein. As further illustrated, once the air conditioning duct  208  is within the structure  104  so as to be inconspicuous from the living space  106  the air conditioning duct  208  travels through the lowermost part of the attic  209  to thereby channel the cooled air to various locations for appropriate distribution into the living space  106 . According to one embodiment, the portion of the air conditioning duct  208  that is within the attic  105  is fixably attached to support members therein, so as to be immoveable. 
         [0047]    As further illustrated in  FIG. 2 , there are points along the air conditioning duct  208  where air conditioning vents  209  are attached thereto. In one embodiment the air conditioning vents  209  are fixably attached at holes in the air conditioning duct  208  to allow for flow of cool air from the same to a location within the living space  106  of the structure  104 . The air conditioning vents  209  are adjustable so as to allow direction and flow modulation of the cooled air. 
         [0048]    In operation the refrigerated air conditioning unit  103  and associated distribution means,  208  and  209 , are exclusive from the evaporative cooling unit  100 . Keeping the evaporative cooling system exclusive from the refrigerated cooling system provides for better cooling of the entire structure  104  as well as eliminates the nuisance, in the living space  106 , incumbent with humidified cooling systems such as dust and mold. The present invention does not intend to modify the hardware or embodiment of current refrigerated cooling systems present in homes. The present invention is intended to improve the operation of such air conditioning systems, by adding an evaporative cooling system for an attic. The transfer of heat from the atmosphere through the attic space  105  into the living space  106  depicted by the squiggly arrows  220 . In operation, heat is transferred from the hot outside atmosphere into the cooled living space  106 . This transfer of heat happens in three simultaneous phases. First, heat passes through the roof of the structure  104 . This transfer of heat occurs by means of “conduction” from the outer surface of the roof  221  to the inter surface or attic side of the roof  222 . Secondly, and simultaneously, the heat from the inner roof surface  222  is transferred through the air in the attic space  105  to the lower horizontal surface of the attic  223 , by method of “convention”. Thirdly, and also simultaneously, the heat from the lower the attic structure  223  is transferred through the living space ceiling structure into the living space  106  via “conduction”. 
         [0049]    In order to offset this warming of the living space caused by the infiltration of the hot outside temperature into the living space  106 , and in order to maintain a comfortable temperature within the living space  106 , a supply of cool air must be provided for the living space  106  via the refrigerated air-conditioning unit  103 . As the hot outside temperature is transferred into the living space  106 , as previously described, there also exists another method of energy loss which also reduces the effectiveness or efficiency of the refrigerated air-conditioning unit  103 . Simultaneous to the transfer of heat from the attic space  105  through the ceiling into the living space  106 , heat is also being transferred from the attic space  105  through the air-conditioning duct  208  into the refrigerated air stream  258 . 
         [0050]    In operation, the evaporative air conditioning unit  100  cools the attic space  105  which directly reduces the transfer of heat through the air conditioning duct  208  into the air stream  258 , thus increasing the efficiency of the distribution of the refrigerated air into the living space  106 . In one embodiment of the invention, it is intended that the evaporative cooling unit  100  keep the attic  105  temperature between selected temperature limits, such as 85-95 degrees Fahrenheit. In one embodiment the thermostat  204  provides feedback to the evaporative cooling unit  100 , such that when a selected maximum temperature is reached the evaporative cooling unit  100  is activated to send cooled air into the attic  105 . In operation, according to one embodiment, when some lower temperature limit is reached the cooling stops. 
         [0051]    Additionally, the sensors incorporated into the cooling system may also govern its operation. According to one embodiment, when the smoke detectors  202  sense smoke in the attic  105  space a signal is communicated to the evaporative cooling unit  100  which triggers shut down of evaporative cooling unit  100   
         [0052]    Also shown in  FIG. 2  is another embodiment of the invention that incorporates the two benefits, previously described. First, there is a benefit of reducing the rate at which heat is transferred directly into the living space  106 . Second, there is a benefit of reducing the energy gain to the air stream  258  that is transferred through the air conditioning ducts  208  before it is the cool air is expelled from the air conditioning vents  209  into the living space  106 . Reducing the energy gain, or heat transfer to the ducts, ultimately reduces the energy necessary to cool the living space  106  of the structure  104 . 
         [0053]    It is understood that the above-described embodiments are only illustrative of the application of the principles of the present invention. The present invention may be embodied in other specific forms without departing from its spirit or essential characteristics. The described embodiment is to be considered in all respects only as illustrative and not restrictive. The scope of the invention is therefore, indicated by the appended claim rather than by the foregoing description. All changes which come within the meaning and range of equivalency of the claims are to be embraced within their 
         [0054]    Thus, while the present invention has been fully described above with particularity and detail in connection with what is presently deemed to be the most practical and preferred embodiment of the invention, it will be apparent to those of ordinary skill in the art that numerous modifications, including, but not limited to, variations in size, materials, shape, form, function and manner of operation, assembly and use may be made, without departing from the principles and concepts of the invention as set forth in the claims.