**SPECIAL SPECIFICATION**

**SECTION 15910**

**[AIR DEVICES]{.underline}**

[Page]{.underline}

PART 1 - GENERAL

1.01 Work Included 2

1.02 Related Work 2

1.03 Cooperation With Other Trades 2

1.04 Submittals 2

1.05 Finishes 3

PART 2 - PRODUCTS

2.01 Acceptable Manufacturers 3

2.02 Diffusers 3

2.03 Registers 4

2.04 Accessories 4

2.05 Louvers 5

2.06 Intake Hoods - Roof Mounted 6

2.07 Vav (Variable Air Volume) Terminal Units 6

PART 3 - EXECUTION

3.01 Inspection 7

3.02 Installation 7

**SPECIAL SPECIFICATION**

**SECTION 15910**

**[AIR DEVICES]{.underline}**

[PART 1 - GENERAL]{.underline}

1.01 [WORK INCLUDED]{.underline}

> This section provides for the furnishing and installation of air
> distribution devices, including grilles, diffusers, registers,
> dampers, extractors, louvers, and VAV (Variable Air Volume) Terminal
> units.

1.02 [RELATED WORK]{.underline}

A. [Division 15 - Mechanical]{.underline}

1\. Ductwork Systems, Section 15890.

2\. System Component Check and Balance, Section 15901.

1.03 [COOPERATION WITH OTHER TRADES]{.underline}

> Coordinate this work with work under Division 16 - Electrical, to
> ensure that intended functions of lighting and air systems are
> achieved.

1.04 [SUBMITTALS]{.underline}

> Submit product data for outlets, grilles, registers, control devices,
> louvers, and similar equipment for review prior to placement of
> purchase order.

1.05 [FINISHES]{.underline}

> Paint exposed devices with factory standard prime coat, or factory
> finish coat, as specified or shown on drawings.

[PART 2 - PRODUCTS]{.underline}

2.01 [ACCEPTABLE MANUFACTURERS]{.underline}

A. Titus.

B. Krueger.

C. Metalaire.

D. American Warming.

E. Greenheck.

F. Ruskin.

G. Trane. (VAV Terminal Units)

2.02 [DIFFUSERS]{.underline}

A. [Louvered]{.underline}. Provide louvered, fixed-pattern,
multiple-cone diffusers with removable center cone, frames and white
factory finish.

1\. Select faces and necks that are circular, rectangular or square, of
the size and configuration indicated.

2\. Construct diffusers and frames of aluminum or steel.

3\. Use a frame compatible with the type of ceiling in which the
diffuser is installed.

B. [Perforated]{.underline}. Provide adjustable-pattern, aluminum
diffusers and frames with white factory finish. Frame the diffuser face
with a mitered and welded frame fitted with controllers of adjustable
pattern.

C. [Dampers]{.underline}. Furnish an opposed-blade damper easily
adjustable through the outlet. Provide operating rod extensions as
required for damper adjustment.

2.03 [REGISTERS]{.underline}

A. [Supply]{.underline}. Provide double-deflection supply registers with
aluminum or steel, vertical face blades and horizontal rear blades. Use
an integral, key-operated, opposed-blade damper.

1\. Furnish solid, extruded aluminum blades which are individually
adjustable. Space not more than 3/4-inch centers for rear blades and
1/2-inch centers for face blades and not less than 5/8-inch deep.

2\. Employ grille frames of extruded aluminum with welded and mitered
corners and mounting gaskets.

B. [Return and Exhaust]{.underline}. Furnish return and exhaust
registers identical to return grilles except for the addition of an
integral key-operated, opposed-blade damper.

2.04 [ACCESSORIES]{.underline}

A. [Supply Grille Extractors]{.underline}. Provide each supply grille
with an air control device capable of positively regulating the volume
of air extracted from the supply duct.

1\. Select extractors similar to Titus Model AG45, tight-closing in the
minimum position. Include a key-operated or worm-gear adjusting
mechanism to facilitate positioning from the grille opening. Where
adjustment is not accessible at the grille opening, provide a control
rod equipped with a locking quadrant.

2\. For ductwork control, use Young regulators. Provide extractors 30
inches and longer with a support rail inside of the duct at the outboard
quarter point of the extractor. Construct the support rail of angle or
channel members formed of sheet metal fastened securely to the duct.
Make the rails 18 inches long, except where duct width prevents the
extractor from sagging when moved toward its maximum position.

3\. Check extractors thoroughly for freedom of operation. If necessary,
oil bearing points before installing.

B. [Mounting Frames]{.underline}. Provide each grille or register not
equipped with a removable core with a companion, all-purpose mounting
frame constructed like a grille frame to facilitate installation and
removal of the grille or registerer without marring adjacent mounting
surfaces.

1\. Furnish frames with 1/2-inch thick sponge rubber gasket to prevent
air leakage.

2\. Provide a frame that neatly fits the grille. Mounting frames will
not be required for grilles or registers mounted directly on exposed
ductwork.

2.05 [LOUVERS]{.underline}

A. Furnish and install where shown on drawings and similar to American
Warming and Ventilating, drainable extruded aluminum stationary louvers.
Frame shall be a 4\" deep, channel or flanged, and .081\" thick 6063-T5
extruded aluminum alloy. Blades shall be made of .081\" thick 6063-T5
extruded aluminum alloy, be fixed 45° angle, and of the drainable type.
Screen shall be provided on the interior, be removable for cleaning, and
consist of 1/2\" expanded aluminum with extruded aluminum frame. Finish
louver shall be Amergard enamel paint color to match exterior existing
wall system of building.

B. Louver shall pass a maximum free area velocity of 1054 fpm with less
than .19 inc. w.g. pressure drop and carry less than .01 ounces of water
per square foot of free area during a 15 minute period based on tests
and procedures performed in accordance with AMCA Publication 511 and
comply with the requirements of the AMCA Certified Ratings Program,
effective November, 1990.

2.06 [INTAKE HOODS - ROOF MOUNTED]{.underline}

A. Furnish and install intake roof hoods as scheduled and shown on
drawings. Hood construction shall be aluminum sheets with rolled
interlocking seams for reinforcement. Units shall have galvanized steel
hood support members for rigidity. The units shall have 1/2 x 1/2-inch
galvanized birdscreen. Units with throat dimensions of 36 x 48 inches or
less shall have hinged hoods to allow for each access to dampers,
filters and ductwork.

B. Bases shall be heavy gauge aluminum construction twelve inches high.

C. Roof hoods shall be similar to Pennhouse series as manufactured by
Penn Ventilator Co.

2.07 [VAV (VARIABLE AIR VOLUME) TERMINAL UNITS]{.underline}

A. [Parallel]{.underline} - Intermittent fan operation.

B. [Series]{.underline} - Constant fan operation.

C. [Casing]{.underline}. 22 gauge galvanized steel, internally lined
with 1/2\" insulation for acoustical and thermal properties. Insulation
shall not breed or promote fungi or bacteria, shall resist mold growth,
shall not rot or sustain vermin.

D. [Access Panel]{.underline}. Entire bottom panel of casing to be
removable for air valve and fan access.

E. [Primary Air Valve]{.underline}. Cylindrical flow control device with
integral electric activator. Die-cast aluminum. Integral multiple point
averaging flow sensing ring for primary air measurement/control.

F. [Fan]{.underline}. Forward curve style fan wheel.

[Motor]{.underline}. Permanently lubricated, three speed permanent split
capacitor, thermal overload protection.

G. [Fan Speed Control]{.underline}. 3-speed, factory mounted with
adjustment knob external to control panel.

H. [Hot Water Coil]{.underline}. Factory mounted, 1 or 2 row, mounted on
plenum inlet, 150 FPF, aluminum fins with copper tubes. Factory mounted
electric control valve package.

I. [Control Panel]{.underline}. Factory mounted, electronic (non-DDC).

[PART 3 - EXECUTION]{.underline}

3.01 [INSPECTION]{.underline}

> Do not install ceilings adjacent to fixtures until installation of
> fixtures, air supply assemblies, return-air blank-off strips and
> flexible duct have been properly approved. Remove and reinstall any
> part of the installation found incorrect.

3.02 [INSTALLATION]{.underline}

> A. [Diffusers]{.underline}. Louvered diffuser outlets mount tight
> against the ceiling. Fasten outlets securely to ductwork with sheet
> metal screws. For perforated diffusers, attach the frame assembly by a
> concealed hinge assembly to an outer frame compatible with the type of
> ceiling on which the diffuser is installed.

END OF SECTION