Round Aluminum Air Louver 4901-IS-4

Round Aluminum Air Louver 4901-IS-4Standard Features * Lightweight Aluminum vent louver * Able to withstand wet and corrosive environments * Spring clip mounting * Easily installed using only a high grade silicon caulk * Satin Anodized finish Options * IS Insect screen * Standard Color or Designer Color Finish available on this product

UL listed and tested in accordance with UL Standard 555C

Full-length screwdriver operated Scoop Extractor

2" ADC compliant round collar with a bead for ease of installation

Standard collar diameter is the same as the diffuser size

Lever operated Opposed Blade Damper

Soft white

Standard Features * Solid aluminum rotatable body * Excellent for spot heating and cooling difficult areas * Can move conditioned air from an inaccessible place to the work environment * Precision adjustable aluminum air flow exit plate * Double felt flange body seal to prevent air leakage * Closed cell neoprene felt mounting gasket * Easy adjustment of air flow by turn of a knob * Maximum rotation angle 33 to 42 in all directions * Corrosion resistant anodized finish Options: * 1205 - spot diffuser in panel mount

1x2 T-Bar (8" x 20" duct)

Standard Features * T-Bar lay-in filter grille with steel removable perforated face * 3/16" holes on 1/4" staggered centers * 20" x 20" x 1" filter (not included) * Square collar for 20 x 20 duct * 2x2 galvaneal steel panel with seismic support holes * Soft White Options * Square to round No Labor Collar

Standard Features * Fixed blade return air T-Bar lay-in filter grille * Square collar for 20 1/2" x 20 1/2" duct * Hinged removable face * 20" x 20" x 1" filter (not included) * Seismic support holes * Soft White Options * 920 TFG - steel outer frame * 920 2 TFG - 2" filter spacing (filter not included) * No Labor Collar - square to round (2x2 only) * 1x2 (20x8 filter) or 2x4 (20x44 filter) * Satin Anodized Finish available on this product

Performance Data

Nylon bushings on adjustable blades prevent metal on metal rattle