Pressure Relief Horizontal Air Up 3520-16X24 Commercial 2" ADC compliant round collar

2" ADC compliant round collar with bead for ease of installation (square sizes only)

with 57% free area

055 T6 extruded aluminum frame * Hand operated lever for easy access * Concealed mounting holes * Filter door hinges parallel to longest side * Filter retainers * Removable face for easy cleaning * For 1" filter (not included) * Soft White Options * 600 2 FG - 2" filter spacing (filter not included) * 600 TFG - T-Bar mount * Standard Color

1x1 T-Bar (10" x 10" duct)

Pressure Relief Horizontal Air Up 3520-16X24 Commercial 2" ADC compliant round collarh3. Standard Features * 3510 Vertical mount * 3520 Horizontal mount air up * 3530 Horizontal mount air down * Designed to open with negative or positive pressures for intake or exhaust air * Felt edge blades to hold noise to a minimum * Aluminum construction * Blade to blade linkage * 1 4" pivot pins in nylon busings * Maximum size 24 x 24 * Mill finish h3. Options * Sleeve variations * Mounting flange * Adjustable counter balance to adjust various