Opposed Blade Volume Damper 3000-0BD-46X44 Step Down Ceiling Diffuser 055 T6 extruded aluminum *

055 T6 extruded aluminum * Five air patterns: 700 CB10 - one way

Standard Features * 2533 - Square or rectangular for vertical mount only

Standard Features * 2561 - Square or rectangular fire door for vertical mount only

Uniform 360 degree discharge pattern

For damper free area chart A click here * 2563 - Out-of-Airstream fire door

Opposed Blade Volume Damper 3000-0BD-46X44 Step Down Ceiling Diffuser 055 T6 extruded aluminum *h3. Standard Features * Opposed blade operation for precise volume control * 16 gauge galvanized channel frame * Blades are vee stiffened 16 gauge galvanized for strength and stability * Blades pivot on non metallic celcon bushings * 1 2" square zinc plated steel pivot pins * 1 2" square zinc plated steel adjustable operating shaft extending up to 4" beyond the air control frame * Single blades on dampers with a height of 12" or less * Mill finish h3.