3 Hour Out Of Air Fire Door Grille 2663-20X20 Accessories Blades are parallel to the

Blades are parallel to the longest dimension

055 T6 extruded aluminum * Square collar * For 22"x22" square duct * Soft White Options * 915 T O - opposed blade damper * No Labor Collar - square to round (2x2 only) * 1x2 panel (10"x22" duct) or 2x4 panel (22"x46" duct) * Satin Anodized Finish available on this product

Plated Metal or Wood Finish available on this product

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

T-Bar Modular Core Diffuser with Round Collar 6-14

3 Hour Out Of Air Fire Door Grille 2663-20X20 Accessories Blades are parallel to theh3. Standard Features * 2661 Square or rectangular fire door for vertical mount only. Maximum dimension 60x60. For damper free area chart A click here * 2663 Out of Airstream fire door. Square or rectangular for vertical mount only. Maximum dimension 60w x 52h. For damper free area chart B click here * 2665 Round fire door for vertical mount only. Available 4" thru 52" round. * 3 hour rated * UL and California State Fire Marshall approved * 4 1 4"