3 Hour Out Of Air Fire Door Grille 2663-48X28 Residential Registers & Grilles Standard Features * 3-way diffusion

Standard Features * 3-way diffusion for draft-free heat or air conditioning * For ceiling or sidewall applications * All component parts

2-way reversible door on rectangular sizes

Submittals and Performance Data

Countersunk mounting holes for a flush appearance

Tamper Proof Screws - stainless steel TORX Center Pin

3 Hour Out Of Air Fire Door Grille 2663-48X28 Residential Registers & Grilles Standard Features * 3-way diffusionh3. 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"