4" 3 Hour Vertical Mount Fire Door 2661-36X18 Step Down Ceiling Diffuser 1 for each end)

1 for each end)

UL listed and tested in accordance with UL Standard 555

with color matching Phillips Pozidriv screws

Standard Features * Flush modular curved blade T-Bar diffuser * Curved blade cores sit flush with face for more uniform air flow * Movable cores provide multiple fixed air patterns * 6x6 thru 14x14 diffuser sizes * Square to round No Labor Collar * 2x2 galvaneal steel panel with seismic support holes * Soft White Options * 700MCB O - opposed blade damper * TVB - Thermal Vapor Blanket * Square collar

14" and 16" Options * Field installable Bowtie Damper (BD) * HL OR - factory installed opposed radial damper (sizes 6"-14") * HL FR - U

4" 3 Hour Vertical Mount Fire Door 2661-36X18 Step Down Ceiling Diffuser 1 for each end)h3. 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"