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Ships within 48 hours · Estimated delivery Aug 14 - Aug 19
Maximum single section size 24"x24"
2550 Series Engineering/Performance Data
listed Fire-Resistance Diffuser * TVB - Thermal Vapor Blanket * Square collar
listed Fire-Resistance Diffuser * TVB - Thermal Vapor Blanket * Square collar Additional Drawings * 825 MA
For evaporative coolers or central blower systems
4" 3 Hour Vertical Mount Fire Door 2661-60X40 Step Down Ceiling Diffuser Maximum single section size 24"x24"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"
