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Ships within 48 hours · Estimated delivery Aug 12 - Aug 17
For evaporative coolers or central blower systems
Retainer cables are provided on sizes 12" and larger to allow the inner cones to hang securely while adjusting the diffuser
Blades are parallel to the shortest dimension
1 1/2 hour fire resistance rating
4 1/4" Vertical Mount Fire Damper 2633-48X22 Residential Registers & Grilles For evaporative coolers or centralh3. Standard Features * 2633 Square or rectangular out of airstream fire damper for vertical mount only. * 2634 Square or rectangular Spring actuated (6) out of airstream fire damper for horizontal or vertical mount. * UL and California State Fire Marshall approved * 4 1 4" standard frame style * Maximum dimension 60w, 52h * Interlocking steel roll formed blade (3) with roll formed frames (1) * Blade lock (5) * Damper manufactured from corrosion
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