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Ships within 48 hours · Estimated delivery Aug 10 - Aug 15
SD34 Series Performance Data
3 hour fire resistance rating
NGD - Narrow ceiling grid dimples for 9/16" T-Rails
w/ Steel Opposed Blade Damper
Standard Features * Adjustable curved blade
4" Horizontal/Vertical Mount Fire Damper 2634-40X8 Residential Registers & Grilles SD34 Series Performance Datah3. 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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