4 1/4" Vertical Mount Fire Damper 2633-30X8 Smoke-Fire Damper Double deflection surface mount grille

Double deflection surface mount grille with adjustable airfoil blades

with 54% free area

Spiral Diffuser Radius Flush Mount Diffuser Single Deflection with Damper

Retainer cables are provided on sizes 12" and larger to allow the inner cones to hang securely while adjusting the diffuser

4 1/4" Vertical Mount Fire Damper 2633-30X8 Smoke-Fire Damper Double deflection surface mount grilleh3. 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