4 1/4" Vertical Mount Fire Damper 2633-28X28 Specialty Products Spiral Diffuser Radius Flush Mount

Spiral Diffuser Radius Flush Mount Diffuser Single Deflec

2" ADC compliant round collar with bead for ease of installation

*Note: Ceramic fiber blade insulation is not UL required on dampers with free areas less than 80 square inches

Perforated Face Grille

Surface mount fixed blade grille with airfoil blades at 0°

4 1/4" Vertical Mount Fire Damper 2633-28X28 Specialty Products Spiral Diffuser Radius Flush Mounth3. 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