4" 3 Hour Vertical Mount Fire Door 2661-24X24 Smoke-Fire Damper sizes T-20 Tamper Proof Screws

sizes T-20 Tamper Proof Screws SUBMITTAL 903 Series Submittal PERFORMANCE DATA 903 Series Engineering/Performance Data REVIT FILES Surface Mount Aluminum Supply Diffuser Double Deflection front Long with Damper Surface Mount Aluminum Supply Diffuser Double Deflection front Long

with 54% free area

SD52 - Transition Box Spiral Pipe Grille (Single Deflection)

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

4" 3 Hour Vertical Mount Fire Door 2661-24X24 Smoke-Fire Damper sizes T-20 Tamper Proof Screwsh3. 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"