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Tool Operated Opposed Blade Damper
Driftwood Tan or Soft White
Adjustable modular cores with fixed curved blades
Adjustable aluminum airfoil blades oriented for 1 or 2 way airflow pattern
Standard Features * 2561 - Square or rectangular fire door for vertical mount only
4" 3 Hour Vertical Mount Fire Door 2661-30X16 Accessories Tool Operated Opposed Blade Damperh3. 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"
