Fresh Air Dampers

FAMCO Fresh Air IAQ ECONOMIZER Call for price View Product >>
FAMCO Residential Fresh Air Economizer. Advanced Diagnostic & System Controller. Auxiliary IAQ Equipment & Control options. Ready to install.
REVERSIBLE BACKDRAFT DAMPER with Wall Vent Price: $37.08 View Product >>

FAMCO Reversible Back Draft Butterfly Damper with Wall Vent. Reversible Air Flow direction - Air Intake or Exhaust. Galvanized or Aluminum Vent. 4" thru 12" Duct.   
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Tjernlund FRESH AIR Fan Powered Intake Price: $146.85 View Product >>
Tjernlund FAI4 Fan Powered FRESH AIR Intake. Includes Exterior Wall Vent Hood and Intake Fan in Connecting Collar with Power Plug.  Rated 75 CFM.