(800)865-5931 Mon-Fri 8am-7pm, Sat 9am-2pm, CT
AMERICA'S HEATING & COOLING STORE™
EST. 2002
Home Air Products™
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(800) 865-5931

Mon-Fri 8am-7pm, Sat 9am-2pm, CT

A backdraft damper prevents outdoor air from coming into the house when it is not wanted.  It installs between your Honeywell DH90 and your furnace or air handler if you are taking advantage of the DH90's Fresh Air Ventilation feature.