barometric damper

barometric damper

An automatic adjustable device for regulating the draft through a fuel-burning appliance, thereby making operation of the appliance nearly independent of the chimney draft over its normal range of operation.
References in periodicals archive ?
The only way to safely vent one of these gas hot water heaters is to modify the appliance by connecting the chimney to the appliance and incorporating a barometric damper.
A round duct with barometric damper was discussed during construction and is still being tossed around, although the owner is not yet toasted, and 350[degrees], the Schalls would attest, is a gross exaggeration.