barometric draft regulator

barometric draft regulator

[bar·ə′met·rik ′draft reg·yə′lād·ər]
(mechanical engineering)
A damper usually installed in the breeching between a boiler and chimney; permits air to enter the breeching automatically as required, to maintain a constant overfire draft in the combustion chamber.

barometric draft regulator

A damper usually installed in the breeching between a boiler and chimney; permits air to enter the breeching automatically as required, to maintain a constant overfire draft in the combustion chamber.