can somebody help me understand why a retrofit of a gas power burner into my peerless WBV-04 oil boiler requires the installation of a "barometric damper"?
the damper i have now is installed in a T, and flaps in on a strong draft.
apparently it needs to be replaced with one that flaps out as well as in.
why in the world would i want the damper to flap out into my house???
wouldn't that mean that exhaust is entering my house?