Burner with variable secondary air controller

Abstract From the Canadian patent

Abstract, A housing having an atmospheric air inlet with a baffle separating the housing into a primary air inlet chamber and a combustion chamber. A main burner and a pilot burner extend through the baffle with their metering devices positioned in the primany air chamber and their burner tips positioned in the combustion chamber. A variable air controller for controlling secondary air includes a valve positioned between ambient air and the combustion chamber and controls the amount of secondary air in response to the fuel pressure.