Abstract: A power oil or gas burner having a centrifugal blower that includes a standardized production scroll housing. Within the space available in the scroll housing a narrow-width, large (maximum) diameter squirrel cage rotor is provided, that is offset away from the air inlet ring of the blower. In combination with a scroll extension carried by the housing and disposed adjacent the rotor, the invention provides a unique barrier wall member that is mounted in the housing and extends within the squirrel cage rotor, such barrier member providing for a more stable flow of air at higher static pressures and higher capacity that was previously attainable, and reducing whine and whistle from the blower operation.

Abstract: A forced-draft gaseous pre-mix power gas burner having a shaped and perforated burner plate wherein the hole sizes are related to the plate thickness and the holes are formed in a unique pattern, all of which prevent flashback and noise or screech while at the same time flame stability is greatly improved. The burner plate is easily installed and removed, is essentially free from stresses which would distort it, and readily fits positively and accurately within the burner assembly without resorting to welding or other special fasteners. A novel ignition-improving device for effecting a stagnant flow at the ignition arc location provides for quick and reliable ignition of the gas at all times.