Abstract: The invention is a blower assembly for a packaged climate control unit such as a packaged air conditioning or heating unit. An orifice ring for receiving and guiding rotation of a blower wheel of the assembly is made detachable so that the wheel can be inserted into and retrieved from the top of the blower assembly housing. Further, the blower assembly may comprise an improved motor stand having vertically oriented pegs which are received by receptacles formed about the outer surface of the motor. When the assembly is installed in packaged unit having a detachable top section, both the blower wheel and the blower wheel motor can be retrieved from the packaged unit for servicing or replacement without removing the blower assembly housing from the packaged unit.

Abstract: A porous silicon carbide insert is located in the burner and defines the burner head. This provides a larger area for the flame to attach to the burner head since the porous insert causes the gas/air mixture to flow from the entire burner head. A more stable flame results and the flame is unable to travel back into the burner venturi through the insert.

Abstract: A porous, ceramic member defines both the burner and baffle. Gaseous fuel is supplied under pressure into a chamber and flows through the ceramic member and, in flowing, causes the aspiration of atmospheric air into the flowing gaseous fuel. The air-fuel mixture is ignited a short distance downstream of the chamber and the flame flows through the ceramic member and emerges from the ceramic member within the heat exchanger. The air mixing with the gaseous fuel causes turbulence and mixing of the gas and cools the flame prior to its reaching temperatures associated with the generation of thermal NO.sub.x.