this 1183488 control knob utilizes a reinforced black plastic construction to withstand high-cycling demands and mechanical stress

Designed to withstand the corrosive environment of secondary heat exchanger condensate

and 5-125 PSI for light oil

As the direct replacement for the legacy 5H58621-4

Is this heat exchanger compatible with high-efficiency 90%+ AFUE furnaces

Reznor 150840 Gas Valve 320734-701 this 1183488 control knob utilizesThe Reznor 150840 is a high performance 3 4" LP Gas Valve engineered specifically for technical replacement in commercial and industrial propane heating systems. As a genuine OEM Reznor gas valve, this unit ensures precise liquid propane fuel regulation, maintaining exact manifold pressure for optimal combustion and thermal efficiency. Designed for rugged service, it operates as a direct unit heater replacement part for compatible Reznor furnace