it is designed to withstand higher internal temperatures in demanding hydronic heating and cooling environments

Optimized Airflow: Restores factory-spec static pressure and cooling efficiency across the evaporator coil

Featuring a 200 MOP (Maximum Operating Pressure) and flowrator functionality

and G775RHA-2 models

Precise Thermal Calibration: Factory-set for a 110-170F temperature range to ensure tight adherence to system safety parameters

Lennox 79L57 Orifice 319848-301 it is designed to withstandThe Lennox 79L57 is a critical Natural Gas Burner Orifice engineered specifically for high efficiency Lennox gas furnaces and heating units. This genuine OEM replacement part is precision machined to deliver an exact BTU output by regulating the volumetric flow of natural gas to the burner assembly. Using a Lennox 79L57 Orifice ensures your manifold pressure aligns with factory specifications, preventing issues like incomplete combustion, soot