even in systems with high-impedance anticipator-type thermostats

This unit features standard 1/4-inch quick-connect terminals for streamlined field installation and is a direct drop-in for several obsolete or superseded models

Optimal Combustion: Designed to maintain the correct venturi vacuum for a stable natural gas burner flame

System Calibration: Essential for HVAC professional tuning to ensure optimal combustion efficiency and reduced carbon monoxide risk

Reznor 38678 Orifice even in systems with high-impedanceThe Reznor 38678 #45 Nat Gas Orifice is a high precision combustion component designed for accurate fuel delivery in specific gas fired HVAC heating equipment. As an OEM replacement orifice, it ensures the correct natural gas flow rate to the burner, which is critical for maintaining optimal combustion efficiency and consistent BTU output. This #45 drill size orifice is engineered to meet the exact tolerances required for Reznor unit heaters and duct