Lennox 25W74 Manifold 322056-301 or a loud rattling noise

or a loud rattling noise

B terminal designations and included decorative cover plate simplify professional HVAC thermostat installation by hiding existing wall marks

Built with a durable zinc body and high-quality Buna-N seals

Replacing a warped or corroded furnace airflow component with this factory-authorized part ensures long-term reliability and peak heating capacity

It serves as a drop-in replacement for legacy part numbers 101235-31

Lennox 25W74 Manifold 322056-301 or a loud rattling noiseThe Lennox 25W74 Gas Manifold (OEM part number 100795 01) is a precision engineered gas distribution component designed for high efficiency residential and light commercial furnace burners. As a critical point of regulation, this manifold ensures localized gas pressure is balanced across all burner tubes, facilitating consistent ignition and optimal combustion cycles. Built with heavy duty materials to withstand thermal stress and pressure