The Resideo VR8305M2102/B Combination Redundant Gas Valve is a gas control component designed to regulate fuel flow in compatible gas-fired HVAC equipment. It uses integrated redundant safety valves to control the supply of natural gas to the burner, opening and closing in response to the heating system’s control signals. This valve is commonly used with compatible furnaces, boilers, ... https://www.partshnc.com/resideo-vr8305m2102-b-3-4-redundent-gas-valve-comb