If the blower fails to modulate or results in a blocked flue error

Enhanced Equipment Safety: Designed to prevent catastrophic heat damage to furnace components and surrounding structures

this is the "less flange" model (VLF)

selecting the correct Sensus 243-12-2 or 243-8-2 orifice size is essential to prevent hunting and ensure stable downstream pressure

Designed for direct-fit compatibility with York HVAC units and commercial-grade air handlers

Resideo VR8205Q2555 Valve 323269-701 If the blower fails toThe Resideo VR8205Q2555 is a high performance 1 2" dual automatic combination gas valve engineered specifically for two stage gas furnaces utilizing direct spark ignition (DSI) or hot surface ignition (HSI) systems. This 24VAC gas valve features a standard opening profile with a dual stage regulator factory set at 1. 7" W. C. for low fire and 3. 5" W. C. for high fire. With a flow capacity ranging from 20 to 200 CFH and a 0. 5 PSI pressure rating, it