ports 2 and 3 are connected and port 1 is blocked

and Comfortmaker heat pumps and air conditioners

The Q314A6102 features a right-hand (K-style) tip direction

This specific model features an 8 to 13 psi spring range

Lennox 33H63 Flange 320735-701 ports 2 and 3 areFor veteran technicians maintaining residential or commercial exhaust systems, the Lennox 33H63 Smoke Collar Flange is a critical OEM replacement part designed to ensure a high integrity connection between the smoke collar and HVAC ductwork. This heavy duty furnace venting component is engineered from galvanized steel, providing essential resistance to high temperatures and corrosive flue gases. As a Lennox replacement flange (also identified by part