the "/U" suffix simply denotes a trade-packaged version

always verify the part number against your specific equipment's data plate

meaning the logic module is integrated and flashed with the specific performance curves required for compatible York hardware

reducing labor time during field replacement and ensuring a bolt-on installation

Common Questions Is the Sporlan 470066 compatible with R-410A systems

Lennox 28W44 Flue 323269-701 the "/U" suffix simply denotesThe Lennox 28W44 Flue Exhaust Tee is a critical OEM replacement part designed for precision venting in high efficiency gas furnaces. Engineered from rugged steel, this flue assembly ensures the safe and streamlined redirection of combustion gases, maintaining the atmospheric integrity of the heat exchanger circuit. As a veteran grade HVAC exhaust component, the 28W44 is built to withstand high temperature cycles without structural degradation or seal