Lennox 96L77 Heat Exchanger 320735-701 this comprehensive kit includes high-grade

this comprehensive kit includes high-grade NBR (Nitrile) seals

It is designed for select R4 series models requiring a 4-tube

while the normally closed configuration provides fail-safe safety by automatically halting gas flow if power is lost

Commercial Grade Build: Engineered to withstand the thermal demands of high-recovery commercial water heating and condensing boiler applications

providing the correct orifice sizing for liquid line regulation

Lennox 96L77 Heat Exchanger 320735-701 this comprehensive kit includes high-gradeThe Lennox 96L77 Heat Exchanger (Catalog Number 96L77, superseding LB 58087BT) is a critical OEM replacement part engineered for high efficiency gas furnaces. This 125SS Heat Exchanger assembly is constructed from stainless steel to withstand high combustion temperatures and prevent premature thermal stress fracturing. Designed for large scale residential and light commercial Lennox units, it arrives as a robust assembly with a gross weight of 151