or electric furnaces and 2-wire hydronic systems

While the nitrile seals are compatible with standard pneumatic oils

Key Benefits Comprehensive Averaging: The 8-foot element eliminates false readings caused by air stratification in large ducts

this spring is specifically calibrated for the 325-3 frame size

leak-free fit with existing gas manifolds

Lennox 44W57 Collector Box 321702-401 or electric furnaces and 2-wireThe Lennox 44W57 Collector Box (OEM #102109 04) is a critical condensating furnace replacement part engineered for high efficiency gas furnaces, including popular Lennox G61MPV and EL195 series models. Often referred to by technicians as a cold end header box, this component is responsible for gathering and channeling corrosive condensate and combustion byproducts away from the heat exchanger and into the drain trap. Its internal pressure switch ports