Engineered for the AAON RN and HB series

it maintains a 0-50 PSI operating pressure differential

Is this unit compatible with A2L refrigerants

and Payne residential gas furnaces

or use a multimeter to measure MFD

Lennox 64J12 Collector Box Assembly Freon Engineered for the AAON RNThe Lennox 64J12 Collector Box Assembly (Model LB 66579C) is the critical OEM replacement cold end collector box for legacy high efficiency furnaces. Designed as a direct swap for Lennox G26, 90UGF, and G32 series units, this genuine HVAC replacement part is identical to the 64J1201 catalog number. It functions by sealing the secondary heat exchanger's exit point to manage the transition of corrosive combustion condensate and exhaust gases toward the