Teledyne Laars BR098907 Cupronickel Heat Exchanger, 18 Tube Assembly, with glass-lined tubs, 5000I (indoor), 4500E (outdoor), Previous Part #20098907
Used on the following models:
AP4500, AP5000, HH4500, HH5000, PH4500, PH5000, PW4500, PW5000, VW4500, VW5000,
MT4500, MT5000.