Carrier Gas-Fired Condensing Water Boiler - Series A Breadcrumb Home / Products / Residential / Hydronics / Boilers / Carrier Boilers / BW9 - 90 AFUE Boilers Loading... Mfg Part #: BW9AAN000050 Brand: Carrier AFUE - Upflow: 90 Capacity (BTUH): 50,000 Ship Weight (Lb.): 256 System Type: Gas-Fired Condensing Water Boiler Volts-Phase: 115-1