Get current pricing for Oem, 8.21 MM BTU/HR One (1) Thermal Fluid Systems Hot Oil Boiler, Type Kv 2.5/25, 8.21 Mm Btu/hour, 800 Gpm, Rated 150 Psi @ 600 Degrees F, 1123 Sq. Ft. With (2) 50 . Product Category: Process Equipment, Sub Category: Process Boilers: