10-plate Brazed Plate Heat Exchanger, 316L Stainless Steel, Copper Brazed, 1" MNPT, up to 150,000 BTU/hr for use with Outdoor Wood Boilers, Domestic Hot Water Heating Unit Dimensions: 4-1/4"x12" - 10 plates, 1" MNPT ports. BTU Output: up to 150,000 BTU/hr 316L Stainless Steel Brazed Plate Heat Exchanger - Copper Brazed - Flow Rate: up to 30 GPM (max) Outdoor wood furnace and wood boiler heating Water-to-Water heating and cooling applications Domestic hot water heating applications