This unit is a 20 Plate Stainless Steel Heat Exchanger. One common application for these plate exchangers is for use in conjunction with outdoor wood stoves when transferring heat to the existing indoor pressurized boiler system essentially keeping the two fluids separate with optimal heat transfer. We give realistic heat transfer outputs using realistic flow rates. Any brazed plate Heat Exchanger can have higher or lower performance data based on temperatures, flow rates, and other variables. BTU Rating 97,000 BTU/hr @ 10 GPM Product Data Material: 316L Stainless Steel plates with 99.9% copper brazing Type: Liquid to Liquid Connections: 1" MPT Ports Design Pressure: 435 psi Test Pressure: 652 psi Design Temperature: -256F - 437F Approvals: UL Listed Advantages Wide port spacing to allow for easier installation (2-3/4" C-C) Four Mounting Studs on front cover for ease of installation 1" MPT connections available on all units, 1-1/4" MPT connections available on units 40 plates & larger Rated for use in high temperature (437F) and pressure applications (435 psi) The Heat Exchanger carries a Limited Lifetime Warranty How It Works An extremely high heat transfer coefficient is attained due to the flow characteristics in each channel. A specially designed and tested chevron pattern causes a turbulent flow of the fluid resulting in higher heat transfer and reduction of the amount of deposits inside the unit.