Raypak manufacturers a large size range of commercial water heaters from 42,000btu all the way up to 4,000,000btu. We also make a product designed to fit any application, from our tried and true 82% atmospheric models, the 84% fan assisted all the way up to our 98% high efficiency heaters. We even offer a fire tube model now! We also offer state of the art BMS integration with our VERSA IC control. This is standard on our Xtherm, XFyre, MVB and XPakFT products. Visit or web site and explore the possibilities that Raypak offers.