Stainless Vertical Firetube (SVF) boiler portfolio has expanded to include four larger BTU sizes of 1500, 2000, 2500 and 3000 MBH. The boilers feature 96.8 percent thermal efficiency. The line features a stainless-steel vertical fire tube and shell heat exchanger for corrosion resistance, user-friendly controls to make installation and operation easy, and a long-term corrosion resistance solution in the form of a serviceable and replaceable condensate tray.