Navien will be introducing a new Fire Tube Boiler line at AHR Booth #5758, Chicago in January. The NFB, Navien Fire Tube Boiler, is designed for residential and light commercial applications. Four models will be displayed at AHR: 175,000, 199,000, 299,000 and 399,000 Btu/h, each offering a new patented heat exchanger design, ease of installation Read more