Navien introduces the NHB (Navien Heating Boiler) series in four sizes for residential and light commercial use: NHB-55, NHB-80, NHB-110 and NHB-150 with turndown ratios respectively of 7:1, 10:1, 11:1 and 15:1. The noteworthy 15:1 TDR in the NHB-150 is achieved with Navien’s dual Venturi gas delivery system. The company will begin selling the new line of boilers in the U.S. and Canada in the fourth quarter. Navien.
Navien boiler series
November 24, 2014