Navien’s condensing gas heating boiler is available in four sizes: NHB-55, NHB-80, NHB-110 and NHB-150, with turndown ratios respectively of 7:1, 10:1, 11:1 and 15:1. The 15:1 TDR is achieved with an advanced burner system, which features a dual Venturi gas delivery system. The series features: a 95% AFUE rating, a timed hydronic supply water boost, adjustable heat capacity, adjustable anti-cycle timer, freeze protection, adjustable delta T ranges, pressure LWCO with manual reset, adjustable minimum burner time setting and adjustable turndown ratio timing.

 Booth No. 5074