The Navien NHB-H condensing boiler delivers high-efficiency hydronic heating with up to 95% AFUE efficiency and an industry-leading turndown ratio up to 15:1. Designed for residential and light commercial applications, the NHB-H features dual stainless steel heat exchangers, built-in zone control capability, advanced user controls, and flexible venting options. Its compact wall-hung design, cascade capability up to sixteen boilers, and optional Wi-Fi connectivity provide reliable, energy-efficient performance for modern boiler and radiant heating installations.

• Dual stainless steel heat exchangers
• SCH40, 2" venting up to 65'
• 3" venting up to 150'
• Up to 15:1 turndown ratio
• Built-in zoning control
• Innovative hybrid-ready heating for a seamless, high-efficiency system