Navien NHB-150H – Condensing Heating Boiler – 150,000 BTU
The Navien NHB-150H is a high-efficiency condensing wall-hung boiler designed for indoor residential and light commercial heating. It delivers up to 95% AFUE with a 15:1 turndown ratio, providing precise temperature control and energy savings. Compact and wall-mounted, it measures 17.3″ wide by 23.8″ high and 12.8″ deep, weighing 80 pounds. The boiler supports forced draft direct venting with flexible vent pipe options and lengths, allowing versatile installation.
This model includes advanced user controls and a built-in 3-zone controller to simplify multi-zone heating systems. Safety is prioritized with multiple built-in detectors and sensors, while certification to Energy Star and other standards ensures reliability. The NHB-150H is field convertible for use with natural gas or propane, meeting diverse installation needs.
Features
95% AFUE efficiency with 15:1 turndown ratio
Field convertible between natural gas and propane
Electronic ignition system
Stainless steel primary and secondary heat exchangers
Built-in 3-zone controller for zone valves or pumps
Vent compatible with 2″ or 3″ PVC, CPVC, polypropylene, and special gas vent piping
Maximum vent length: 2″ up to 65 feet, 3″ up to 150 feet
Compact wall-hung design: 17.3″ W x 23.8″ H x 12.8″ D; 80 lbs
Advanced controls with backlit interface, click-wheel, and setup wizard
Safety devices including flame rod, air proving switch, gas valve and ignition detectors, high limit switches, and vent installation detector
Zero clearance to combustibles
Certifications: Energy Star, CSA B149.1, ASME H, ANSI Z223.1
Applications
Residential and light commercial space heating
Multi-zone hydronic heating systems
Installations requiring compact, wall-mounted boilers
Retrofits and new construction
Systems needing flexible venting and fuel options
 
ZCS