NHB-150H – Condensing Heating Boiler – 150,000 BTU

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