Since 2006, Navien, Inc. has become one of the fastest growing companies in the home comfort sector in North America and is now a leader in condensing technology, providing condensing tankless water heaters, combi-boilers, and boilers.* Navien's products possess state-of-the-art technology, high efficiency and reliable quality.
Navien has achieved international recognition for its sophisticated engineering and robust designs. Backed by parent company, KD Navien with more than thirty-five years of experience with advanced boiler and water heating technology, Navien will continue its mission to provide high quality products.
Ultra Condensing Efficiency
Navien's condensing technology provides high efficiency heating
Saves more money and energy than traditional water heaters and other boilers.
Two Stainless Steel Heat Exchangers
Reduces minerals deposits.
High resistance to corrosion and erosion means longer life expectancy.
Low NOx Emissions (less than or equal to 20ppm)
Newly designed metal fiber burner delivers a consistent gas/air mixture, improving combustion efficiency.
Less production of greenhouse gases and acid rain.
Complies with strict SCAQMD 1146.2 NOx emissions standards.
2" CPVC, PVC, Polyprophylene Venting Up To 60 feet
2" venting option allows a flue to be pulled through existing vents.
3" vents can be used for up to 150 feet with 2" x 3" adapters.
NHB heaters allow for easy convertibility from natural gas to liquid propane.
Powerful Anti-Freeze System
The built-in Control System was designed to keep the unit frost free in winter conditions.
Hydronic Heating Benefits
Economical, clean, silent, and comfortable
Utilizes Existing 1/2" Gas Line
Negative Pressure Gas Valve with dual venturi operation allows better adaptability in low gas pressure applications.
NHB boilers can be installed on 1/2" gas lines for up to 24'
Installation & Operation Manual
User's Information Manual
Quick Installation Manual
Wall Mounting Bracket
Four Tapping Screws & Anchors
LP or NG Conversion Kit
Two 2" Vent Termination Caps
Four 2" Wall Flanges
Pressure Relief Valve for Heating
Outdoor Temperature Sensor and Cable
Air Vent Bushing (3/4" to 1/2")
Spare Parts (fuse, etc.)
Ready link cascading system: Built-in controls for easily configuring the settings for a multi-unit, cascading system.
No extra control boards are required, so your installation cost are lower.
Easily wire together units and set one boiler as parent and one as child.
Up to 16 units can be linked in one group. Unlimited groups can be cascaded. Cascading creates redundancy to ensure hot water availability.
NHB-series boilers can be installed on a wall, and have a compact, small form factor. This allows for a multi-unit installation in a smaller area.
Popular applications: Hotels, restaurants, schools, hospitals, health centers, beauty shops, and more.
Product Line: NHB
Medium : Hot Water
Fuel Type : Natural Gas
Combustion Type: Condensing
Vent Type : Direct Vent
Modulating/Staging : Modulating
Mount Type: Wall
Minimum Altitude: 0 Feet
Maximum Altitude: 10100 Feet
Includes Pump: No
Assembly Type: Packaged
Gas Conversion Kit: Included
Maximum Input Capacity : 150000 BTU
Minimum Input Capacity: 10000 BTU
DOE Heating Capacity : 138000 BTU
Net I=B=R Capacity : 120000 BTU
AFUE : 95 %
Low NOx Emissions : Yes
Voltage: 120 Volts
Frequency: 60 Hz
Flue Connection Size: 2 Inches
Gas Connection Size: 0.75 Inches
Supply Connection: 1 Inch
Return Connection: 1 Inch
Product Height: 24 Inches
Product Width: 17 Inches
Product Depth: 13 Inches
Product Weight: 80 Pounds
Energy Star Listed: Yes
CSA Listed: Yes
ASME Certified: Yes
AHRI Certified: Yes
AHRI Reference Number: 7501498
Parts Warranty : 5 Years
Heat Exchanger Warranty: 15 Years