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The Navien NHB‑55H water boiler is a compact, ultra‑efficient wall‑hung condensing boiler engineered for reliable hydronic heating in smaller homes, apartments, and energy‑conscious installations. With 55,000 BTU of heating output, 95% AFUE, and a smooth 7:1 turndown ratio, this water boiler model delivers exceptional comfort, quiet operation, and long‑term fuel savings. It operates on natural gas or propane, offering maximum flexibility for residential upgrades and replacements.
Key Features
High‑Efficiency Condensing Performance
95% AFUE for outstanding energy savings
Stainless‑steel heat exchanger for durability and corrosion resistance
Low NOx emissions for cleaner, environmentally responsible operation
55,000 BTU Heating Output
Ideal for smaller homes, apartments, and well‑insulated spaces
Provides consistent, dependable hydronic heating even in colder climates
7:1 Turndown Ratio
Wide modulation range ensures precise temperature control
Reduces cycling, improves efficiency, and extends component life
Fuel Flexibility
Operates on natural gas or propane
Perfect for both urban and rural installations
Compact Wall‑Mounted Design
Saves valuable floor space
Quiet operation suitable for utility rooms, closets, and tight mechanical areas
Smart Navien Controls
Intuitive digital interface with advanced diagnostics
Outdoor reset compatibility for improved comfort and efficiency
Installer‑friendly setup and serviceability
Dimensions
Height: 24.0 in
Width: 17.3 in
Depth: 13.2 in
Ideal For
Small homes, condos, and apartments
High‑efficiency natural gas or propane installations
Hydronic heating systems with modest heat loads
We service and install all types of HVAC heating and cooling equipment throughout Long Island, including (but not limited to) this coverage area:
Nassau County: Oyster Bay, Hempstead, North Hempstead, Glen Cove, Long Beach, Freeport, Valley Stream, Garden City, Great Neck, Mineola, Hicksville, Levittown, Massapequa, Bethpage, Plainview, Syosset, Jericho, Westbury, Rockville Centre, Farmingdale
Suffolk County: Huntington, Babylon, Islip, Smithtown, Brookhaven, Riverhead, Shelter Island, Southold, Southampton, East Hampton, Commack, Deer Park, Lindenhurst, Bay Shore, Brentwood, Central Islip, Hauppauge, Centereach, Selden, Medford, Patchogue, Shirley
Contact us today at (631) 779-3196
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