HVAC
Average Cost: $6,000 - $10,000
Navien boilers are known for industry-leading efficiency, compact designs, and advanced controls. In this review, we cover Navien boiler models, pricing, efficiency ratings, customer feedback, and how Navien compares to other top boiler brands.
Our Verdict: Navien is an excellent option for homeowners who want a high-efficiency, condensing boiler with modern features and strong performance. However, the advanced technology may not be ideal for every home or installer.
This Navien boiler review focuses on one of the most recognized names in high-efficiency residential heating. Navien is a global manufacturer specializing in condensing boiler and water heating technology, with a strong presence in the U.S. market.
Navien boilers are designed for hydronic heating systems and are widely available nationwide. The brand is especially popular for homeowners upgrading to high-efficiency gas systems and those looking for space-saving, wall-mounted designs.
| Best For | Top Model | Cost Installed | Standout Feature | Warranty |
|---|---|---|---|---|
| High-efficiency condensing boilers with smart controls | Navien NCB-H | $6,000 to $10,000 | Up to 95% AFUE efficiency | Up to 15 years on heat exchanger |
At Modernize, we like brands that push efficiency forward, and Navien does that exceptionally well. Navien boilers are designed to reduce energy usage while maintaining consistent indoor comfort, which can translate to lower monthly heating bills.
Navien also stands out for its smart technology, including intuitive controls and system monitoring. For homeowners upgrading from older boilers, Navien offers a noticeable leap in performance and efficiency.
Navien boilers offer cutting-edge features, but they may not be the right fit for every project.
Pros
Cons
Navien focuses exclusively on high-efficiency gas boilers designed for modern hydronic heating systems. Their offerings include:
Navien boilers are compatible with radiant floor heating, baseboard systems, and indirect water heaters.
Navien’s boiler lineup is streamlined, making it easier for homeowners to compare options based on capacity and functionality.

Navien boilers generally receive positive feedback for efficiency, compact size, and modern features. Many homeowners report noticeable reductions in fuel usage after switching from older systems. Negative reviews often mention the importance of professional installation and maintenance.
“ … I’ve used Navian in my last two house and love them. Highest efficiency on the market.” — Reddit Reviewer
“I just replaced a combi unit under warranty @ 8 years… clogged secondary heat exchanger but Navien honored the warranty and swapped the whole unit. The new unit seems very well designed.” — Don, Facebook Review
“I had a brand new Navien combi boiler installed with brand new copper piping and it cost 16k. It was not cheap, but it came with ten year warranty and it looks great now. I hated having to do it, but my old one wasn’t maintained well and the piping was crap.” — Reddit Review
Navien boilers typically cost $6,000 to $10,000 installed, placing them in the mid-to-premium price range. While the upfront cost can be higher than standard-efficiency boilers, Navien’s high AFUE ratings often lead to lower energy bills over time.
Installation costs vary depending on whether the system is replacing an older boiler or converting from a different heating setup. Combi boiler installations may reduce costs by eliminating the need for a separate water heater.
| Navien Model | Installed Cost Range |
|---|---|
| NCB-H Series | $7,000 to $10,000 |
| NHB Series | $6,000 to $9,000 |
| NFC-H Series | $6,500 to $9,500 |
| Home Size | Estimated Installed Cost |
|---|---|
| Under 1,500 square feet | $6,000 to $7,500 |
| 1,500 to 2,500 square feet | $7,000 to $9,000 |
| Over 2,500 square feet | $8,500 to $10,000 |
When choosing a boiler, comparing brands side by side can help clarify which system best fits your home, budget, and efficiency goals. Below, we break down how Navien compares to other well-known boiler manufacturers, highlighting key differences in cost, performance, and overall value.
Explore Our Weil-McLain Review
Navien boilers often come up in conversations about high-efficiency heating upgrades, and homeowners tend to have similar questions about performance, longevity, and maintenance. These frequently asked questions address some of the most common concerns to help you decide whether a Navien boiler is right for your home.

Yes. Navien boilers are designed exclusively as condensing systems and achieve efficiency ratings of up to 95% AFUE. This high efficiency can significantly reduce energy usage compared to older or standard-efficiency boilers.
Some Navien models are combi boilers, meaning they provide both space heating and domestic hot water. This can eliminate the need for a separate water heater and save space in the home.
With proper installation and routine maintenance, Navien boilers typically last 15 to 20 years. Longevity depends heavily on installation quality and system sizing.
Navien boilers require trained technicians familiar with condensing systems. While maintenance is not overly complex, improper installation or setup can lead to performance issues over time.
Navien boilers are a strong choice for homeowners who prioritize energy efficiency, modern controls, and space-saving design. While they may not offer the same longevity as cast-iron systems, their performance and efficiency make them an appealing option for many homes.
Want to compare more boiler brands? Visit the Modernize Review Hub to explore top manufacturers, compare costs, and connect with trusted local heating professionals.
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