Navien is the number one selling condensing boiler and combi boiler brand in North America, and we are factory-trained to install and service the full lineup. If you are looking for high efficiency, compact design, and the latest technology, Navien is one of the strongest options available for Nassau and Suffolk County homes.
Navien has become one of the most popular boiler brands in the Northeast, and Long Island is no exception. The company specializes in high-efficiency condensing boilers and combi boilers, and every model in their lineup achieves a 95% AFUE rating. That is a significant improvement over the 80% to 85% efficiency of older cast iron boilers, which translates to real savings on your gas bill every month.
For Long Island homeowners specifically, Navien offers several practical advantages. The wall-hung design takes up roughly 80% less space than a traditional floor-standing boiler and water heater combination. That freed-up space matters in the basements and utility closets common across Nassau County and Suffolk County homes. The combi boiler models eliminate the need for a separate hot water tank entirely, providing both space heating and on-demand domestic hot water from a single compact unit.
Navien also supports flexible PVC venting up to 150 feet, which gives our installation team more options for routing exhaust in homes where traditional chimney venting is not ideal. Combined with Wi-Fi connectivity through NaviLink and built-in multi-zone control for up to three zones, Navien delivers a level of technology and convenience that few other brands can match at this price point. See our full brand lineup for other options we carry.
No entry-level or mid-efficiency options. Every Navien boiler is a high-efficiency condensing unit that qualifies for rebates and tax credits.
The number one combi boiler manufacturer in North America. Heat and hot water from one wall-hung unit with up to 5.4 GPM flow rate.
Up to 80% smaller than a traditional floor-standing boiler and water heater combination. Ideal for the tight mechanical spaces in many Long Island homes.
Up to 15:1 turndown ratio means the boiler modulates output precisely, reducing short cycling and wasted energy. Quiet, consistent comfort.
Monitor and control your boiler from your phone. Adjust temperatures, view diagnostics, and receive alerts from anywhere.
Dual stainless steel heat exchangers resist corrosion and are backed by a 10-year warranty. Built with robotic laser welding for durability.
The average Navien boiler installation on Long Island falls between $8,000 and $10,000 for a typical residential replacement. The final number depends on whether you choose a heat-only model or a combi unit, the complexity of your venting and piping, and any additional work required.
In many cases, Navien installations come in slightly lower than comparable cast iron replacements because the wall-hung design reduces labor time and PVC venting is less expensive than stainless steel. If you are replacing an older floor-standing boiler, there may be additional work to transition piping from the old location to a wall-mount configuration.
All Navien condensing models qualify for National Grid rebates and federal tax credits of up to $600, which can reduce your effective cost. We also offer flexible financing through Wisetack with payments as low as $100 per month. For a detailed breakdown by system type, visit our cost guide.
It is hard to overstate how quickly Navien has become a go-to brand for contractors across Long Island and the greater New York area. Their combination of high efficiency, compact size, competitive pricing, and strong technical support has made them the default recommendation for many hot water baseboard and radiant floor heating upgrades.
We have installed hundreds of Navien boilers across Nassau and Suffolk County. The NHB series is our most-requested heat-only model for homes with existing baseboard systems, and the NCB-H combi series is the leading choice for homeowners looking to eliminate a separate water heater and reclaim valuable space. Both series are well suited for Long Island homes, where natural gas is the dominant fuel and hydronic heating systems are the standard.
One practical benefit that contractors and homeowners appreciate is the ease of installation. Navien units are light enough for a single technician to wall-mount, and PVC venting keeps material costs down compared to stainless steel vent systems. That efficiency in installation often translates to lower labor costs compared to heavier, floor-mounted alternatives from brands like Weil-McLain or Burnham.
From the first phone call to your first warm morning, here is what to expect when you replace your boiler with a Navien.
We evaluate your current system, calculate your heating load, and recommend the right Navien model. We explain all rebates and financing options. No cost, no obligation.
Once you approve the estimate, we schedule at a time that works for you. We stock popular Navien models for fast turnaround. Emergency service is also available.
Our crew removes your old boiler, wall-mounts the new Navien, runs PVC venting, and tests the system. Most installations are completed in one day. We clean up and haul away old equipment.
We register your warranty, submit rebate paperwork, set up NaviLink Wi-Fi, walk you through the controls, and provide tax credit documentation. We are here for any questions after the job.
The complete Navien residential boiler lineup we install on Long Island. Every model is 95% AFUE, wall-hung, condensing, and ENERGY STAR certified.
| Model | Type | AFUE | Sizes (MBH) | Turndown | Application |
|---|---|---|---|---|---|
| NHB-H Series | Condensing | 95% | 55, 80, 110, 150 | 15:1 | Wall-hung condensing boiler. Stainless steel heat exchanger. NHB Integrated control. Built-in 3-zone control. Cascade up to 16 units. Ideal for baseboard and radiant systems. |
| NFB-H Series | Fire Tube | 95% | 175, 199 | 15:1 | Patented stainless steel fire tube heat exchanger with ASME H stamp. Larger capacity for bigger homes and light commercial. Backlit control panel with click wheel. NaviClean compatible. |
| Model | Type | AFUE | Heat / DHW (MBH) | DHW Flow | Application |
|---|---|---|---|---|---|
| NCB-H Series | Combi | 95% | 60/120, 80/150, 100/180, 120/199 | Up to 5.4 GPM | Space heating and domestic hot water from one unit. Dual stainless steel heat exchangers. 15:1 DHW turndown. Built-in 3-zone control. HotButton recirculation ready. Cascade with up to 15 NPE tankless units. |
| NFC-H Series | Fire Tube Combi | 95% | 175/210, 199/210 | Up to 5.4 GPM | Highest capacity combi boiler on the market. Patented fire tube heat exchanger. Designed for larger homes needing both high heating output and high hot water demand. Runs 3 showers and a dishwasher simultaneously. |
Long Island homeowners share their experience with Navien boiler installations by our team.
"They recommended a Navien combi boiler for our ranch in Plainview. It freed up a ton of space in our utility closet and our gas bills dropped noticeably. They walked us through why it was the right fit instead of just picking whatever was cheapest."
"Replaced our 25-year-old Burnham with a Navien NHB-110. The installation was done in about six hours and the difference in heating performance is night and day. The Wi-Fi feature is great for checking temperatures when we travel. Very happy with the recommendation."
"We converted from oil to gas and went with the Navien NCB combi. No more oil tank in the basement, no more separate water heater, and our energy costs dropped significantly. Domino's handled the whole conversion, permits and all. Could not be happier with the result."
We install and service Navien boilers across every town in Nassau County and Suffolk County. Based in Melville for fast response.
Every town from the Queens border to the Suffolk line. Garden City, Levittown, Massapequa, Hempstead, and 60+ more communities.
Nassau County DetailsOur home base. Huntington to Montauk, including the North Fork, South Fork, and everything in between.
Suffolk County DetailsCommon questions Long Island homeowners ask about Navien boiler replacement and installation.
Get a free in-home estimate. We will evaluate your current system, recommend the right Navien model for your home, and provide a complete quote with all available rebates factored in.