Navien Tankless Water Heater Installation and Repair on Long Island
Endless hot water. Lower energy bills. Professional installation and 24/7 repair service across Nassau and Suffolk County.
Navien Hot Water Heater Price
Fully installed pricing includes the unit, gas line connection, venting, permits, old unit removal and disposal, and full system testing.
NPE-A2
Premium efficiency with instant hot water and built-in recirculation for the ultimate comfort.
NPE-S2
Top performance at a lower price point with excellent energy efficiency and reliability.
NHW-AI
Budget-friendly indoor option perfect for tight spaces with solid performance and low maintenance.
NHW-AE
Best value outdoor model with no complex venting requirements and easy installation.
Why Long Island Homeowners Choose All Island Comfort
| Feature | All Island Comfort | Other Contractors |
|---|---|---|
| Master Plumber | ✓ | ✗ |
| 24/7 Emergency Service | ✓ | ✗ |
| Free On-Site Estimates | ✓ | ✗ |
| Upfront, Transparent Pricing | ✓ | ✗ |
| Licensed and Insured | ✓ | ✓ |
| 0% APR Financing Available | ✓ | ✗ |
| All Navien Models In Stock | ✓ | ✗ |
| Condensate Neutralizer Included | ✓ | ✗ |
| Same-Day Repair Available | ✓ | ✗ |
Long Island's Trusted Navien Tankless Water Heater Specialists
All Island Comfort has been serving Long Island homeowners and businesses since 2010, specializing exclusively in Navien tankless water heater installation, repair, and maintenance. Located in Wading River, we serve Nassau and Suffolk County with professional, certified technicians available 24/7 to handle everything from new installations to emergency repairs.
Whether you're looking to replace an aging tank water heater or repair your existing Navien system, we provide transparent pricing, upfront estimates, and expert workmanship. Our team stays current with the latest Navien technology and installation techniques, ensuring your system runs at peak efficiency for years to come.
Ready to learn more? Visit our about page to meet our team, or contact us today for a free on-site estimate.
Why Navien Is the Best Tankless Water Heater
Navien is the #1 selling condensing tankless water heater brand in North America, and for good reason.
Dual Stainless Steel Heat Exchangers
Navien was the first to offer dual stainless steel heat exchangers and burner. This means longer life, better durability, and industry-leading warranties up to 15 years on the heat exchanger.
Up to 0.96 UEF Efficiency
Condensing technology recovers extra heat that non-condensing units lose. The result is lower energy bills, reduced CO2 emissions, and less expensive PVC venting instead of stainless steel.
ComfortFlow Built-In Recirculation
The NPE-A2 includes a built-in buffer tank and recirculation pump that heats water in supply lines. No more waiting for hot water at the faucet, and no need for an external pump or return line.
Up to 80% Smaller Than Tank Heaters
A standard 50-gallon tank takes up to 16 square feet of floor space. Navien's compact wall-hung design frees up valuable space in your utility room, closet, or garage.
Endless Hot Water on Demand
Unlike tank heaters that run out during heavy demand, Navien units heat water directly as it flows through the system. Take back-to-back showers, run the dishwasher and laundry at the same time.
NaviLink Wi-Fi Smart Control
Monitor and control your water heater from your phone with the NaviLink app. Set recirculation schedules, adjust temperature, get maintenance alerts, and track energy usage remotely.
Compare All Navien Tankless Water Heaters
| Specification | NPE-A2 | NPE-S2 | NHW-AI | NHW-AE |
|---|---|---|---|---|
| Type | Condensing | Condensing | Non-Condensing | Non-Condensing |
| Energy Factor | 0.97 | 0.96 | 0.82 | 0.82 |
| Max BTU | 199,900 | 199,900 | 199,900 | 199,900 |
| Max Flow Rate | 11.2 GPM | 11.2 GPM | 9.5 GPM | 9.5 GPM |
| Built-in Recirculation | Yes | No | No | No |
| Wi-Fi Compatible | Yes | Yes | No | No |
| Venting | PVC | PVC | Stainless Steel | Not Required |
| Condensate Neutralizer Required | Yes | Yes | No | No |
| Dimensions (H x W x D) | 17.3 x 27.4 x 13.2 in | 17.3 x 27.4 x 13.2 in | 17.3 x 25.2 x 10.3 in | 17.3 x 25.2 x 10.3 in |
| Warranty | 15-yr HX, 5-yr parts | 15-yr HX, 5-yr parts | 15-yr HX, 5-yr parts | 15-yr HX, 5-yr parts |
| Installed From | $7,900 | $7,800 | $4,540 | $4,040 |
Our Navien Services
Tankless Water Heater Installation
New construction, tank-to-tankless conversions, and unit replacements. Free on-site estimates with transparent pricing. All Navien models in stock.
See installation services ➤Repair and Maintenance (24/7)
Emergency repair service around the clock. Error code diagnosis, heat exchanger descaling, parts replacement, and annual maintenance for all Navien models.
See repair services ➤Condensate Neutralizer Service
Required for all condensing models. Installation, media replacement, pH testing, and drain line maintenance for NPE-A2 and NPE-S2 units.
See neutralizer services ➤
Control Your Water Heater from Your Phone
Navien's condensing models (NPE-A2 and NPE-S2) connect to your home Wi-Fi through the NaviLink app. Adjust water temperature, set recirculation schedules, receive maintenance reminders, and monitor system diagnostics from anywhere.
Affordable Financing for Every Budget
We understand that upgrading your water heater is an investment. That's why we partner with Wisetack to offer flexible financing options that work for your budget. Borrow from $500 to $25,000 over 3 months to 10 years, with plans starting at 0% APR.
0% APR Options
Qualify for interest-free payments on select terms.
No Hard Credit Pull
Check rates instantly without impacting your credit score.
Approval in Minutes
Fast application process with decisions in minutes, not days.
Serving All of Long Island
All Island Comfort serves residential and commercial customers throughout Nassau and Suffolk County. We're available 24/7 for emergency repairs and scheduled installations in every neighborhood on Long Island.
Frequently Asked Questions
How much does a Navien tankless water heater cost on Long Island?
Navien tankless water heater installation starts at $4,040 for the NHW-AE outdoor model and goes up to $7,900 for the premium NPE-A2 with built-in recirculation. The price includes the unit, gas line connection, venting, and full system testing. Financing is available starting at 0% APR.
What is the best Navien model for my Long Island home?
Do you offer 24/7 emergency tankless water heater repair?
Yes. All Island Comfort provides 24/7 emergency repair service for all Navien tankless water heater models across Nassau and Suffolk County. Call (631) 591-2289 any time, day or night.
What is the difference between condensing and non-condensing?
Condensing models (NPE-A2, NPE-S2) achieve up to 0.97 energy factor and use affordable PVC venting but require a condensate neutralizer. Non-condensing models (NHW-AI, NHW-AE) cost less upfront, use stainless steel venting, and do not need a neutralizer.
Do you offer financing for Navien water heater installation?
Yes. We offer flexible financing through Wisetack with plans from 3 months to 10 years, starting at 0% APR. No hard credit pull to check your options. Apply in minutes.
Ready to Go Tankless?
Stop dealing with cold showers and high energy bills. Get a free estimate from All Island Comfort today. We serve all of Long Island, available 24/7 for installation and emergency repair.
Look for current promotions and discounts or explore financing options that fit your budget.