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Tankless Water Heater Installation for Endless Hot Water

A tankless water heater heats water only when you need it, which changes how the basement looks and how the water bill reads.

A traditional tank stores 40 to 75 gallons of hot water and reheats it all day, losing energy in the process.

Princeton Air handles tankless water heater installation with licensed plumbers, proper gas-line resizing, venting done to code, and rebate coordination through the New Jersey Clean Energy Program. After the install, hot water is continuous for as long as you need it, the basement reclaims the space the tank used to occupy, and water heating costs drop meaningfully every month.

Schedule your consultation online or call our experts for tankless water heater services today.

Need Tankless Water Heater Installation? Princeton Air Is in Your Neighborhood

Converting a tank to a tankless system is a real project, not a swap.

The gas line often needs resizing, the venting needs rerouting, and the water supply typically needs modification to match the way tankless units flow. Homeowners across Edison, New Brunswick, Lawrence Township, and Hillsborough Township have worked with us to make the conversion cleanly. Each installation is shaped by the existing utilities and the home’s hot water patterns.

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What to Expect From Your Tankless Water Heater Installation

A tankless conversion is involved, and you deserve to know what the project looks like before work begins.

Tankless conversions touch the gas line, the venting, the water supply, and the electrical. Princeton Air has complete home services with licensed plumbers and electricians to install your new system respecting your time and home. We move through four steps to coordinate all of it cleanly.

Your licensed plumber reviews the existing water heater, the gas line size and routing, the venting path, the electrical supply, and the household hot water usage. Tankless systems have specific requirements, and the recommendation is shaped by what your home actually supports.

Your basement or utility space is protected throughout the work. The old tank comes out, the gas line is resized if needed, new venting is routed to code, and the tankless unit is mounted and connected. Permits and inspections are handled as part of the project.

The gas supply, venting, and water connections are all checked before the system fires. Flow rates are verified at multiple fixtures simultaneously to confirm the unit meets household demand. You get a walkthrough of the controls, the descaling procedure, and normal operation patterns.

Your relationship with Princeton Air doesn’t end at the install. You have a local team with more than 50 years of experience servicing homes across the region, and we’re the ones you call when anything comes up. Annual descaling keeps a tankless unit running at rated capacity for its full life.

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What Our Customers Are Saying

100% Satisfaction Guarantee

4.7
Based on 6447 reviews
Our Tech Dominic was Awesome!! Thank you so much!!
On time. Completed work on all units … Heater, air conditioner, and hot water heater … Within the time frame.
After a few mishaps, Princeton Air came through and got my AC system running when the temperatures are soaring.

Thanks to Will and my technician, Alberto, for getting everything fixed.
Responsive, knowledgeable, dependable, & honest. Thank you for getting out heat up & running!

Update:10/12/18
Chris S got the heat last year and remembered when he arrived today, asked if it had a problem since. He came back to do a PM on the heater and while he was waiting for me to arrive, he opened up the air conditioner to inspect it and saw the coils were filthy. Took out his hose and cleaned them. Then when done, did the heater PM and then โ€œsaid I just want to verify that ringing noise went away. Your house will cool much faster now!โ€ I really like what Princeton air offers, quality and care, diagnose and fix. Not rushing to get to the next job. Theyโ€™re so good I got the year round service plan.

Update may 2025&2026
Maurice is fantastic.
Prompt and knowledgeable. Great technician.
There was an urgent need for a mold problem to be handled in a bathroom. They quickly identified the problem, tested the seriousness, and took care of it – in a very timely fashion. They communicated with me all along the way so I could fully comprehend what was going on. All the people were very knowledgeable, pleasant and accommodating. My experience with them was excellent, and I would highly recommend them.
Eric M. was prompt, professional, courteous and quite helpful. I become a better consumer when I understand the problem & possible solutions. Eric was willing to answer my questions and made me feel secure that he would follow up to help fix our problem.

New review: 2/6/2018
Notice a problem with the humidity in my home, called and got a service appointment in the same day. Will D came out and sure enough, confirmed there was a problem, explained what exactly was happening, why it was happening and how to check that it was working correctly. His demeanor was pleasant, he was professional and seemed to be quite knowledge!
Great service. Domenic was so helpful and explained everything done.
Jermaine Richmond was very knowledgeable and explained my plumbing issue throughly. Thank you.
Pretty micron air was quick to fix my sewer
Friendly and efficient. Quick response service
Eric did a fantastic job
Installation of water heater hvac and furnace – very professional and process oriented –
The technician who came was Jonathan Redondo. He was very knowledgeable and did an excellent job! I would highly recommend him .
Christian and Mike were professional, thorough, patient, and kind throughout my heating boiler installation.
Always excellent service with McAllister.
Robert came to check my 2 carbon monoxide detectors, which were very old. I decided to have him go ahead and replace them with smoke detector/ carbon monoxide combination units. He was very polite and efficient .
Jihmy and Asterson did an outstanding job and were extremely professional during a recent installation of a mini split and air handler. They communicated well, kept the house clean and did the job with a level of professionalism and expertise that was refreshing.
Good job
Maurice Gaines who cleaned and serviced my air conditioner was fantastic! He was fast, respectful and very fast with the repairs.

He made me feel like I was getting the full respect and honesty I so needed for something so important and really appreciated the time he took to explain every and answer all my millions of questions. Also Princeton Air communications were fast and accurate , leaving no question unanswered as to timing and confirmation of appointment. Iโ€™m so happy with their staff and with Maurice- heโ€™s a gem!
Thank you!
The young man who came out to fulfill our annual service contract was extremely professional and was very thorough. Although he told us we needed a new ac unit I felt confident that he knew what he was talking about and took the right amount of time in order to make his recommendation. I want him back every year. Unfortunately I forgot his name because Iโ€™m old.

He then had Ricky call us with replacement ac unit recommendations. He was just as professional. He then took the time to visit our condo, take measurements himself and then made recommendations on what size unit to purchase. I really feel he saved us money. He was amazing.

We then were contacted by a gentleman named Steve who was a manager in the service and installation department. Itโ€™s hard to believe but he was just as good as the first two representatives and was an absolute pleasure to work with. He was a true professional and a real asset to your organization. I will always use your company if I can work with this team. Keep up the great work. Thanks for allowing me to spend $8,000.its hard to believe I didnโ€™t even get other quotes because I was so happy with your team.
Water purification system
Recently Princeton Air did a routine maintenance check on our HVAC UNIT. The technician was Dominic McGinley. I must say Mr. McGinley was outstanding. After performing the maintenance and evaluation, he sat down with us and explained his findings in precise detail. He has also taken pictures of everything he found. Dominic was a pleasure with whom to interact. He was professional, friendly, and extremely knowledgeable. He explained everything in terms that we could definitely understand. He is one of the finest technicians that has ever performed preventative maintenance on our equipment. In my estimation he has all of attributes of a first rate Service Technician. Hopefully Princeton Air just what a valuable asset he is for the company. I certainly hope to interact with him many times in the future.
We recently used Princeton Air to install a new heater. They gave us lots of options, explained each one thoroughly, they arrived promptly on installation day and did a great job. The price was the lowest of three companies I contacted for estimates. Five stars!
Always professional and informative.

(609) 799-3434

Benefits of a Tankless Water Heater

A well-installed tankless system changes how a home uses hot water.

Here’s what homeowners gain when they make the conversion.

A properly sized tankless system delivers hot water for as long as you need it. Back-to-back showers, a full dishwasher cycle, and laundry running simultaneously no longer drain the tank because there is no tank to drain. For larger households, this single change reshapes mornings and evenings. Nobody has to plan their shower around someone else’s.

Tank water heaters reheat the same stored water continuously, even when no one is using it. Tankless systems heat water only on demand, which typically cuts water heating energy use by 20 to 35 percent for most households. The savings compound monthly across the 15 to 20 year life of a tankless system.

Traditional tank water heaters last 8 to 12 years. Tankless units routinely last 15 to 20 years or more with proper annual descaling. Across the life of a home, that’s one installation instead of two. The initial cost is higher, but the per-year cost is often lower when the longer life is factored in.

A tankless unit mounts on the wall and takes up roughly the footprint of a suitcase. Compared to a 50 or 75 gallon tank, that’s significant reclaimed space for storage, a laundry area, or finished square footage. Basement remodeling projects often begin with the water heater conversion for exactly this reason.

High-efficiency condensing tankless water heaters qualify for rebates through the New Jersey Clean Energy Program and federal tax credits through the Inflation Reduction Act. We track current incentives and structure the installation to capture them. The net installed cost after incentives is often much closer to a conventional replacement than homeowners expect.

Why New Jersey Homeowners Choose Princeton Air for Tankless Water Heater Installation

Tankless installations reward experience.

The gas line sizing, the venting layout, and the electrical tie-in are all places where a less-experienced installer introduces problems that show up years later. For more than 50 years, homeowners across the region have chosen Princeton Air for the installations that hold.

Every tankless installation is completed by a licensed plumber with experience sizing gas lines, routing venting, and coordinating the electrical. Tankless work is not the same as a tank swap, and the team doing it reflects that.

Tankless units need more BTU per minute than tank systems do. An undersized gas line starves the unit and shows up as poor hot water performance months after the install. We size the gas properly from day one.

High-efficiency condensing units cost more and save more. Non-condensing units cost less and vent more simply. We walk through the comparison with real numbers for your specific home rather than defaulting to one answer.

Tankless installations require permits in most New Jersey municipalities, and inspections are part of the process. We pull the permits, schedule the inspections, and confirm the job passes before we close out the project.

Natural gas service across the region runs through PSE&G, Elizabethtown Gas, and New Jersey Natural Gas. Each has slightly different coordination requirements for tankless installations, and we work with all of them regularly.

The available incentives change year to year. We track what’s current, lay out what applies to your installation, and structure the paperwork so you capture everything available.

If the system develops an issue after our install, we come back. That commitment runs through the first day and every year the unit serves your home.


Join the Princeton Air Home Comfort Club

Taking care of your home is easier when someone is taking care of it with you.

The Princeton Air Home Comfort Club is a whole-home membership built around four pre-scheduled maintenance visits each year, so the systems you rely on stay in peak condition through every season.

Members receive a discount on service work, credits toward future installations, priority scheduling during the busiest times of year, no dispatch fees when work is performed, and our 24-hour emergency service guarantee. It’s the simple way to protect your home, your budget, and your routine year after year.

Princeton Air Technician


(609) 799-3434

Complete Home Services For Your Home

A tankless installation often connects to other utility and plumbing work worth handling in the same visit.

A tankless water heater is one part of the home’s plumbing system. The water running through it and the fixtures pulling from it all shape how well it performs.

When your existing water heater needs diagnostic work or a repair, our team handles it with the same care we bring to installation. Catching a small issue early keeps it small.

Annual service is how a water heater hits its rated efficiency and lifespan. Routine attention turns a system that might have lasted 10 years into one that lasts 15.

New Jersey hard water shortens the life of every water-using fixture in the house. A whole-home water softener protects everything from the water heater to the kitchen faucet.

Princeton Air handles every corner of residential plumbing, from the incoming water line to the drains and every fixture in between. One licensed team for the whole house.



Schedule Your Tankless Water Heater Consultation

A tankless water heater changes how a home uses hot water and how the utility bill reads.

If your tank is aging or you’re ready to recover the basement space it takes up, our licensed plumbers will walk through the project honestly and install a system built to serve the home for decades. Call Princeton Air to schedule your consultation.

Princeton Air Technician


Tankless Water Heater Installation FAQs

How long does a tankless water heater installation take?

Most tankless installations take one to two days of on-site work. If gas line resizing or extensive venting rework is needed, the timeline extends. Permits and inspections can push the overall project a few days longer depending on municipal turnaround.

Is a tankless water heater right for every home?

Not always. Homes with limited gas service, unusual venting constraints, or very low hot water demand sometimes work better with a conventional tank. We give you the honest assessment rather than defaulting to the more expensive option.

Will one tankless unit handle my whole house?

Usually yes, with proper sizing. Larger homes or homes with very high simultaneous demand sometimes need two units in parallel or a recirculation configuration. We size the system during the consultation.

How often does a tankless water heater need service?

Annual descaling is the standard across most of New Jersey, where minerals in the water build scale in the heat exchanger over time. Homes with water softeners can sometimes extend that interval. Skipping descaling shortens tankless life significantly.

Are there rebates for tankless installations in New Jersey?

Yes. The New Jersey Clean Energy Program, utility rebates, and federal tax credits through the Inflation Reduction Act all apply to qualifying high-efficiency tankless units. The specific amounts change year to year, and we track current incentives during the consultation.

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