(609) 799-3434

Tankless Water Heater Replacement from a Team That Specializes In It

When a tankless system fails, it is not just an inconvenience, it is a system the home depends on that suddenly stops delivering.

Princeton Air’s licensed plumbers install tankless water heaters across Mercer County every week, which means the gas sizing, venting, and flow rate considerations that can trip up a general plumber are already handled correctly.

Your tankless water heater replacement in New Jersey comes with a clear assessment, written pricing, and a clean install completed in a single visit. You stop thinking about the system entirely, and the household runs the way it should when hot water is consistent and reliable. Call Princeton Air or schedule online today.


24/7 Emergency Tankless Water Heater Replacement Service

A tankless unit that will not fire cuts the household off from hot water the same way a leaking tank does.

Tankless emergencies look different from tank failures because there is no floor of water to clean up, just a system that has silently stopped producing.

A Princeton Air plumber on the phone can help you verify gas supply, reset the ignition sequence where appropriate, and determine whether the issue is repairable on the spot or needs full replacement. A licensed plumber is on the way regardless of the outcome of that conversation.

(609) 799-3434

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How Your Tankless Water Heater Replacement Actually Goes

Tankless work is a plumbing, gas, and venting project all at once, which is why the team doing it makes the difference.

Four steps from first call to continuous hot water restored.

A phone call or online booking puts you on the schedule with a real arrival window. The team member handling intake confirms the visit, and the plumber calls on the way.

A licensed plumber walks the space, reviews the existing unit, the gas line, the venting path, and household hot water demand. You see one or two options matched to the home and the household, with written pricing before any work is committed.

The crew brings the new unit and every gas, venting, and plumbing component the project requires. The old unit is removed, the new one is mounted cleanly on the wall, and every connection is pressure-tested before the plumber calls the job done.

Before the crew leaves, the new tankless unit is fired, run through multiple draws, and verified at the temperature you prefer. The controls are walked through with you, the warranty is explained, and the first maintenance interval is put on your calendar.

(609) 799-3434


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 Replacing Your Tankless Water Heater

Tankless technology has advanced meaningfully over the last decade.

A new unit runs more efficiently, manages simultaneous draws better, and integrates with smart monitoring in ways older equipment did not.

Today’s tankless water heaters use more advanced heat exchangers, improved ignition systems, and better flow sensing than the units they replace. The equipment handles back-to-back draws without the temperature swings older tankless models had.

New tankless units often include app-based monitoring, flow tracking, and alerts when maintenance is due. You know the unit’s status without opening the utility closet, and it tells you before a small issue becomes an emergency.

Modern tankless units heat water only when it is called for, which eliminates the standby losses every tank water heater has. Over the course of a year, the difference adds up to meaningful savings and a noticeably quieter utility space.

New tankless units are engineered for higher efficiency than earlier generations. Monthly gas bills drop meaningfully after replacement, and high-efficiency units often qualify for federal tax credits and utility rebates.

Every Princeton Air tankless water heater replacement carries manufacturer warranty coverage on the equipment and our 100% satisfaction guarantee on the work. The coverage is explained at the end of the install, and follow-up is one phone call away.


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

Tankless equipment is specialized, and the team doing the replacement should treat it that way.

Princeton Air has built the tankless practice that serious New Jersey homeowners look for.

Every tankless replacement is led by a licensed Princeton Air plumber with specific tankless experience. The team knows the gas sizing, the venting codes, and the flow rate considerations that make the difference between a working install and a frustrating one.

When a tankless unit fails, the household is without hot water entirely. Our dispatch moves a plumber to the home quickly, and most replacement projects have the new unit running within a day or two of the first call.

Tankless equipment sits in the basement or utility space, but the project path often runs through finished rooms. Protective coverings go down along the work path, the space is left the way it was found, and every room the plumber passes through stays clean.

Princeton Air has been serving homeowners across Hamilton Township, Princeton, West Windsor, Lawrence Township, and the surrounding Mercer County communities for more than 50 years. Our tankless practice has grown as the equipment has matured, and the local plumbing code knowledge shows up on every install.

Every option includes written pricing in advance, and applicable federal tax credits and New Jersey Clean Energy Program rebates are captured as part of the project scope.

Every Princeton Air tankless water heater replacement is backed by our 100% satisfaction guarantee. If something is not right, we come back.

Plumbing, electrical, heating, cooling, and indoor air quality all run through one Princeton Air team. Tankless projects occasionally touch the gas line or the electrical panel, and the same company coordinates both trades on one schedule.

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 is 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

Tankless is one piece of the plumbing, and Princeton Air covers the rest of the house too.

A full-service home comfort company under one roof.

Beyond tankless water heaters, the Princeton Air licensed plumbers take care of tank water heaters, water softeners, fixtures, drains, sewer work, and full plumbing projects across the home.

Licensed Princeton Air electricians handle panels, outlets, surge protection, lighting, and standby generators. Some tankless projects involve electrical tie-ins, and the same company takes care of both trades.

Furnaces, boilers, heat pumps, ductless mini splits, and central air conditioning are all supported by the same Princeton Air team installing your tankless unit. One company for the full temperature and hot water story of the house.

UV purification, whole-home filtration, humidifiers, and dehumidifiers integrate with the rest of the home’s systems to keep the air in the house as well-managed as the water.


Schedule Your Tankless Water Heater Replacement Today

A tankless system that is no longer delivering reliable hot water is the wrong equipment to keep working around.

A Princeton Air licensed plumber can be at your home quickly, review real options without pressure, and have a new tankless unit running the day of the visit. Call Princeton Air or schedule online today.

Princeton Air Technician


Tankless Water Heater Replacement FAQs

What is the typical lifespan of a tankless water heater in New Jersey?

A well-maintained tankless water heater typically lasts 15 to 20 years, longer than a standard tank unit. Annual descaling is especially important in New Jersey’s mineral-heavy water, and the units that receive regular maintenance often reach the upper end of that range.

Does it make sense to replace tankless with tankless, or switch back to a tank?

For most households that chose tankless originally, replacing with a new tankless unit continues to make sense. A Princeton Air plumber can walk through household hot water demand during the assessment and recommend the configuration that fits the home going forward, including tankless, a tank, or a hybrid system.

How long does a tankless water heater replacement take?

Most tankless replacements complete in a single day, including removal of the old unit, mounting of the new one, gas and venting tie-in, and testing. Projects that require new venting or gas line work may extend into a second day.

Are rebates available for tankless water heater replacement?

Yes. High-efficiency tankless water heaters often qualify for federal tax credits through the Inflation Reduction Act and New Jersey Clean Energy Program rebates. Princeton Air captures the available incentives as part of the project scope.

Are permits required for tankless water heater replacement?

Yes. Most New Jersey municipalities require permits for tankless water heater replacement, and Princeton Air pulls the necessary permits as part of the project. Permitting protects you at future home inspections and at resale.

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