(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

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4.7
Based on 6435 reviews
Technician arrived promptly and diagnosed the problem with our air-conditioning as being the blower that was not operating properly. Karume advised us of the ordering process, quoted us a price for the part as well as who to contact at Princeton Air Parts Dept on Monday for more information on how long it would take for the part to come in and be installed. Karume is an exemplary employee and is always welcome to make a service call at our house.
Great job.on time great experience
Great experience. Workers explained everything and completed the work.
All communication with the office was excellent. The electrician Brian who did the work explained the issue, the process of the repair and the new work beyond my expectations.
Jonathan was very thorough and professional. Thank you!
Installed new furnace and thermostat
Very professional and addressed all my concerns
Dominic M. And Christian were great honest, thorough, and very professional. We just moved into our new home and are thrilled to have started a maintenance membership with this company. The experience was smooth and reassuring from start to finish. Highly recommend!
Jason was very polite and professional and helpful, kind and willing to listen and share his experienced skills.
Erim is a talented plumber! He fixed my shower faucet with new parts which was very complicated. He was the only one who could do it. Thank you Erim!
Mike G is, without question, the best plumber I have ever had the pleasure of working with. His meticulous attention to detail and exceptional craftsmanship set him apart from anyone else in his field. Beyond his technical expertise, Mike brings a level of professionalism and knowledge that immediately inspires confidence. I highly recommend both Mike G and Princeton Airโ€ฆ you will not be disappointed.
Princeton Air replaced AC in my HVAC unit during heat wave last week, and they did an excellent job. I would like to mention that staff who did the install, Jeff, Don and Brian. They worked fast and did so in a very professional manner. They wore shoe covers and laid down canvas cover to protect the carpet on their way to the HVAC unit in the basement. I was very happy with the service they provided.
I had a great experience with Princeton Air. I had an issue with a part of my healer leaking. Within an hour of calling about this problem, Dylan, the technician, arrived at my house. He soon identified the problem. The next day 3 technicians came back and replaced the faulty part.
Technician was professional and helpful. He was prompt.
Neim is an excellent technician. He is very knowledgeable, thorough and pleasant. We are very pleased. Thank you!
Always prompt response and excellent service. We've had two different technicians and both were excellent!
Prompt excellent service. Ryan takes the time to explain what and why needs to be done to maintain optimum HVAC performance. Iโ€™m really happy when Princeton Air sends Ryan to our home!
Norman is very good at his job! He comes in listens and FIXES on the first visit! I couldnโ€™t be happier with the service he provided! Shout out to Norman
Great customer service. Dominic was very knowledgeable!
Brian H. was the name of the employee who came to assess the problem. He was very professional, took our problem seriously (electrical issue), and worked hard to diagnose the cause. I would thoroughly recommend Brian H and Princeton Air. I quickly booked online, received confirmation texts, email and calls. Very satisfied customer.
Dominic was a pleasure to deal with. I would recommend his services without hesitation.
We recently had a new AC system installed after our 16 year old system cried "uncle!" We have been a customer of Weltman, now Princeton Air, since we moved into our home and over the years we have had mixed feelings about the service and price we paid. Our recent experience, however, was all positive. From the initial technician call to see what our issue was by Cruise, to the the evential sales visit with Andre, to the final installation by Asterson and his team, everyone was professional and dilligent about all aslects of the job. Each took the time to explain our situation, provide us with options, and more importanly, not pressure us into anything we did not want to do. The electrucuan, Joe, discovered an unsafe electrical connection, disabled it, explained the issue and why it was problematic, and provided us with a quote to bring it into compliance and make our home safe. All in all, though we were not anticipating the need to have our AC system replaced, I am glad it is done and very happy with how it all turned out. I am happy to recommend PA and will be making a call to have our electrical issue resolved!
Jose was very professional. I definitely recommend and give 5 stars to this company
Dominic McGinley is a TOTAL professional! He is so knowledgable and takes the time to answer all of our questions. He is also a delight to work with. Thank you, Dominic, you have our total confidence and we appreciate the care you put into what you do.
Dominick McGinley is a TOTAL professional! He is so knowledgable and takes the time to answer all of our questions. He is also a delight to work with. Thank you, Dominick, you have our total confidence.
Thrilled to have a proper quick connect hose for the gas line going to our outdoor grill. Appreciate the friendly, fast and efficient service!

(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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