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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

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4.7
Based on 6546 reviews
Wilver was great. Knowledgeable, polite and efficient.
Repaired A/C
The person who came to fix the air conditioner was wonderful, efficient and extremely capable โ€ฆ
We could not be more impressed โ€ฆ
Stevin was very helpful and clearly explained the procedures he did for the AC unit. Also he pointed out what needed to be taken care of in the near future.
Diagnosis of a leak, good service, honest and thorough! Excellent service person, Jonathan and Jesus.
Service personnel arrived as scheduled and preformed the maintenance as included in our contract without and question, problem or difficulties.
Jonathan did a great job servicing our AC, heater and water heater all during the same visit. Very knowledgeable and professional. Would highly recommend.
Dominic was prompt, efficient, and most importantly, very friendly. He showed me exactly what was wrong and explained why. The fix was just as quick. Thanks Dominic and Princeton Air!
The Tech arrived on time, quickly figured out the problem with my AC and fixed within an hour. Pricing reasonable and professional service. Highly recommend!
Cruise was great! He addressed our AC issue quickly and professionally.
Weโ€™ve always been satisfied with McAllister and our recent experience since the merger has not changed that. We needed a new condenser for the A/C and they had a cost effective solution and were able to install it quickly.
Very efficient and on time
Princeton Air condition was extraordinary!! I received a very fair quote immediately after Inspection of my HVAC systemby their talented technician. Their technicians were prompts, professional, and polite. They installed a new system with precision and followed up Professionally. Totally proud to work with Princeton.!!
Ryan G came by and provide tips and recommendations so thorough and with full clarity that I believe will benefit in the long haul. Because of this, I was confident to re-sign up for their maintenance program. He was a true professional who is highly knowledgeable and enthusiastic with the work that he is called to do.
Jose and Corey were a great team and genuinely seemed to care about solving our issues.
I had A/C installed in May, but waited to write a review to see how effective the units can be once it's hot out. Now that I've gone through a couple high temperature days where I turned the mini splits on, I can post a review that I am completely satisfied with the installation by Princeton Air Conditioning and the ease of usage of units. I also will add that it was a pleasure to have Mike C. and Christian J. on the job; they, along with the crews that were on site over the course of the two days, were professional, communicative and upfront. I'd recommend this company to anyone looking for services.
Professional and friendly staff
Air conditioning wasn't working and they came out and got it fixed within a day. Ryan did a great job making sure everything was up and running quickly.
The job was done smoothly and efficiently and right on time
Ryan G got our old air conditioner working again quickly during a bad heat wave and, when we were ready, he explained all our options very well and laid the groundwork to make it easy for us to have installed a new air conditioner. Plus he rescued our cat three times when our cat tried to get out through the garage. He was very kind to all our pets and to us. Thank you, Ryan G!
Dominic was extremely pleasant, professional, and thorough,. He was also quite efficient. He quickly diagnosed the situation and was able to correct it. He also took the time to patiently explain my thermostat to me. Then he signed me up as a member. So heโ€™s a pretty good sales guy too!
However, I then set up an appointment for maintenance and twice Princeton Air canceled me. Iโ€™m now set up for maintenance the end of June. And thatโ€™s after they tried to set me up the end of July and I complained.And this is after Dominic signed me up as a member. Thereโ€™s something very wrong with their business model and I do not consider this good customer service. I will likely have to look for a different serviceโ€ฆ. something more responsive.
Tech (Alex) was on time, courteous, very professional. He let me know that, because of my contract w/McCallister, I would have no extra payment for the part needed.
The repair man, Dominic came out this morning to inspect our AC system. He was extremely knowledgeable, incredibly kind, and explained things very well. I work in construction and can tell you that Dominic is one of the best Iโ€™ve seen in years. Princeton air is very lucky to have him as an employee as he is SUCH AN ASSET to your company.

I also want to give a special thanks to Leah the customer service representative I spoke to. Also extremely kind and helpful. I have had the worst two weeks of my life and two strangers taking the time to kind made my heart smile. Thanks again Leah and Dominic. Chuck our Project Manager has been very kind and knowledgeable through this process as well. I am grateful for the people who work here as they made this pretty easy. Thank you all so much.
Latrell Romulus from Princeton Air did a great job of making sure my AC units were working properly. He was thorough and knowledgeable, and communicated potential areas of concern in a very clear manner.
Great job ! Very knowledgeable and informative. He made sure I was aware of any issues and explained it thoroughly! I look forward to having him again !!

(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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