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Heating, Air Conditioning & Plumbing Repair, Maintenance, and Installation in
South Jersey & Mercer County
Why Hire Us for Your Heating and AC Needs
Speedy Service
When your heating or air conditioning system malfunctions, you want things fixed as quickly as possible, right? As a result, the Professor’s fleet visits homes and families throughout South Jersey and Mercer County. Our experienced technicians arrive with fully stocked vehicles to get you back up and running quickly.
We Earn Your Trust
Yes, we are quick, but our pros are keen on details. They’ll go through everything with you to ensure you know what went wrong, why it happened and give you the best advice to repair. Customers tell us that they have never been treated more professionally and sensibly by a company. Only Professor Gatsby’s Heating and Cooling will give you that feeling of assurance and care. We are proud to stand behind our work with a 100% satisfaction guarantee!
We Are The Experts in Comfort Repair
Professor Gatsby’s expertise in both residential and commercial HVAC repair, installation, replacement and other HVAC maintenance systems, we provide reliable and efficient repair solutions to keep your business running smoothly. We expertise in both residential and commercial HVAC repair, we provide reliable and efficient repair solutions to keep your business running smoothly. Our HVAC services are straightforward. If it’s broken, we can fix it. If it’s working, we can maintain it. If it’s obsolete, we can replace it. And as for our work, we guarantee it.
5 STARS – 1 Reason
Although there may be many options, how we handle our customers sets us apart from the competition. We place a high value on the satisfaction of our clients, as seen by our 5-STAR RATINGS. For every HVAC South Jersey service we provide, we only employ the best and most experienced professionals, delighting our clients.



Proudly Serving These
South Jersey Areas and Mercer,
Proudly Serving These
South Jersey Areas,
Our Specials
Let’s warm hearts (and a home!)
this winter with Professor Gatsby’s
Warm the Heart Initiative!
With the coldest winter months fast approaching, we want to give a new heater to someone in need. Someone who could use a little encouragement. After all, home isn’t just where you live; it’s where you feel safe, comforted, loved… And warm.
Heating
All kinds of heating systems must be carefully selected and installed only by well-experienced professionals. Experts can recommend reliable brands and install the units according to industry standards. Letting professionals do the technical work will ensure the proper functioning of the entire heating system.
A/C
Everyone desires a cozy living space, especially when they are at home and want to unwind. Thanks to modern technology, it is now simpler than ever to maintain a suitable indoor temperature, regardless of the outside weather.
Plumbing


The Professor Does It All!



The Professor Does It All!



What People Say About Us
P.S. My daughter uses Professor Gatsby as well. They replaced her HVAC system and did some plumbing work for her.
We had gotten several quotes from reputable companies in the area. To be honest, the spread of prices was narrower than I expected. I will say that Professor Gatsby's was the highest initially, but we made some concessions on single vs dual stage blower etc and were able to reach a price that we were happy with. Especially since it included attic air-sealing and adding blown-in insulation.
Brandon Simpkins was very helpful in explaining all the work that would be done in detail as well as laying out our options. He also helped walk us through the process of applying for and getting all the rebates and financing for the project, and was able to get the installation of a whole-home humidifier included in the project scope as well. He was also very communicative, responding promptly to any questions/calls we had.
On install day, the crew from Professor Gatsby's showed up at 7:30AM as promised, ready to go. The install crew was at the house all day until almost 5PM and they were busy the entire time. I will say though, it is an extremely clean-looking installation. Even to the detail of the wire/pvc/gas routing you get the feeling that it was done to a high standard, and the space was clean as a whistle when they left. Jose, Jacob, and Lee were all communicative, friendly, detail-oriented, and you could tell they cared about the quality of the work. Jose, the head installer for the day, was especially communicative and kept me up to date about install progress, encouraging me to take a detailed look multiple times and ask questions so that I was fully comfortable with everything.
Now I am just waiting for the paperwork so that I can get the township to come out for the inspection for the final permit approval. To be honest, I don't expect them to find much of anything. And if they do, I am confident that Professor Gatsby will resolve it promptly and courteously.
Between the clear, detailed, and friendly communication, the flexibility on scope of work to adjust for pricing, and the quality of the install, I can only give praise so far. The equipment installed carries a strong warranty for labor and parts as well. Fingers crossed I won't have to use those warranties but they are invaluable to have for peace of mind.
knowledgeable. I would highly recommend to everyone who needs HVAC or plumbing work.
Ordinarily,the decision to replace them would have been one which required a lot of thought and consideration on our part.
But fortunately,the inspection was done by a serviceman from Professor Gatsby's.Thanks to a suggestion from a friend two years ago,we have used them for other inspections and services,and have been very pleased with their thoroughness and overall professionalism,at a reasonable cost.
The Gatsby team arrived at our house precisely at the arranged time(that in itself seems like a rarity with service people these days)
They went right to work. This was an especially challenging assignment,since our considerably sized heater was in the attic,with a very narrow entry point.So not only was it tricky to remove and bring down the old heater down the ladder,but of course the new one had to be brought up.
The crew worked diligently.
One of the things that really impressed us was that they showed a true sense of teamwork.
Well,after several hours,the work was done.Both the heater and AC unit were tested,and to say that we were pleased with the results would be an understatement!
The team also gave us a very thorough explanation of all the work that they had done,and answered all of the questions that we had for them.
If we had hired another company to have the work done,the results might have not been as satisying for us.
But the Professor Gatsby's team were superstars.Their hard work and professionalism brought us great satisfaction and we couldn't be happier with the results!
April '25 - compressor clean and a soft start installed. Excellent service from Dom D.
Problem solved!
The technician arrived on time and was extremely knowledgeable. They quickly diagnosed the issue and explained everything to me in a way that was easy to understand. The repair was done efficiently, and my heater is now working perfectly. I was impressed by their attention to detail and the care they took to ensure everything was in top condition before leaving.
Thank you for the excellent service!
PS (for Joe) - GO BIRDS! 🦅🦅🦅
David was our technician and he went above and beyond to my expectations as the leak was a lot worse than I thought and had rotted out the floor board underneath. David helped with the floor before finishing the installation and got me in contact with someone who could help more with the floor
I'm very happy with the service and would recommend them to anyone not sure who they should use for such service
Thanks so much, John!! 🙂
Highly professional service
Found the issue quickly and Resolved the problem
Highest recommendation !
3/5/2025 UPDATE: Furnace shutdown this AM. A call to Gatsby brought John M. to check things out. He gave step by step explanation as he tested various possibilities and had us up and running in short order. Excellent work by an excellent company.
EXCELLENT Based on 569 reviews Cindy Miller2024-09-11Trustindex verifies that the original source of the review is Google. They saved the day!! I had water everywhere and they were able to dispatch a technician to my house immediately! The technician was courteous, professional and really knew his stuff! Thank Professor Gatsby!! Grace Zuccarello2024-09-06Trustindex verifies that the original source of the review is Google. 2 gentlemen showed up to take a look at our water pressure and well pump. Unfortunately they were not able to preform any tests because the previous plumber had left shoddy work, and they didn’t want to risk it. They suggested a few names for us to call. Their fee ($225, I think) was not cheap to pay, but at least they were honest and didn’t cause us bigger issues. Andrew Forehand2024-09-03Trustindex verifies that the original source of the review is Google. Doug Jones2024-08-29Trustindex verifies that the original source of the review is Google. Kathryn Garrity2024-08-29Trustindex verifies that the original source of the review is Google. Greg Arena (southjerseygma)2024-08-27Trustindex verifies that the original source of the review is Google. Replaced entire HAC system with a top-notch new system last month. Doing well so far. Thank you! Matt Chimento2024-08-23Trustindex verifies that the original source of the review is Google. Steven Mays2024-08-23Trustindex verifies that the original source of the review is Google. My existing system had a failure. I called Gatsby, and they sent a technician to diagnose the issue. Unfortunately the parts were unavailable and backordered 3 months. I verified this myself by hunting down the parts and not being able to find them anywhere. After discussions with the service manager Fury, I asked to get a quote on a new system. I received quotes from other companies as well, to ensure I was getting a fair price. The salesman Steve gave me a quote that was a few thousand less then the competition, and after researching the Amana line of products I decided to go with Gatsby for a new system. Steve then went above and beyond by going back to the main office to get AC units so that my family would be comfortable until the new system could be installed. This was 5:30PM on a Friday - superb customer service. Kyle and his crew started at 7:30 and finished at 7:30. It was a long day. At the end, Kyle walked me through everything explained everything they did thoroughly. The technicians were clean and treated my home with care, and went above and beyond replacing a valve that supplied my humidifier. It is now day 2 with the new system and it is humming along. It's super quiet. After the install I texted Steve the salesman a few questions and received answers back promptly. I did a lot of research on the system and the Amana S Series with a heat pump is the real deal. It replaced my carrier infinity system and it is much quieter, performs at least as well, and was several thousand dollars less. Along with top notch customer service, clean install, 10 year parts and labor warranty - I really feel Gatsby went above and beyond in every way possible. Edward Knowles2024-08-21Trustindex verifies that the original source of the review is Google. Always send great and personable professionals to our home. Thanks again for another good experience. Thanks Joe! Ray Dudek2024-08-19Trustindex verifies that the original source of the review is Google. Sean M was extremely knowledgeable in all facets of the system. Explained precisely what he would do and what recommendations he suggested to ensure peak performance. Very friendly and clearly an experienced technician. I would highly recommend him for any heating or AC needs. I hope to see him again!
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