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An August 2026 customer praised John for thoroughly cleaning a mini-split system and protecting the property during the visit. In July 2023, another homeowner described same-day service for an AC emergency during hot weather, with technicians fixing the problem quickly. Pricing drew a strong objection from a June 2023 customer. They reported an $18,000 AC replacement quote, later reduced to $15,000, and said another technician suggested an informal $7,000–$9,000 range. That second technician agreed with Mullen that the compressor had failed. The customer praised the technicians’ manner but felt the proposed price was excessive. Mullen Mechanical says it has 20 years in business and installs air-conditioning systems, furnaces, water heaters and boilers. Google shows 4.1 stars across 13 ratings.
I called Mullen mechanical off of google, I left a message and John called me back a little while later. Nice guy very informative, you can tell he knows his business well. I had John clean my mini split system, he did a very thorough job and made sure to take care of my property. I will be using Mullen and referring them to others. Thanks, John!
John does a great install and is very personable! If you want to hire someone that is going to be honest with you and do a great job, call John at Mullen Mechanical Heating and Cooling. Unlike other contractors out there he will go the extra mile to do things right.
An absolutely excellent first experience with Mullen today. We had an AC emergency in some brutal heat and a vacation scheduled in 2 days. Spoke with John who was super responsive, kind, and understanding. We were so grateful to be able to get same day service. Techs were PHENOMENAL. So kind and helpful and fixed the problem in no time. We are so appreciative of Mullen for exceptional service!!
I live in a small raised ranch. They told me they couldn't repair my capacitor on my 3 ton AC unit and I would need to get a new one. They quoted me 18 thousand dollars to replace the unit. That's $18k for a cheap ac replacement and install. I talked to my HVAC friends and they said it's the worst quote they've ever seen. Do not even waste your time with these guys Edit: They did give me a 2nd quote that was 3k cheaper, so 15k. I had another HVAC repair guy come out the same day and he came to the same conclusion Mullen did that the compressor was shot. He hasn't given me an official quote but said it would be in the 7k to 9k range, so roughly half the price of Mullen. I hate to bash a business in my hometown but I really felt like they were trying to take advantage of us. Just getting a quote that big was stressful and defeating, because we assumed the cost would be in that range. Make sure you get multiple quotes and you're only paying for what you need/want. I will say the Mullen techs that came to the house were nice.
Service with a smile. Our furnace decided this was its last year providing us with warmth! We made a big decision and called the best person we knew! Mullen Mechanical Heating and Cooling. They were professional and got the job done fast! Like I said, Service with a smile! Because of them we will survive many Connecticut Winters to come! I shop based on a few things and professionalism and trust are #number one. Thank You John
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1 change recorded — last scanned Oct 30, 2026.
Typical Connecticut range for this kind of work, from regional averages — not a quote from Mullen Mechanical Heating and Cooling. Use it to sanity-check bids, then get the real number in writing.
Estimated range
$4,700 – $10,700
Typical HVAC project around $7,700
Water heater delivered and installed the same day5.0
Boiler replacement where Matt ruled out a chimney liner4.6
Water heater repair4.6
Sunday leak response within 30 minutes3.9
