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Typical Greater Boston range for this kind of work, from regional averages — not a quote from TJ's Heating & Air Conditioning LLC. Use it to sanity-check bids, then get the real number in writing.
Estimated range
$5,000 – $11,400
Typical HVAC project around $8,200
TJ's Heating & Air Conditioning is a Littleton-based HVAC company run by owner Tyler Janeczko, whose name shows up on nearly every glowing review — reviewers repeatedly describe him and his crew (Phil, Travis, Joe, Gill, Jim, and office manager Beverly) as straightforward, hands-on, and easy to trust with big decisions. The company's Massachusetts HVAC contractor license, held personally by Tyler Janeczko, is active. Reviewers describe specific, sizable jobs done well: a full mini-split system with three units installed before lunchtime, a sunroom air handler and outdoor condenser installed in a single day at a reasonable price, and a whole-house AC replacement priced $4,000 under a competing quote for equivalent equipment. One customer said TJ's beat every other quote on a central-AC install by over $500; another said a technician showed them that half the work a different company had quoted wasn't actually needed, and a third mentioned a technician who declined a tip. Several long-time customers describe using the company for a decade or more across furnace, AC, and mini-split work. Not every account is this smooth. Two separate reviews describe being charged $225 for a diagnostic visit that lasted about 15 minutes and that the customer felt was rushed or wrong — one says the crew blamed a roof leak that wasn't the actual problem, another says the tech turned the unit off and on without real troubleshooting. A 2025 review described suction-line insulation installed with the wrong material, which the homeowner had to redo themselves, and another described a scheduled maintenance visit that ran three and a half hours late with no notice. A couple of reviews also complain about unwanted marketing follow-up after declining a quote. For an install or an ongoing service relationship, the specifics here run deep and mostly positive. If calling about a stand-alone diagnostic visit, it's worth asking upfront what the flat fee covers.
“We have had good experiences working with TJ’s http://www.tjsheatingandair.com”
Very professional, courteous and knowledgeable!
Tyler, the owner of TJ’s HVAC was great to deal with and they installed a full new system in our sunroom, including an air handler and outside condenser in one day at a very reasonable price. We definitely recommend them! Thanks, Bert.
We cannot say enough great things about our experience! From start to finish, the team was professional, knowledgeable, and an absolute pleasure to have in our home. They thoroughly cleaned our HVAC system and, most importantly, identified and resolved our indoor air quality issue — something we had been struggling with for far too long. Tyler is outstanding. His expertise and attention to detail gave us complete confidence that the job was being done right. It’s rare to find someone who truly takes the time to explain what’s going on and genuinely cares about the outcome. Our home feels so much better now — the difference in air quality is noticeable and we couldn’t be more relieved and grateful. If you’re dealing with humidity issues, poor air quality, or just need your HVAC system serviced, look no further. We highly recommend this company and are so thankful we found them. They’ve earned a customer for life!
TJ's HVAC helped replace our HVAC system after it was damaged. The initial estimate they sent us was $4000 less than a competing estimate from another HVAC company, even though the equipment was equivalent. They were very transparent and responsive throughout the process. They were able to schedule the replacement really promptly even though we were entering their busy summer season. Excellent work from start to finish.
TJ’s brought two people to our house to check on why our AC vents were dripping water. They spent all of 15 minutes looking around and said it was our roof leaking. It was clearly not our roof leaking, but they would not listen. Then they charged $225 for this 15 minute incorrect assessment where they hardly looked at anything. I have never had a contractor charge such a high price for coming out for such a short amount of time (and to offer incorrect information). I tried to express my concern and offered to pay for the 15 minutes they were here instead of the full one hour rate, but they said they charge $225 for all assessments. I guess this was on me for not asking how much it would be. However, I still find this to be a very high price especially for such a rushed assessment and poor experience. After their visit, I called Nashoba Air & Boilerworks. A person came out and diligently checked each of our AC vents, took time to check our thermostat, thoroughly reviewed each of the ducts in the attic and found the issue and told us out to resolve it. It was an easy, low-cost fix we did that day and it was NOT our roof leaking. Nashoba was much more knowledgeable and was able to solve our problem! They were also extremely thorough and charged a much more reasonable price. I can’t imagine how bad it would be if I had trusted the misinformation I was given, gotten a new roof and still didn’t have the problem resolved! I write this to save you time and money- don’t use TJ’s unless you want a short, expensive visit where they don’t solve your problem and tell you wrong information!
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Certified attributes are verified against the public registry. Others are the business's own statement.
1 change recorded — last scanned Aug 16, 2026.
Full HVAC system installed in one day4.6
Only firm that answered calls after a holiday power outage4.5
4.0
Factory-authorized dealer3.8