HVAC reviews in Stamford, Connecticut

This ENCON visit was a semi-annual maintenance check. Wendy did a great job of making sure the scheduling of my appointment was well coordinated. Matt was the technician, and he was terrific; professional and extremely helpful. I had a list of questions regarding my geothermal system, and he took the time to provide explanations to me. He also identified issues with a radiant heat system that I did not know existed, and he was able to resolve the problems. He also helped me set up my thermostats to my Wi-Fi; he was very patient with me which I greatly appreciated. I would highly recommend ENCON/Matt as an HVAC service provider.

The technician from Encon, Jean, was terrific! In preparation for the Winter months, he came to our house to conduct the semiannual check-up our HVAC system and perform system maintenance, as a component of our annual maintenance contract. He arrived promptly, was professional and quietly went about his business. Jean is a gentleman and a skilled technician. I highly recommend him!

As always Encon (Bret) was timely, expedient and courtesy. Bret has been servicing my HVAC systems for quite a few years and he is always a pleasure to deal with. He is always ready to explain what he did and to answer and address any concerns that I may have. Ty, Gene V.

We had an urgent boiler issue right before Halloween and ENCON was incredible. From the quick response time to the expertise of the technicians (Dylan and Jason - with Michayla for set-up), the entire experience was seamless. They diagnosed the issue quickly, fixed it efficiently, and ensured everything was running smoothly. Their service gave us comfort and peace of mind right when we needed it most. Highly recommend ENCON for dependable, high-quality service!

I recently had a very disappointing experience with Encon. Since I had a service contract with them, I foolishly relied on their surfaces. After ongoing issues with my heating system (Encon service calls starting 11/2024) their technicians could not find the issue. This problem became progressively worse until my heating system would only stay on for 2–3 hours at a time. In December 2025-Feb 2026. Encon sent out numerous technicians whom were unable to properly diagnose the problem. I was told by one technician that it was something as minor as a “loose wire,” which turned out to be completely inaccurate.
I ended up hiring an independent HVAC professional, who quickly identified that the system did not need a new expansion tank (as suggested) and instead replaced an air vent and the low water cutoff. Since then, the system has been working perfectly. The total cost was $1,800 LESS than what Encon had quoted and fixed within 1day.
It’s frustrating that this issue wasn’t correctly diagnosed months earlier. If the assigned technicians weren’t certain how to resolve the problem, a more experienced professional should have been sent. Not to mention that a part that they wanted to install, one that Did not need replacing was delayed by almost a month. In the coldest time of the year (due in March).
While Danielle, my service manager was very helpful and responsive — and I truly appreciate her assistance — the overall service experience has left me disappointed. I will not be renewing my service contract.

Discovered a heating issue in a zone of our house and called in for a service call first thing on Monday. While I noted my service was not an emergency since I did have heat in other areas of our house, Encon still made a point of sending a service technician by that afternoon. Ernie Sanchez arrived when expected and immediately set about resolving our issue - which he did. All was up and running as normal within a couple of hours with a clear explanation from Ernie and notice that he would need to come back again to fully fix our issue. We have not yet been billed for this service but in light of the bitterly cold temperatures, I am confident that Ernie’s time was efficient and effectively spent.

You have to treat service at an empty building differently. A window such as 8 - 10 does not work when the owner/manager must travel to be present to allow your technicians to gain access. This visit I arrived at 8:00. Your team arrived at 8:45, but for some reason, parked their van 200 feet away. I was waiting for a communication about their arrival which never came. It was when I was leaving that I discovered them down the street. Better communication is necessary. Once that was settled, your team performed their tasks efficiently.

Best AC in town

I have always received nothing but the best of service from Carmine and his staff. I would never hesitate to refer him to anyone!
M. Gossett

Save yourself time and money by choosing C V Longo Heating & Air Conditioning Grandview! Hands down, they offer the best service, quality, and value for your money. I spoke with Upul, who walked me step-by-step through the entire process, patiently answering all my questions and addressing every concern. The entire team was incredibly professional, and their work was second to none. They even left the job site everyday cleaner than when they started. Check out the before and after pictures—they truly speak for themselves! C V Longo Heating & Air Conditioning Grandview successfully got rid of our old boiler, hot water tank, and oil tank. The quality of materials and craftsmanship was outstanding!

They are a really great company, used them for new HVAC AC installation, new motor installation, and now fan in the can. Danny and Joe are great and very knowledgeable, really appreciate all your help. The girls in the office are great, always helpful and great about getting back to me and setting up appointments.

Great service!

Highly Recommended!

Great-excellent organization

Very good, knowledgeable and professional team.

LOVE working with these guys, they are the best in the area!

Craig did a good job with the repairs on the furnace. He also explained issues with the furnace.

The technician was quick and efficient. Great job getting my AC up and running for the season

Excellent work and competitive pricing. They are my go-to provider for all my HVAC needs.

One of the few companies that always comes on time, is polite and efficient, and does the job right. Hard to find these days!

So skilled at assessing our situation and working on installing our Nest thermostat. Great group.