Verified record
Millas Heating & Cooling describes itself as a family-owned company, in business since 2016, that installs and services residential heating and cooling equipment. Its Connecticut heating licence, HTG.0405813-S9, held by MILLAS HEATING & COOLING LLC, is active on the state registry. Google shows 4.9 stars from 49 ratings, and its BBB page is an A+. A 2026 customer said Jay gave a quote and explained options, the installers put down tarps, and Jay completed the Groton Utilities paperwork. In 2025, a customer said Millas installed a complete heat pump mini-split system and a new Roth oil tank. A 2024 customer said the company installed a ducted heat pump system in a house with no existing ductwork. A 2026 customer had a combo gas boiler and water heater installed. In 2025, a customer said Jay and his guys installed a Pure Pro Trio boiler, a Heat Flo indirect water heater and a new oil tank, then walked through the operation. A 2025 customer named Julia said Jay planned a propane boiler system, removed the oil tank and old boiler, and obtained the permits. In 2023, a customer said Jay called on the first cold day of fall to report a flaw he had found in their system and came that day to fix it. A 2022 customer said their calls were never returned.
A super great company to work with! From the time Jay spent giving me a quote and explaining all my options to the installation this was nothing but a professional company to work with. I was never left in the dark as that my questions were always answered in a timely manner. The installers were quick at what they had to do and were attentive to keeping my home clean. They were always wiping their feet even though they had put down tarps for everywhere they needed to walk and worked and made sure my outside yard was put back to the way it was before they started the job. I could not find one piece of trash anywhere after they left. The process was also made easier as that I did not have to find my own electrician due to that being taken care of in the original quote thus making one less thing for me to do and coordinate between two different companies on installation day. Jay took care of everything including completing the paperwork for Groton Utilities so that all I had to do was sign the form and write my utility account number on the form and mail it in. You cannot go wrong by calling Jay to come out and give you a quote as that he and his team are top-notch!
Jay and his crew were awesome throughout the entire process of installing my new combo gas boiler and water heater. Their work was quick, clean and efficient. The communication throughout the process was excellent. My family is extremely happy with the outcome of this project. If you want quality work then I highly recommend working with this company.
Jay and his crew were very professional for a fair price on my mini-split installation. Installation of both the indoor and outdoor units looks great, they cleaned up well after themselves, and were very responsive throughout. Highly recommend.
We can't say enough good things about this company. In this environment when many companies don't return calls Jay and his team where great from the first phone call until his team finished the job. They installed a complete new heat pump Mini Split system for AC / Heat and a new Roth oil tank, all completed onetime. Highly recommend using them for your AC or Heat needs.
From beginning to end Millas was responsive, efficient, and friendly!! They called the first Monday after I emailed them asking for a quote. They showed up on-time, gave some great advice, and gave me a quote that was under what I expected. The team they sent to install the mini split system were very friendly, knowledgeable, and answered all my questions. I am so very glad I chose them to make this upgrade to my house!
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Certified attributes are verified against the public registry. Others are the business's own statement.
1 change recorded — last scanned Oct 30, 2026.
Typical Connecticut range for this kind of work, from regional averages — not a quote from Millas Heating & Cooling LLC. 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