
HVAC, HVAC
"Had to replace an old boiler in my home - Sam was the first to respond, offered a price that was below other proposals and did the work in one day - versus three from other potential vendors. Extremely professional, personable, hard-working and thorough. Would not leave until everything was working perfectly and to his satisfaction. Above and beyond service, especially for boiler systems that others won't handle. Moving all my business to Sam and I-HVAC - would highly recommend to anyone."
Nick T. in December 2021

Water Heater Replacement, Heating Services, Air Conditioning Services , and 7 more
"Great service and price. Hire them for any of your HVAC needs."
Holly B. in December 2019
"Provided great service when it was an emergency at my mothers house and got here AC back up and running right away and was also able to service my unit same day. He showed me exactly what was wrong and was very honest and fair with the pricing and repairs. Saved my mother a lot of money!!! He definitely has a customer for life with me. His knowledge and professionalism is excellent!!!! I would recommend him to anyone!"
Mesay B. in March 2024

Water Heater Installation, Humdifier and dehumidifier installation, HVAC System Installation , and 1 more
"Very professional and respectful of the Covid situation. My problem solved in less than one hour."
Marion B. in December 2020
In business since 1931
HVAC, Electric, Plumbing
About us: "United Air Temp, Air Conditioning and Heating, LLC is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests, and make their concerns the basis of our business."
Gas furnace / Force Air Heating system - repair, Gas Furnace / Force Air Heating System - install, Heat Pump - Repair or Service , and 7 more
"I have called my Home Warranty because my heating system will not turn on, United Air Temp arrived and start replacing parts and took them around 2 weeks to tell me you need a new system I called the Home Warranty again and I asked them for a 2nd opinion, Yazd Mechanical came and told me the same thing, you need a new system. Now it's been a month without heat and luckily it wasn't that cold, I had to buy some portable heaters to get by. My colleague told me to call Diep from T&J Services, and I did, Diep told me that someone miss/ wrongly wired the system, he reconnected everything the way it supposed to be, changed a copastor/booster in the outside unit, and everything is working fine, Thanks Diep for an honest and affordable job. We truly need more of you."
Naser K. in December 2020

Cabinets, trim, carpentry, baseboard, flooring, Decks building, fences, doors, windows,etc., Home Improvements, General contruction , and 7 more
"Excellent experience. Needed steps on a deck repaired and some other fixes. Thanks!"
9CD96FAB8D9E3972B442730CF690B8F13CF3CD0D727A2B54DD1D4A0F04307C41 0. in November 2025
Mount Vernon HVAC & Air Conditioning Contractors are rated 4.8 out of 5 based on 520 reviews of 520 pros.
The HomeAdvisor Community Rating is an overall rating based on verified reviews and feedback from our community of homeowners that have been connected with service professionals. See individual business pages for full, detailed reviews.
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