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Top-Rated Central a/c installers in Lexington - Updated Nov 2026

Avatar for Sila Heating, Cooling, Plumbing and Electrical
Sila Heating, Cooling, Plumbing and Electrical
4.5(
5,404
)
Central A/C - Install

Serving Lexington, MA and surrounding areas

Approved

In business since 1989

Free estimates

Emergency services offered

Live Your Most Comfortable Life with a Company You Trust. \nWe offer Same Day Service and Next Day Installation! \n \nSila has been the center of delighting homeowners since 1989, with our team of engineers, certified technicians, and system designers that are proud to deliver the highest level of expertise in the HVAC industry. Whether it?s a repair, replacement, installation, or service, we have an unwavering commitment to keeping you and your family comfortable and safe ? season after season. \nWe guarantee satisfaction and are proud to have earned over 7,000 ?A? ratings on Angie?s List and its prestigious Super Service Award!

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+6

66 neighbors recently requested a quote
Recommended by89%of homeowners
Avatar for Druziako HVAC Inc
Druziako HVAC Inc
4.7(
157
)
Central A/C - Install

Serving Lexington, MA and surrounding areas

Approved

In business since 1990

Free estimates

Emergency services offered

"I got central air installed in my 100+ year old house that I was convinced could never actually have central air. Despite the weird shape of the house and not a lot of extra space to work with, Druziako figured out a way to get it installed. They was fantastic from the initial estimate appointment through finishing installation. Everyone is extremely friendly and you can tell it is a family owned business. The price was extremely reasonable and everything got done quickly. It took a couple of extra days beyond the original plan but that was only to make sure it all got done correctly and to figure out how to work out a few problems (again with the old house). Great communication including after the fact to help us get rebates and warranties set up. 100% recommend."
Aprilaire Dehumidifier
Attic Air Handler
Duct Cleaning before and After
Attic Ductwork
Aprilaire Humidifier

+3

Response time11 hrs
16 neighbors recently requested a quote
Recommended by95%of homeowners
Avatar for Genove Oil & Air Co
Genove Oil & Air Co
4.7(
217
)
Central A/C - Install

Serving Lexington, MA and surrounding areas

Approved

In business since 1977

Free estimates

Emergency services offered

"Excellent. I've had Genove install both gas and oil heating systems in my properties, most recently oil. They have also installed central air/hydro air and handle my oil delivery. The techs have always been polite & knowledgable. Their customer service is impeccable. As a landlord/home owner, I couldn't be happier with them handling all my HVAC needs and would recommend them to anyone."
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Pics
Pics

+2

Response time12 hrs
Response rate100%
12 neighbors recently requested a quote
Avatar for Total Comfort Mechanical Inc
Total Comfort Mechanical Inc
4.9(
225
)
Central A/C - Install

Serving Lexington, MA and surrounding areas

Approved

Super Service Award Winner

In business since 2009

Free estimates

Emergency services offered

"We sought proposals to install a central heat pump system to provide heating and cooling, and to make our oil-fired furnace only serve as back-up heat. TCM’s proposal was by far the best — responsive to what we needed, economical, and thorough in addressing some of our quirky conditions. The installation happened quickly and smoothly. It was well coordinated even though there were 5 different people with roles on the job. The team was cordial, careful, and addressed our concerns all the way through the job. And the office team was great too with communication and paperwork. They know their way around the financing and rebates too. Highly recommend!"
Service Truck
Cambridge Heat Pump Installation
Billerica Mitsubishi Ductless Installation
Response time10 hrs
Response rate100%
9 neighbors recently requested a quote
Avatar for Landry Mechanical, Inc.- HVAC
Landry Mechanical, Inc.- HVAC
4.5(
108
)
Central A/C - Install

Serving Lexington, MA and surrounding areas

Approved

Super Service Award Winner

In business since 2008

Emergency services offered

Warranties offered

"Went out of their way to insure faucet installation after initial install proved defective. Associate went extra mile and drove approximately 25 miles away to get another faucet and made successful installation."
Mitsubishi Ductless
Furnace install
Water filtration
Stretching out during a hvac install
New heat pump and furnace

+50

Response time11 hrs
Response rate97%
26 neighbors recently requested a quote
Avatar for Ace Hardware Home Services
Ace Hardware Home Services
4.5(
53
)
Central A/C - Install

Serving Lexington, MA and surrounding areas

Approved (Corporate)

In business since 1967

Free estimates

Emergency services offered

"We could not have been more pleased. We needed to replace our first floor AC, which is a split-type ductless system, about 17 years old. We had an idea of what the cost would be from an online site: [*** Link removed ***] We got 4 bids, 3 from A rated Angie's List contractors to install a Mitsubishi system (top of the line). Except for one, which was off the charts, the bids weren't that far apart. While Unique was not the lowest bid, we chose them for three reasons: (1) Jason (their rep) was the most savvy about the Mass Save and Mass CEC Air Source rebates, which were quite significant (he handled all the rebate paperwork for us); (2) Unique was able to do the job in a week; and (3) Unique included all the electric work into the total bid (rewiring was required). The installation team (John and Quinn) was excellent. It took them a day and half, They were quiet, neat, professional, highly respectful of our homes and proud of their work. We had worried that they would have to remove wooden ductwork which had been recently painted, but they managed to snake the new hoses through the existing ductwork without disturbing anything. Unique had an electrical contractor on site who replaced the breakers on our electrical panel, installed a higher capacity wire from the panel to the AC system, and replaced the cutoff switch on the outside. We were quite pleased with Unique's work, and would definitely recommend them to others."
Heat Pump
Mitsubishi Hyper Heat
Multiple Ductless Heat Pump Installation
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+6

Response time1 day
Response rate100%
4 neighbors recently requested a quote
Avatar for Milltown Plumbing, Heating, AC, Drain Cleaning & Electrical
Milltown Plumbing, Heating, AC, Drain Cleaning & Electrical
4.4(
200
)
Central A/C - Install

Serving Lexington, MA and surrounding areas

Approved

In business since 1979

Credit card accepted

Customers say: Super punctual

"My whole experience in dealing with Milltown was nothing but pleasurable. Their office staff are so professional and courteous. They were very accommodating to my scheduling needs, and even called a half hour before their actual arrival. My air conditioning unit is a bit old and it needed more than just a tune-up unfortunately. The servicer was very helpful in letting me know exactly what was wrong and how I he could fixed it and keep the cost down. He also showed me things about the air conditioning unit that I could do on my own to keep it running efficiently. I was very happy with everything Milltown Plumbing did for me and I would highly recommend there services."
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8 neighbors recently requested a quote
Recommended by87%of homeowners
Avatar for Atlantic Heating & Air Conditioning
Atlantic Heating & Air Conditioning
4.1(
153
)
Central A/C - Install

Serving Lexington, MA and surrounding areas

Approved

In business since 1962

Free estimates

Emergency services offered

"It was quite a surprise to find black mold growing in our mini-split heat-pump/ac units over the weekend! The situation was quite dire with the system emitting a bad smell and the fact that I have asthma and mold allergies which posed a serious health risk! After being told by the company that originally installed the system, “We don’t provide deep cleaning service for these units, try looking on Angie’s List (boo on Sila!)” I landed here. While other companies did respond to my bid, Atlantic Heating and Air Conditioning was the most responsive and was able to send out a team on one day’s notice (the wait for other service providers was up to three weeks!). The tech team, Josh and Zack, arrived on time and called me 1/2 before arrival as promised. They were very respectful, kept a clean work space and (since we are in the middle of a pandemic) wore masks and were very careful about the usual COVID protocols. The four units in our home are now SPARKLING CLEAN! We are 110% pleased with this job!! We will hire Atlantic as need be in the future for our heating and cooling needs. I have given up on the company that originally installed the units and will post a truthful review about them in an appropriate space online. I would definitely recommend Atlantic to family and friends. (photos attached to this review show one of the units before cleaning - did not think to take after pictures. Suffice it to say, no more mold:)"
Response time3 days
Response rate100%
4 neighbors recently requested a quote
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