Providing Comfort Since 1981. 24/7 Emergency Services Available! 
Stay Comfortable All Year-Round Trust Our Team to Handle Your Heating, Cooling & Electrical Repairs & Installations

Now part of the Cotti-Johnson Family!

At Middlesex Cooling & Heating, we've been delivering comfort to homes and businesses across Massachusetts for over 70 years. And our commitment is the same. We are here for you: yesterday, today, and tomorrow.

The health, safety, and peace of mind of our clients and our employees is our top priority. Here you will find the safeguards we're taking to ensure the well-being of our customers and our team during the developing outbreak of COVID-19.

Should you have any questions or concerns about the precautions we are taking, please don't hesitate to call 508-214-4445


Adam Boccalini, President

Middlesex Cooling & Heating

Our Commitment for HVAC Visits During COVID-19

life preserver ringSafety Comes First
If one of our technicians notices any symptoms of illness, they will be told to stay home and self-quarantine.

hand sanitizer Disinfectant
Our team will be wearing fresh gloves to each home visit as well as carrying and using hand sanitizer regularly.

hands being washedHand Washing
Technicians are required to wash their hands before & after each customer visit.

People social distancingDistancing
To reduce person-to-person contact, we will not be shaking hands. Our team will maintain a safe distance during their visit.

Electrician & HVAC Contractor in Marlborough, MA

Reliable 24-Hour Emergency AC & Heating Repair, Installation & Maintenance in Middlesex County

For over 35 years, Middlesex Cooling & Heating, Inc. has specialized in the installation, maintenance, and service of residential air conditioning and heating systems.

Our decades of experience and dedication to customer service qualify us to represent the premier manufacturers in the industry—American Standard, Bosch, Bryant, and Mitsubishi Electric.

We also have highly trained electricians in Marlborough on staff, and offer the complete line of Honeywell-Generac stand-by home generators.

Call (508) 214-4445 or contact us online today schedule fast & dependable service with our electricians or HVAC contractors in Marlborough, MA!

  • Contact Our Team

    Use our online form or call (508) 214-4445 for same-day & 24/7 emergency service.

  • Get Your Free Estimate

    We provide upfront pricing and you will know the cost of the job before we start.

  • We Handle the Rest

    Our technicians are trained, drug-tested and background checked.

Our Customers Say It Better!

Customer Reviews
  • Overall they were great and will use again in the future!

    “I was able to get an appointment quickly which is always a bonus. He was very prompt to the appointment time and friendly.”

    - Erin D.
  • We will absolutely use them again and highly recommend them.

    “Middlesex was very responsive and prompt to our needs.”

    - Jennifer Z.
  • He will be the guy I call whenever I need a plumber.

    “I can't thank Fred enough for taking the time to give me that advice.”

    - K M.
  • I highly recommend this company for heating and AC.

    “The price I was quoted was the price I paid and the work was done in a timely manner. This is my second experience with this company and I no complaints.”

    - Debra H.

Trusted Heating & Air Conditioning Specialists

Our HVAC contractors and electricians in Marlborough believe in providing high-quality service and exceptional customer care. To that end, we stand behind everything we do. We don’t consider a job complete until you’re completely happy with our work, and we care about your long-term satisfaction as well.

Our goal is to create meaningful, lasting relationships with our customers so that next time you need heating, air conditioning, or electrical services in Marlborough or the surrounding areas, you know who to call.

As Mitsubishi Diamond Contractors, we offer the highest levels of warranty coverage—up to 10 years on newly installed equipment. We are also Aprilaire Indoor Air Quality Specialist certified and belong to the Air Conditioning Association of New England and the Air Conditioning Contractors of America.

Contact us today to schedule a free site evaluation and estimate. Our highly trained electricians and HVAC contractors in Marlborough can provide you with the most efficient and cost-effective solution for your home comfort and electrical needs.

We offer same-day services, as well as numerous financing options and we are affiliated with the Mass Save program.

Request high-quality service with our trusted HVAC contractors & electricians in Marlborough, MA, by submitting a contact form online or calling (508) 214-4445 today!

Contact Us 24/7

We'll Take Care of the Rest! 
Call (508) 214-4445 
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