Get matched with top central a/c installers in Harwich, MA

At Monomoy Mechanical, LLC, we are a local company specializing in Heating and Cooling installs to maximize rebates and efficiency. \n\nWe have over 30 years of combined HVAC and Plumbing knowledge and started here on Cape Cod, graduating from Cape Cod Tech.

Hello. With 16 years in the HVAC business, I recently decided to start my own company! Well experienced in all things pertaining to mechanical system’s of all kinds. From service, to replacements, to new installs we’ve got you covered! Licensed and insured.

"BEWARE OF THIS COMPANY I purchased a brand-new heating system for $15,000 in September 2025. The system came with a one-year company warranty in addition to the manufacturer?s warranty. Despite being new, the system malfunctioned four times within less than six months ? on December 4, December 6, December 17, 2025, and again on February 14, 2026. Why would a brand-new $15,000 heating system fail four times in less than six months? Each time I called the company, the response was slow. I later learned they do not provide evening, weekend, or emergency service. This was during the heart of winter, and I was completely at their mercy to service a system that was still under warranty. When I requested to speak with a manager, I was consistently blocked. The secretary or office staff always had an excuse as to why no manager was available. There was never an opportunity to address my concerns directly with leadership. The company presents as polished and professional when selling the"

"Although 50 miles from my house A1 was there within two days which was impressive with the "hot" season in full swing. Extremely friendly and knowledgable.. Gave advice for the future of my system (mini-splits) and what I could expect."

"These people are HIGHLY professional and do the work RIGHT AWAY! Very reasonable prices! Would hire again!"

Family owned & operated since 1986

"We absolutely will use them again! They arrived when they said they would and did great work on our historic home. Historic homes can bring challenges to companies working on them. All difficulties were handled quickly and perfectly. We found their rates to be the best around. I look forward to doing more projects with L&G Heating and Air Conditioning."

"Excellent service-prompt and professional. The job was done at my mother’s home, a couple thousand miles away from mine. Matt kept me informed throughout the process, and his team got the job done quickly, efficiently, and at a very reasonable cost."

Family owned business with over 12 years of experience handling all your Heating & AC needs for residential and commercial. Master certified HVAC.

"Jerry was very communicative and explained everything very clearly. He arrived on time, completed the work quickly, and was affordable. Overall we are very happy with his service!"