24/7 support
Fully licensed & Insured
Fully guaranteed
Trusted technicians
Upfront pricing
No surprise fees
24/7 support
Fully licensed & Insured
Fully guaranteed
Trusted technicians
Upfront pricing
No surprise fees
We deliver complete ductless mini-split system solutions for Hillsborough, NH, homeowners.
Getting started is simple. We come to you, assess your space, and build a system around your home.
Our installation team arrives prepared and handles everything from the first step to the last with care for your home.
Ongoing Support & Maintenance
We don't leave until you feel confident. And we're still here long after the job is done.



Diamond Elite is not a title any contractor can claim. It reflects a consistent record of technical training, quality installations, and customer satisfaction verified by Mitsubishi Electric. Bergeron Mechanical Systems has earned it and is recognized as a Top Contractor nationwide.
Bergeron Mechanical Systems opened its doors in 1973 and has remained family-owned and operated ever since. That longevity reflects something simple: homeowners keep coming back and referring their neighbors.
Separate systems for heating and cooling mean separate costs, separate maintenance, and separate headaches. A Mitsubishi Electric mini-split simplifies everything into one system that covers your home year-round.
Mitsubishi Electric's standard warranty covers parts for 12 years. Bergeron Mechanical Systems adds 12-year labor coverage to complete the picture. Together, this is the Total Home Comfort Warranty, full coverage for 12 years so homeowners can focus on comfort, not costs.
Carolyn M.
John, Pete and Adam did an excellent installation this morning of the Mitsubishi Minisplit. 4 hours start to finish attention’s to detail, good explanations and highest level of professionalism.
Melissa H.
Highly recommended for heat pumps. From initial meeting with Monique we were given information and advice to get the best option for us. The installation team of John, Mitchell, Nils, and Lincoln were efficient and professional. They took care in our home and were friendly and helpful.
Christina L.
The Bergeron team showed up to install mini-splits at our house. What a great team. They were very pleasant, helpful efficient, and we highly recommend their services. In particular, I want to call out Lincoln, Adam, Mitchell, Justin, John, Nils, and Peter. Thank you! See you next time.
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