For Dunbarton, NH homeowners looking to move off propane and oil, a Mitsubishi Electric mini-split brings heating and cooling together in one system that runs all year. As a Mitsubishi Electric Elite Diamond Contractor, Bergeron Mechanical Systems designs and installs each one to fit the home it serves.
Rural properties and homes without existing ductwork are a natural fit throughout Merrimack County, and every installation carries a 12-year parts-and-labor warranty on all Mitsubishi Electric related components.
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
From the first design conversation to a completed installation, Bergeron Mechanical Systems handles your full mini-split project.
It begins with a visit, not a phone quote. During your Free Design Consultation we go room by room, see how your current propane or oil heat is holding up, and measure what your home needs. Then we lay out the Mitsubishi Electric options that fit and follow up with a Free Estimate, no pressure either way.
From there, our technicians take over and manage the installation from start to finish. They work carefully inside your home and keep things tidy as they go, then test the system thoroughly before considering the job complete. You'll get a clear walkthrough of how to run it before they head out.
Dedicated Ongoing Support
We stick around after the keys are handed over. Bergeron Mechanical Systems is here for the systems we install, so whenever you need a hand down the line, you reach the same people who know your setup. That continuity is part of what you get when you work with us.



Diamond Elite is the top tier a Mitsubishi Electric contractor can reach, and Bergeron Mechanical Systems has earned it. Getting there takes continuous factory training and a record of installations done to the manufacturer's standards, year after year. Working with a Mitsubishi Electric Elite Diamond Contractor means your system is set up the way Mitsubishi Electric intended, and the team behind it has direct support from the manufacturer.
Bergeron Mechanical Systems has spent over five decades as a family-owned business, working in homes throughout New Hampshire and Vermont. That kind of history means you're hiring a team that knows the area well and isn't going anywhere.
A Mitsubishi Electric mini-split heats and cools from the same system, so you're comfortable in July and January alike. There's no second unit to run or maintain, just one efficient setup that adapts to what your home needs through the year.
Your coverage comes from two places: Mitsubishi Electric stands behind the parts, and Bergeron Mechanical stands behind the labor. The result is a 12-year parts-and-labor warranty on all Mitsubishi Electric related components.
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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