We Specialize in the Comfort and Efficiency of Your Home or Business

We are a family-owned and operated company, established in 1976. As the Monadnock Region’s trusted Mitsubishi Electric Diamond Contractor, we specialize in the sale, installation and maintenance of Mitsubishi Electric ductless systems, a line of quiet and powerful heating and cooling solutions known for their efficiency and customized comfort.

As opposed to conventional, fossil-fueled systems, Mitsubishi Electric ductless solutions not only benefit our planet, but save you money as well. The efficient technology of a ductless system can pay for itself in energy savings.

If you’re looking for a new heating or cooling solution to keep you comfortable night and day, season to season, you’re in the right place.

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A Family-Owned & Operated HVAC Contractor
You Can Trust
No Problems, Just Solutions

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What our customers are saying

"The team from Bergeron Mechanical were fantastic from the moment I reached out to them. Professional, skilled, and detailed. Their level of communication kept me informed and up to date throughout the whole project."


Jean-Pierre Bernier

"The Bergeron team is amazing. During COVID they took precautions that made me feel completely safe while they were in my home. Their work is impeccable. They make sure that you are receiving quality products and services."


Kathryn Berta

"The team at KEBMS combines state of the art technical know how with an attentive customer focused approach. I'm building my own home. KEBMS was easily the best sub-contractor on the entire project."


Tony Diehl
Green HVAC

Many of our systems are ENERGY STAR qualified and may be eligible for federal and state tax credits or local utility rebates.


We actively participate in LEED certified projects

As a Mitsubishi Diamond Elite Dealer, All Systems We Sell Come Backed With a 12 Year Warranty

As you consider your HVAC maintenance needs during the constantly changing landscape of COVID, you can rest assured that at KEBMS we are adopting the latest protocols and C.D.C. recommendations when it comes to keeping our employees and customers safe.

If you have special requests while our service experts are in your home, please let us know and we will be happy to accommodate. We are now also offering complimentary virtual estimates. Fill out our quick form to get started. Our top priority is your health and safety.

Brands We Offer:
K.E. Bergeron Truck

Heating Repair, AC Service & A/C Maintenance
Swanzey, NH, Keene, NH & Chesterfield, NH

As a second generation family company, K. E. Bergeron Mechanical Systems, LLC provides superior value throughout Keene, NH and surrounding areas. You’ve probably seen our service trucks in your area. We handle the full range of industrial, commercial, and residential HVAC requirements, from new installation to upgrades, seasonal maintenance, and repair. For every job, we uphold uncompromising levels of professionalism and quality. We’re simply not satisfied unless you are.

Dependable Heating & Cooling Services From An Expert Team!

Contact us at 603-563-8305 for a prompt response. We take advantage of new digital dispatch software to avoid delays. Our team of EPA certified, Natural/LP gas licensed, highly trained and experienced technicians are prepared for any challenge across Keene, Swanzey, Chesterfield, Walpole, Peterborough, NH, and Southern Vermont. As a Mitsubishi Diamond Elite Dealer, we are leaders in ductless split design and implementation, and we specialize in Indoor Air Quality.

Give our team a call for all your HVAC repairs, maintenance & installations in Keene, Swanzey, Chesterfield, Walpole, Peterborough, NH, and Southern Vermont!

At K. E. Bergeron Mechanical Systems, LLC, we deliver exceptional return from your investment through a job done right. No corners get cut, no details overlooked. We obtain building permits for all work. Give us a call at 603-563-8305. No Problems, Just Solutions!

Air Conditioner Repair & A/C Maintenance in Chesterfield, NH

HVAC ServiceAC InstallationHeating Repair