When you choose quality, you live better

New Hampshire HVAC
Experts For 50+ Years

Air conditioning, Heating, High-Efficiency HVAC
Solutions, and Solar

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Keene, US
1:20 pm, Jan 23, 2026
weather icon 25°F
L: 23° | H: 27°
overcast clouds
Humidity: 49 %
Pressure: 1018 mb
Wind: 8 mph W
Wind Gust: 0 mph
UV Index: 0
Precipitation: 0 mm
Clouds: 100%
Rain Chance: 0%
Visibility: 10 km
Sunrise: 7:12 am
Sunset: 4:49 pm
  • Temperature
  • Precipitation
  • Rain Chance
  • Wind
  • Humidity
  • Pressure

Spread Comfort & Joy This Holiday

Nominate a Keene, NH homeowner whose heart warms our community to receive a single zone Mitsubishi Electric Heating & Air Conditioning system

Submit your nomination by December 15

loader-image
Keene, US
1:20 pm, Jan 23, 2026
weather icon 25°F
L: 23° H: 27°
overcast clouds
Humidity: 49 %
Pressure: 1018 mb
Wind: 8 mph W
Wind Gust: 0 mph
UV Index: 0
Precipitation: 0 mm
Clouds: 100%
Rain Chance: 0%
Visibility: 10 km
Sunrise: 7:12 am
Sunset: 4:49 pm
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London, GB
6:20 pm, Jan 23, 2026
46°F
L: 46° | H: 48°
Humidity: 83 %
Pressure: 986 mb
Wind: 14 mph ESE
Wind Gust: 0 mph
UV Index: 0
Precipitation: 0 mm
Clouds: 75%
Rain Chance: 0%
Visibility: 10 km
Sunrise: 7:51 am
Sunset: 4:32 pm

YOUR COMFORT IS OUR PRIORITY!

Please fill out the form and we will contact you shortly.

Our High-Efficiency HVAC
Services in New Hampshire

Heat Pumps &
Mini-Split Systems
Solar Energy
Systems
Indoor Air Quality
Services

Heating Solutions in New Hampshire

For over 50 years, Bergeron Mechanical Systems has specialized in Mitsubishi Electric mini-split systems and New Hampshire heating services, ensuring homes stay warm through New England winters.

Our services include:

Air Conditioning & Cooling Solutions in New Hampshire

Stay cool during humid summers with our expert cooling New Hampshire services. As a Mitsubishi Electric Diamond Elite Contractor, we offer top-tier air conditioning solutions with a 12-year parts and labor warranty. Our services include:

Our services include:

Explore The
Comfort Zone

The Monadnock Region’s First and Only Mitsubishi Electric Ductless HVAC Showroom!

Why the NH Community Has Trusted Us for Over 50 Years

Family-Owned and Operated

As a family-run business, we’re committed to giving each project and customer the personal care and attention they deserve.

Customer Satisfaction Comes First

With over 300+ five-star reviews, it’s clear that we go the extra mile to make sure our customers are happy.

Certified Experts

As a Mitsubishi Electric Diamond Elite Contractor, we offer top-tier ductless mini-split systems with the added peace of mind of a 12-year parts and labor warranty.

Full Range of HVAC Services

From installations to repairs and maintenance, we offer everything you need to keep your heating, cooling, and air quality systems in shape.

Fully Interactive Showroom

Our “Comfort Zone” showroom lets you experience Mitsubishi Electric’s ductless systems up close before deciding.

Going Green

We’re passionate about sustainability and do our part by participating in environmentally-friendly initiatives.

Commitment to Excellence

Bergeron Mechanical Systems is committed to excellence in workmanship and customer service through our four core principles:

Safety

The health and safety of our team members and our customers is always our top priority.

Quality

Our team members are expected to perform at the highest level, using only the best quality materials available.

Delivery

We take fulfilling our mission and commitment to our customers very seriously. We are not satisfied unless you are.

Price

We charge what is required to provide high quality products and workmanship, while being a sustainable, growing business and responsible employer.

Brands & Partnerships

The Diamond Elite Difference

As a Mitsubishi Electric Diamond Elite Contractor, we represent the top tier of quality and service. We earn our “Elite” designation by ensuring that our certified technicians are trained with up-to-the-minute information and skills for the installation and service of Mitsubishi Electric systems, offering our extended warranty, and maintaining the highest level of customer satisfaction.

HVAC Tax Incentives & Fuel Costs

If you’re considering upgrading your HVAC system in New Hampshire or Vermont, your Bergeron Mechanical Systems Design Consultant can show you the HVAC rebate and incentive programs available in your area.

Whether for residential or commercial projects, our team provides you with access to help you maximize incentives while upgrading your comfort.

Heating Cost Table: Residential Energy Use in New Hampshire and Vermont

System Type

Estimated Annual Cost

Efficiency Level (*)

Oil Furnace

$2,713 per year¹

Low – typically 80–85% efficient

Propane Heating

$2,164 per year²

Moderate – ranges from 70–95% depending on system age and maintenance

Modern Electric HVAC (Heat Pump)

≈ $1,480 per year³

High – up to 300% efficiency (COP 2.5–3.5)

(*) Source: U.S. Energy Information Administration (EIA)

Free initial
consultation

We work with you to determine the most efficient design to meet your comfort needs at a cost that represents a value to you.

Your design consultation is obligation-free and costs you nothing except an hour or so of your time.  You’ll have a complete installation proposal, with no hidden costs, in hand before we leave.

Some exclusions may apply. Call for more details.

Saving You Money & the Environment:

Why Choose High-Efficiency HVAC Systems

1
Free Design Consultation
Air-source heat pumps can reduce energy use by up to 30% since they move heat instead of generating it. (Source: U.S. Department of Energy).
2
Lower Carbon Emissions
Heat pumps cut carbon emissions by at least 20% compared to gas boilers. (Source: International Energy Agency)
3
Better Indoor Comfort

High-efficiency systems improve temperature control and air quality, maintaining comfort even in colder climates.

4
Financial Incentives

Homeowners in New Hampshire can qualify for rebates and incentives through programs like ENERGY STAR®.

The Impact of Choosing a Quality HVAC Contractor in New Hampshire

Did you know that 90% of HVAC units are installed incorrectly, wasting energy and making your home less comfortable? 

That’s why choosing the right contractor matters! We’re part of the 10% that gets it right every time. When you go with a professional, your HVAC in New Hampshire will be properly installed and running at its best to save you money and keep your home comfy all year.

The Locally Trusted Choice for Over Half a Century

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.

Contact us

Please fill out the form and we will contact you shortly.

Free Resources for New Hampshire Home and Business Owners

Benefits of Installing a Heat Pump: 2025 Homeowner Guide

If you’re weighing an upgrade, heat pumps...

THE IMPORTANCE OF CHANGING AIR FILTERS REGULARLY

As a homeowner, it’s easy to overlook...

Before You Go, Let’s Talk Comfort

Book your free design consultation now.

No pressure, no hidden costs—just expert guidance tailored to your home.