Absolute Mechanical Systems provides new construction design and installation in Southern New Hampshire and parts of Massachusetts. Contact us at (603) 249-9800 for organized project management, seamless completion, and results you’ll be happy to live with, year after year. Our extensive resources ensure the right answer to any challenge, goal, and requirement. No matter the size or style of your residential or commercial property, we cater to your specifications and offer unmatched control over your indoor environment.

Trustworthy New Construction HVAC Services

As a family operated business, Absolute Mechanical Systems completes the design/installation process without delays. We maintain an open line of communication, provide guidance without pressure, and recommend only top quality and reliable equipment. Our NATE-certified technicians focus on exceptional energy efficiency, evenly distributed temperature, integrity of air quality, and a system that answers demand, caters to your lifestyle, and holds up year after year. No matter the type of heating/cooling system you’re interested in, Absolute Mechanical Systems exceeds expectations for quality and value throughout Brookline, NH, Hollis, NH, Milford, NH, Townsend, MA, Pepperell, MA, Amherst, NH, Wilton, NH, Mont Vernon, NH, Greenville, NH, Groton, MA, Ashby, MA, Dunstable, MA, Lunenburg, MA, and Nashua, NH.

Serving Southern New Hampshire and parts of Massachusetts

Our Happy Customers

Don’t take our word for it, here’s what our clients have said about Absolute Mechanical Systems

Write a Review

We were so pleased with the service and attention to detail. The staff and installers were amazing.

J. Faucher

Outstanding service second to none. Quick response, and never a hassle. They do quality work at a better than fair price. Highly recommend for heating and ac needs.

D. Gorgolione

Without question, the very best experience I’ve ever had with any specialty service business. If you live anywhere near Brookline and are in need of these types of services, I strongly recommend going to Absolute first.

S. Huffman

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Special Offers

If you're looking for more value from your HVAC contractor, Absolute Mechanical Systems will deliver it. Browse our current specials and see how you can save.

More Special Offers

With new installation of Furnace & AC you get TWO FREE items below:

Whole house air cleaner
Humidifier
Programmable Thermostat
Wifi Thermostat


(603) 249-9800

Not valid with other offers or prior services.

With new installation of Furnace you get ONE FREE item below:

Whole house air cleaner
Humidifier
Programmable Thermostat
Wifi Thermostat


(603) 249-9800

Not valid with other offers or prior services.

Complete Residential & Light Commercial HVAC Services