Furnace Installation, Furnace Replacement & Heating InstallationWilton, NH, Hollis, NH, Ashby, MA, Nashua, NH, Pepperell, MA & Groton, MA

Whether you’re installing new, replacing old, or simply in the planning stages, call on Absolute Mechanical Systems at (603) 249-9800 for honest recommendations, a wide selection of proven products, and unequalled integrity of job performance. Our standards of quality add up to greater value from your investment. There’s no need to deal with delays, settle for generic solutions, strain your budget, or live with major upheaval. Established in 1998, Absolute Mechanical Systems combines organized project management with a personalized approach to provide seamless completion and a perfect end result.

Expert Heating System Installations

No matter the age, size, or style of your home, our NATE-certified technicians work to your specifications, prioritizing system efficiency, sound levels, reliability, safety, and longevity. We make luxury affordable through industry innovations such as adaptable speed technology, WiFi connectivity, and zone control.

Give our team a call for all your heating installation needs!

While you enjoy superior and more evenly distributed temperature, the system pays for itself in energy savings. As a family run company, Absolute Mechanical Systems remains dedicated to the satisfaction and comfort of our clients 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

Furnace ReplacementFurnace InstallationHeating Installation

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