The wide range of weather in Southern New Hampshire and parts of Massachusetts makes energy efficiency a priority. You need a tightly sealed home to prevent waste and drafts. With little opportunity to open windows, contaminants are trapped inside, and everything from moisture levels, cleaning agents, and personal hygiene products to pesticides, pets, and home furnishings add to indoor air quality concerns. Absolute Mechanical Systems specializes in whole-home and sustainable solutions. As a family owned and operated business, we make the health, comfort, and safety of your family our priority.

Expert Indoor Air Quality Services

Call on our NATE-certified technicians at (603) 249-9800, whether you’ve got specific complaints, are unsure of the problem, or taking precautionary measures. Our specialists draw from a broad range of innovative options to effectively address any challenge. Tucked out of sight, virtually silent, efficient, and low in maintenance, air purifiers, heat recovery ventilators, germicidal UV lamps, humidifiers, and dehumidifiers accommodate any size home, type of HVAC system, or air quality issue. We offer customized recommendations and complete prompt and proper installation. Look no further than Absolute Mechanical Systems for a full range of Indoor Air Quality services 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