Air Conditioning Installation, AC Installation & AC ReplacementLunenburg, MA, Mont Vernon, NH, Ashby, MA, Dunstable, MA, Greenville, NH & Milford, NH

From the planning stage to replacing old or starting from scratch, air conditioner installation requires lots of important decisions. Make, model, features, sizing, and installation procedures all impact the long-term satisfaction from your investment. As a family operated business, Absolute Mechanical Systems never underestimates the importance of every last detail. Established in 1998, we draw from proven exceptional equipment, follow meticulous start-to-finish procedures and customize design to suit your specific requirements.

Top Quality A/C System Installations & Replacements

Call on Absolute Mechanical Systems at (603) 249-9800 for air conditioner installation done right. We not only cater to the age, size, and style of your home, but take advantage of industry innovations to optimize system management, temperature distribution, sound levels, air quality, efficiency, and much more. We put absolute control at your fingertips, allowing room-by-room adjustment from your smartphone, tablet, or laptop.

Give our team a call for all your air conditioner installation needs!

We optimize the overall comfort, cleanliness, health, and usability of your indoor space with a system that pays for itself through exceptional energy savings. Our standards of integrity are the key to a job done right and results you can trust 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

AC InstallationAir Conditioning InstallationAC Replacement

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