Your hot water heater is an important aspect of everyday life. Whether you’re looking for new construction installation, conversion to tankless, replacement, proactive maintenance, or repair of all makes, models, or styles, Absolute Mechanical Systems is the right choice in Southern New Hampshire and parts of Massachusetts. We combine licensed professionals with top quality equipment, state-of-the-art technology, and extensive in-field experience. We know generic answers never add up to complete satisfaction. By customizing our services to suit the specific demands of your household, we save you time and ensure plenty of clean, hot water, whenever and wherever you need it.

Expert Hot Water Heater Services, Repairs & Installations

Contact Absolute Mechanical Systems at (603) 249-9800 for prompt response. We don’t keep you waiting, and organized project management avoids disruption and mess. Our licensed technicians discuss options, prioritize efficiency, and draw from industry-leading innovations to optimize reliability, durability, and longevity. Along with a full range of expert water heating services, Absolute Mechanical Systems remains on call 24/7 for Emergency Repair 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