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28 Years
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Emergency
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Expert HVAC Services in Southern New Hampshire
Established in 1998, Absolute Mechanical Systems has built a reputation as a trusted family-owned HVAC company serving Southern New Hampshire and parts of Massachusetts. Our NATE-certified technicians specialize in residential and commercial heating, cooling, and air quality solutions, offering installation, repair, and maintenance services for all system types. We partner with industry-leading manufacturers like Rheem and Aprilaire to deliver reliable, energy-efficient systems tailored to client needs. With 24/7 emergency service availability and comprehensive maintenance plans offering 10% parts discounts, we prioritize customer satisfaction through transparent communication and skilled workmanship.

Our team undergoes background checks and receives ongoing training to maintain technical expertise across HVAC, water heating, and indoor air quality solutions. For over 25 years, we've combined personalized service with technical excellence, serving homeowners, businesses, and industrial clients across 15+ communities. Our commitment to quality extends to financing options that make system upgrades accessible while maintaining rigorous safety and performance standards. Absolute Mechanical Systems operates from our Brookline, NH headquarters with a focus on long-term client relationships and community service.
Services
HVAC Installation Air Conditioning Repair Heating Service Commercial HVAC Indoor Air Quality Boiler Services Ductless Systems Heat Pump Installation Maintenance Plans Emergency Repairs
Details
  • Year established: 1998
Highlights and features
  • Family-owned since 1998 with 25+ years of local HVAC expertise
  • NATE-certified technicians for superior technical proficiency
  • 24/7 emergency service available across 15+ communities
  • Partnerships with leading manufacturers like Rheem and Aprilaire
  • 10% maintenance plan discounts on parts and labor
Associations and certifications
  • NATE-certified
What people say
Outstanding service Quick response Quality work Best experience Highly recommend
Services
HVAC Installation
We provide complete HVAC system installations for residential and commercial properties. Our NATE-certified technicians handle all makes and models, ensuring proper sizing and energy efficiency. With manufacturer partnerships and code-compliant installations, we deliver long-lasting comfort solutions backed by warranties.
Emergency Repairs
Our 24/7 emergency repair service addresses urgent HVAC issues across Southern New Hampshire and Northern Massachusetts. Trained technicians respond promptly with fully equipped vehicles to restore system functionality and prevent further damage during critical temperature conditions.
Maintenance Plans
Preventive maintenance programs include seasonal system checkups to optimize performance and longevity. Plans feature 10% parts discounts and $5/hour labor savings while reducing breakdown risks through expert inspections and tune-ups performed by certified technicians.
Indoor Air Quality
We install and service Aprilaire Healthy Air Systems to address indoor air contaminants. Solutions include air purifiers, humidifiers, and ventilation systems that improve respiratory health and comfort by removing pollutants and maintaining optimal humidity levels.
Commercial HVAC
Full-service commercial HVAC solutions cover design, installation, and maintenance for businesses and industrial facilities. Our team handles system upgrades, seasonal maintenance, and emergency repairs for all equipment types while minimizing operational disruptions through scheduled service windows.
Questions
What HVAC services do you offer?
We provide complete heating, cooling, and air quality solutions including installation, repair, maintenance, and 24/7 emergency service for residential and commercial systems.
Do you serve areas outside Brookline?
Yes, we serve Southern New Hampshire communities including Milford, Nashua, Amherst, and parts of Northern Massachusetts like Pepperell and Townsend.
Are financing options available?
Yes, we offer financing plans to help customers manage HVAC system upgrades and installations with flexible payment options through approved lenders.
What maintenance plan benefits exist?
Our maintenance plans include seasonal system checkups, 10% parts discounts, $5/hour labor savings, and priority scheduling for emergency service calls.
How quickly can you respond to emergencies?
Our 24/7 emergency service responds promptly to critical HVAC issues, with technicians available year-round to restore system functionality as quickly as possible.
Reviews (5)
Karen Steuer
Feb 12, 2022 Report
Woke up to furnace not working properly. Called to either have a walk-through of issues or have someone come out to take a look. They installed furnace in 2020, serviced in 2021. Now, no longer servicing my area (no notice) and was told to call someone else. Not pleased. ETA: More local? We are 20 minutes away from you. I know you said you're short staffed and I can empathize. But from a customer's perspective, having had two heating systems installed by your company (including taking recommendations on said systems) within two years --and thousands of dollars -- and being told you no longer service my community (that's what you said first, then said you were short staffed) was a shock.

Maybe when you make those decisions in the future (ceasing to serve smaller towns), notify the loyal customers that are impacted so that when they call, needing your service and support, they aren't blindsided and given a short "Sorry."
Kale Stenersen
Jan 10, 2022 Report
I have had great experiences with Absolute Mechanical. They installed my HVAC system with a Hybrid Heat Pump/Gas Furnace and I've had it for 5.5 years now and I still like the system. I have had a couple small things come up, which might be typical with a system over a 5.5 year period, and Kevin is always very responsive. Shawn and Shaun did the majority of the work on the installation and were great to work with. Carl came out and serviced the system at one point and was respectful in the home. A great experience overall for sure.
Philip Bouchard
Dec 20, 2021 Report
I am a first time customer. Day one was to service my oil-fired furnace. During the servicing Mike found an issue that could be a problem during the winter. The next day they submitted a quote, found the items needed to correct issue, came back to my house and fixed the problem. WOW! THANK YOU ABSOLUTE MECHANICAL
Andy Giroux
Dec 07, 2021 Report
They are great. Our furnace would not run and needed work, but we asked if they could do a new install for us. They fit us in that night and worked after hours to get it done. No issues so far and everything is working great. We are so grateful and could not recommend them more.
Buz Off
Sep 04, 2021 Report
Mixed experience. Outstanding on split duct installation. Oil burner maintenance, sometimes goes well, other times not so good (maintenance service broke its previously fine operation). Could use service, again, and but find I'm now apprehensive. Services: AC installation, Heating system repair, Heating maintenance