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28 Years
experience
Emergency
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Trusted HVAC Services in Southern New Hampshire
Since 1998, Absolute Mechanical Systems has been a trusted provider of comprehensive HVAC solutions for residential, commercial, and industrial clients across Southern New Hampshire and parts of Massachusetts. As a family-run company, we prioritize customer satisfaction through reliable heating, cooling, and air quality services. Our NATE-certified technicians deliver expert repairs, installations, and maintenance using industry-leading products from partners like Rheem and Aprilaire.

With 24/7 emergency service and flexible financing options, we ensure year-round comfort and peace of mind. Our commitment to quality workmanship, competitive pricing, and personalized service has earned us a reputation as a local leader in HVAC excellence.
Services
HVAC Installation Air Conditioning Repair Heating Service Commercial HVAC Indoor Air Quality Boiler Services Water Heater Installation Heat Pump Systems Maintenance Plans Emergency Repairs
Details
  • Year established: 1998
Highlights and features
  • We offer 24/7 emergency HVAC service for urgent heating and cooling needs
  • Our team consists of NATE-certified technicians with industry expertise
  • We partner with leading manufacturers like Rheem and Aprilaire for reliable equipment
  • Family-owned since 1998 with deep local market knowledge in New Hampshire
  • Flexible financing options available for HVAC system upgrades and installations
Associations and certifications
  • NATE-certified
What people say
Outstanding service Quick response Quality work Better than fair price Best experience
Services
HVAC Installation
We provide complete HVAC system installations for residential and commercial properties. Our NATE-certified technicians ensure proper sizing and efficient operation of heating, cooling, and air quality systems. Using premium equipment from trusted manufacturers, we deliver long-lasting solutions that enhance comfort while reducing energy costs.
Air Conditioning Repair
Our 24/7 emergency AC repair service addresses cooling system failures promptly. Technicians diagnose and fix refrigerant leaks, compressor issues, and electrical problems using factory-certified parts. We prioritize rapid response times to restore comfort during peak summer months across Southern New Hampshire and Massachusetts.
Heating Service
We offer comprehensive heating system maintenance and repair services for oil, gas, and electric furnaces. Our technicians perform safety checks, efficiency tune-ups, and emergency repairs to ensure reliable winter operation. Annual maintenance plans help prevent unexpected breakdowns and extend equipment lifespan.
Commercial HVAC
Our commercial HVAC solutions include system design, installation, and maintenance for businesses of all sizes. We service all equipment makes and models with minimal disruption to operations. Customized maintenance contracts help businesses maintain optimal indoor environments while managing energy costs effectively.
Maintenance Plans
Preventive maintenance programs cover bi-annual system inspections and tune-ups for heating and cooling equipment. Members receive priority scheduling, 10% parts discount, and $5/hour labor savings. Regular maintenance improves system efficiency, reduces repair risks, and extends equipment longevity.
Questions
What HVAC services do you offer?
We provide complete heating, air conditioning, and ventilation services including installation, repair, maintenance, and emergency services for residential and commercial clients.
Do you offer 24/7 emergency service?
Yes, we provide 24/7 emergency HVAC service for urgent heating and cooling system failures across our service areas.
Are your technicians certified?
All our technicians are NATE-certified with extensive training in modern HVAC systems and repair techniques.
What areas do you serve?
We serve Southern New Hampshire including Brookline, Nashua, Milford, and Amherst, plus parts of Massachusetts like Pepperell and Hollis.
Do you offer financing options?
Yes, we offer flexible financing options for HVAC system replacements and major repairs through approved credit programs.
Can you service all HVAC brands?
Our technicians service all makes and models of heating, cooling, and air quality systems regardless of brand or age.
Reviews (6)
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
Marty Bade
Aug 31, 2021 Report
I contacted three HVAC companies for a replacement of my existing heat pump system. Company A: supplied a quote on the spot and I next received a follow up that I should order now because of price increases in August. Company B: quote received within one day - discount if I signed before end of month. My experience with Kevin at Absolute Mechanical (family owned business) was excellent. Kevin came out examined the existing installation, we discussed several options regarding equipment capacity, warranties, and cost of ownership.

I graded all three bids using the following criteria: Quality of Equipment, confidence in the company personnel, and price. Hands down Absolute came in on top. Installation was scheduled and they arrived on time, Crew was professional, courteous, and completed the installation by early afternoon. I then had an inspection of their work, a tutorial on how to program and use the thermostat and later a follow up call regarding my experience. Even though other companies carry the same equipment, the deal maker for me was the personal interaction with the folks at Absolute Mechanical.