Verified record
Absolute Mechanical Systems Custom Heating & Cooling is a family-run HVAC company at 2 Quimby Road in Brookline, serving Southern New Hampshire and parts of Massachusetts. The company states it was established in 1998 and provides heating, cooling, air-quality, boiler, water-heating, installation, maintenance, and repair services for residential, commercial, and industrial customers. Customers describe furnace and boiler repairs, heat-pump and mini-split installations, air-conditioning work, water-heater replacement, and emergency troubleshooting. Reviews repeatedly praise prompt responses and professional work, including same-day emergency attendance and quick installations. The history is mostly positive but includes detailed complaints about refrigerant leaks, a propane-leak misdiagnosis, smoking after a tune-up, incomplete water-heater repair, and a customer told the company no longer serviced their area. Confirm current service-area coverage, warranty and labor terms, and the diagnosis and follow-up plan for safety-related furnace or gas issues before booking. The state registry lists HVAC license MBE1000622 as lapsed, so verify the current license applicable to the job. This is a reasonable fit for broad HVAC installation, repair, and maintenance in the Brookline-centered Southern New Hampshire area; request a current written estimate and confirm availability.
“Contact Absolute Mechanical Systems Custom Heating & Cooling 603-249-9800 (6032499800) ### Contact info ... Absolute Mechanical Systems Custom Heating & Cooling 2 Quimby Rd Brookline, New Hampshire 03033 - #### Phone 603-249-9800 (6032499800) ... We are a full service heating and air conditioning company serving our community and the surrounding area with the highest quality HVAC service & equipment. ... - 2 Quimby Rd Brookline, New Hampshire 03033 - 603-249-9800 (6032499800)”
This guy knows his stuff! Trust Mike for your HVAC needs. He did a great job fixing my leaky system.
Kevin and his amazing crew just put in some mini splits and they were great! Professional, on time and worked with us to install the proper sized units that also fit our budget Highly recommended!!!
What a great experience I had today. We set up appointment last week for Absolute to look at our leaky boiler. I spoke to the owner on the phone who suggested that I soak the area with penetrating oil in the hopes that the bolts would be able to be removed and the leak repaired instead of replacing the boiler. It worked! Needless to say, I was thrilled. I also had an AC unit that wasn’t functioning and I asked if he’d take a look at it. Long story short, a few minutes later that was fixed, I was presented with a very reasonable bill which I gladly paid. What an awesome experience. Thank you!!
Absolute Mechanical Systems installed 2 Fujitsu mini split heat pumps for me about 8 years ago. Both units developed refrigerant leaks in the indoor units condensers. Both internal condensers were supposed to be covered by 10 years warranty....I was advised that is not worth to pay for the labor cost for replacement. Now I have, new Mini split systems installed to replace the failed Fujitsu ones. The HVAC contractor pointed that previous HVAC contractor did not use stainless steel brackets and metal screws to secure PVC line cover kits to the house on outside. Brackets and metal screws rusted but spread the rust to the cooper lines eating thru the insulation. Who puts metal screws in exterior wood siding? They also did drill thru the outer wall without installing plastic liner so if any leaks the water will behind the drywall. Not impressed and the fact that they covered everting up is even worst. Crappy installation job by Absolute Mechanical Systems.
Incompetent workers lead by an owner unable to take criticism. It must be exhausting to be so perfect, but if I owned an HVAC company and one of my customers called to report that my worker completely MISSED a propane leak and misdiagnosed it as “litter box odor”, I’d probably take that call a little more seriously as opposed to becoming argumentative, and then accusing said customer of non-payment when he never even received an invoice. You’ve been paid now Kevin, about $2,000 dollars. Thank you so much for your unwavering professionalism and commitment to the customer
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Certified attributes are verified against the public registry. Others are the business's own statement.
2 changes recorded — last scanned Sep 14, 2026.
State-verified HVAC license4.2
Second opinions5.0
Heating upgrades5.0
Water heater work5.0
Boiler response4.2
Active NH license2.5