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Professional HVAC technician servicing a furnace
★ 4.3 on Google · Owner-Operated Since 2014

Bellingham's Trusted HVAC Contractor for Heating & Air Conditioning

Owner-operated HVAC company in Bellingham, MA since 2014. We repair, replace, and tune up gas and oil furnaces, boilers, central AC, and ductless systems across MetroWest, with a quote before any work begins.

Call (508) 282-1000 Request an Estimate

Complete HVAC Services

Heating, air conditioning, and indoor air quality for homes, plus light commercial work. Every job starts with an upfront quote, so you know the number before we touch anything.

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No heat or no cooling? Emergency service is available.

Call (508) 282-1000 — we pick up when we can, and if we miss you we call right back.

ACCA Member
EPA Section 608 Certified
Fully Stocked Vans
Owner-Operated
Paul Hannon, 30+ Years in HVAC
Emergency Service Available
HVAC technician adjusting a smart thermostat

Why Customers Choose Hannon

With over 30 years in the HVAC trade, Paul Hannon founded this company in 2014 on a simple idea: treat every customer the way you'd want to be treated. That hasn't changed.

  • Upfront Pricing: You get a clear quote before any work begins, and that is the number you approve.
  • Fully Stocked Vans: Our trucks carry the parts and tools for most repairs, so we fix it in one visit.
  • Owner-Operated: Paul is on every job. You talk to the person doing the work.
  • EPA Section 608 Certified: We hold EPA Section 608 certification for refrigerant work and belong to ACCA.
  • All Brands Serviced: We work on every make and model, whoever installed it.

What We Do

The same company that installs your system services it. This is the work we do every day.

PurePro oil boiler with a Beckett burner against an exposed brick basement wall

Bellingham Heating Contractor

Furnaces, boilers, and oil heat are the core of our winter work: repairs, replacements, and annual tune-ups on gas and oil systems alike. Paul has worked on oil heat for over 30 years, so oil burner cleanings, Roth-certified oil tank replacements, and oil-to-gas conversions are everyday jobs for us. See everything we do on the heating services page, or call for a straight answer on whether your system is worth fixing.

Bryant air conditioning condenser on a composite pad beside a brick chimney

Air Conditioning Contractor

We install and replace central air systems across MetroWest, and we put in a lot of ductless mini-splits. They suit the older homes around Franklin and Milford that were built without ductwork, and they heat as well as cool. System replacements start with a free estimate and honest sizing for your actual house. Compare your options on the air conditioning page.

Goodman gas furnace with labeled combustion air intake and exhaust runs

Furnace Repair Service

No-heat calls come first in a New England winter. We diagnose and repair gas and oil furnaces of every brand, and our vans carry the common parts, so most repairs are finished in one visit. When a repair no longer makes sense on an older unit, we tell you and price the replacement honestly. Read what a furnace repair visit covers before you call.

Refrigerant gauges connected to a Goodman condenser during service

Air Conditioning Repair Service

When the AC quits during a July heat wave, we move fast: same-day service whenever the schedule allows, on all makes and models. Plenty of "dead" systems just need a capacitor or a good cleaning, and we fix those on the spot rather than quoting a new unit. Our AC repair page covers the most common failures we see.

PurePro oil boiler with three purge stations beside a water heater

Boiler Installation & Repair

Baseboard and radiator heat runs on a boiler, and we work on all of them: gas and oil, hot water and steam. We handle emergency repairs, annual cleanings, and full replacements when an old boiler has run its course, and we supply and install the new equipment ourselves. Start with the boiler repair page, or ask about replacement options if yours is past twenty years.

Proudly Serving MetroWest Massachusetts

Based in Bellingham, we provide reliable heating and air conditioning services to homes and businesses across 24 communities in MetroWest and the Blackstone Valley.

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What Our Customers Say

Google Reviews

4.3 from 45 reviews

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  • Matt DiVenere

    July 2026

    Rated 5 out of 5

    Honest, reliable and masters of their trade. I found myself in a very unpleasant situation with a very well-known local HVAC company and was desperately calling other companies for help and advice. Not only did the team at Hannon answer my call, they came right out to inspect my central AC, diagnosed the problem, the cause of it, ordered the parts and had it up and running again before the first company EVEN CALLED ME BACK. The communication was fantastic and the customer service was second to none. They are, by far, the best HVAC company in the surrounding area. I highly recommend them for all of your HVAC issues and repairs.

    Read the full review on Google

  • Lauren P

    July 2026

    Rated 5 out of 5

    Hannon Heating and Air Conditioning does fantastic work! I just had them replace my furnace and clean my air conditioner. Paul and Dorian were on time and very professional. In this day and age, it’s so nice to work with a company that is honest, thorough and has fair pricing. Hannon Heating and Air is my go-to for anything related to my HVAC system. I highly recommend them!

    Read the full review on Google

  • David Vlacich

    July 2026

    Rated 5 out of 5

    Paul at Hannon Heating and Cooling is as good as it gets. Fantastic communication, extremely friendly, and 100% trustworthy. It’s rare to find technicians this reliable and honest. Wouldn’t hesitate to call him again or recommend him to neighbors!

  • Molly G

    February 2026

    Rated 5 out of 5

    We had a huge issue with our furnace and it stopped working. Came out very quickly and spent the day making sure we could get our heat back. Very important with a baby in the house! Thank you!

  • Matthew Samost

    April 2025

    Rated 5 out of 5

    Paul is simply the best to work with! He’s now done mini-splits, water heater, and our annual furnace cleanout for multiple years. Incredibly responsive, very fair pricing, and gets work done quickly and efficiently. Highly, highly recommended!

  • Timothy Norton

    March 2025

    Rated 5 out of 5

    Did a great job taking out my old ac system and put in a new one. Very honest. A controller had an issue and he replaced it. Told me it was caused by him and it would not cost me anything. Most contractors would have just charged for it. Would recommend him to anyone

Ready for Reliable HVAC Service?

Call about a repair, a tune-up, or a straight quote on a replacement. You'll talk to the person who does the work.

(508) 282-1000 Request an Estimate

Mon-Fri 7am-5pm · Emergency Service Available