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Cornerstone Heating & Air

HVAC Pros · 3659 Main St, Boston, MA 02108

4.9 (469 reviews) · 37 years in business
  • Licensed & Insured
  • ⚡ 24/7 Emergency
  • BBB Accredited
  • License #MA-375286

Call now: (221) 951-4962

About Cornerstone Heating & Air

Founded in 1989, Cornerstone Heating & Air has built a reputation in Boston, MA as a straight-shooting well-respected hvac contractor that doesn't push system replacements when a repair will do. The team is unusually rigorous about indoor air quality and ventilation work in addition to core heating and cooling, and is one of the few local shops that will quote both a repair and a replacement option on the same visit so homeowners can make an informed call. NATE-certified, state-licensed, EPA refrigerant-handling certified, and proudly insured.

Cornerstone Heating & Air serves homeowners across Boston, MA and surrounding ZIP codes including 02108, 02115, 02125, 02127, 02130. Pricing is up-front and quoted in writing before any work begins, with no obligation if the estimate isn't right for your project.

Services offered

  • Smart thermostat install
  • Furnace install & repair
  • Indoor air quality systems
  • Central AC install & repair
  • Spring & fall tune-ups
  • Ductwork design & sealing
  • Ductless mini-split install

Service area

Cornerstone Heating & Air covers Boston and the surrounding metro, typically responding to addresses within 25–35 miles of 02108. Same-day appointments are commonly available for non-emergency requests booked before noon, and 24/7 emergency dispatch is offered for active leaks, electrical hazards, no-heat/no-cool calls, and lockouts when applicable.

Licensing & insurance

FixNearMe verifies that Cornerstone Heating & Air holds an active MA contractor license (#MA-375286) and carries general liability insurance covering work at residential properties. We re-verify licensing annually and remove any pro whose status lapses or whose review pattern deteriorates.

How to request a quote

Use the free quote form on this page to send your job details directly to Cornerstone Heating & Air and up to two other nearby hvac pros in Boston. You'll receive up-front written quotes — usually within an hour during business hours — so you can compare apples to apples before booking.

Recent customer reviews

★★★★★
Came out for a second opinion after another company tried to upsell us into a $9,000 job. Turned out to be a $400 fix. Fair, knowledgeable, and respectful.
— Megan L., Boston
★★★★★
They diagnosed an issue three other contractors had missed. Fixed it in two hours and didn't charge for the diagnostic visit. Easy 5 stars.
— Karen W., Boston
★★★★★
Used them twice now. Always punctual, polite, and the work has held up perfectly. Saving them in my phone for next time.
— Priya S., Boston

Other HVAC Pros in Boston

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Cornerstone HVAC

HVAC Pros · Boston, MA 02127

5.0 (255 reviews)
  • Licensed & Insured
  • 10+ Years
  • BBB Accredited

Cornerstone HVAC is an established locally-owned hvac contractor serving homeowners across Boston, MA since 1989. Services include central AC and furnace install and repair, heat pump conversions, ductless…

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