Highest Rated · Hartford
Top-Rated HVAC Companies in Hartford, CT
Every business ranked by real customer ratings. The pros at the top earned it — through consistent service, not advertising spend.
As of May 2026, RatingsNearMe ranks 19 hvac companies in Hartford, CT by verified customer ratings and review volume. The highest-rated is Degree Heating and Cooling with a 4.8-star rating from 1,447 verified reviews. Also in the top tier: SM Mechanical Services LLC and HARP Home Services - Air Conditioning, Heating, Plumbing, & Electrical. The average rating across all listed hvac companies in Hartford is 4.6 stars from 492 reviews per business on average.
HVAC service in Hartford: $75–$150/hr for repairs; full system replacement $4,000–$12,000 depending on size and efficiency.
Rankings updated May 17, 2026 · Scored by ratings (35%), review volume (30%), sentiment (20%), completeness (10%), availability (5%) · Not paid placement.
Local Market Snapshot
19
Businesses listed
4.6★
Avg rating
492
Avg reviews
May 17, 2026
Last updated
Top Rated HVAC Companies
Degree Heating and Cooling
160 Oak St #508, Glastonbury, CT 06033, USA
SM Mechanical Services LLC
75 Naubuc Avenue Rear Unit, Glastonbury, CT 06033, USA
HARP Home Services - Air Conditioning, Heating, Plumbing, & Electrical
863 Marshall Phelps Rd, Windsor, CT 06095, USA
HVAC Companies Rankings in Hartford, CT
| # | Business | Rating | Reviews |
|---|---|---|---|
| #1 | Degree Heating and Cooling160 Oak St #508, Glastonbury, CT 06033, USA | 4.8★ | 1,447 |
| #2 | SM Mechanical Services LLC75 Naubuc Avenue Rear Unit, Glastonbury, CT 06033, USA | 4.8★ | 653 |
| #3 | HARP Home Services - Air Conditioning, Heating, Plumbing, & Electrical863 Marshall Phelps Rd, Windsor, CT 06095, USA | 4.5★ | 4,316 |
| #4 | Ugo DiGrazia Air Conditioning and Heating, Inc.436 Franklin Ave, Hartford, CT 06114, USA | 4.9★ | 366 |
| #5 | East Hartford Heating & Cooling366 Tolland St, East Hartford, CT 06108, USA | 4.1★ | 54 |
| #6 | Hi-TECH Mechanical Services LLC143 Vanderbilt Ave, West Hartford, CT 06110, USA | 5.0★ | 90 |
| #7 | Deitch Energy LLC40 Woodland St, Hartford, CT 06105, USA | 4.0★ | 70 |
| #8 | Ideal Mechanical Services LLC74 Nedwied Rd, Tolland, CT 06084, USA | 5.0★ | 390 |
| #9 | Johnstone Supply255 Locust St, Hartford, CT 06114, USA | 5.0★ | 8 |
| #10 | Town Oil Company, Inc.786 Silas Deane Hwy, Wethersfield, CT 06109, USA | 4.8★ | 122 |
Ranked by verified ratings & review volume · Data from Google Business listings · Updated May 2026
All HVAC Companies in Hartford
Ugo DiGrazia Air Conditioning and Heating, Inc.
436 Franklin Ave, Hartford, CT 06114, USA
East Hartford Heating & Cooling
366 Tolland St, East Hartford, CT 06108, USA
Hi-TECH Mechanical Services LLC
143 Vanderbilt Ave, West Hartford, CT 06110, USA
Deitch Energy LLC
40 Woodland St, Hartford, CT 06105, USA
Ideal Mechanical Services LLC
74 Nedwied Rd, Tolland, CT 06084, USA
Johnstone Supply
255 Locust St, Hartford, CT 06114, USA
Town Oil Company, Inc.
786 Silas Deane Hwy, Wethersfield, CT 06109, USA
Hartford HVAC Co
1185 Main St, East Hartford, CT 06108, USA
Crest Mechanical Services Inc
41 Walnut St, Hartford, CT 06120, USA
Heating & Cooling
160 Shield St, West Hartford, CT 06110, USA
Sid Harvey Industries - HVAC/R Specialist Distributor
206 Murphy Rd, Hartford, CT 06114, USA
Becker's HVAC & Electrical Services LLC
60 Central Ave, Bloomfield, CT 06002, USA
Connecticut Cooling & Heating, Inc.
244 Woodland Ave, Bloomfield, CT 06002, USA
Heating & Cooling Hartford
456 Park St, Hartford, CT 06106, USA
West Hartford HVAC: Heating & Air Conditioning
333 N Main St, West Hartford, CT 06117, USA
Biozura Heating and Air
10 N Main St #377, West Hartford, CT 06107, USA
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Frequently Asked Questions — HVAC Companies in Hartford
How do I find the best hvac companies in Hartford?
Look for businesses with 4.5+ stars, 50+ verified reviews, proper licensing and insurance, and transparent pricing. The top-ranked hvac companies in Hartford on this page are scored by our algorithm that weighs ratings, review count, and profile completeness.
Are hvac companies in Hartford licensed and insured?
Licensing requirements vary by trade and state. For most home service contractors, CT requires both a state license and liability insurance. Always ask any contractor for proof of current insurance and a copy of their license number before work begins — you can verify most licenses on your state licensing board's website.
How much do hvac companies charge in Hartford, CT?
Prices vary by scope, materials, and contractor experience. Use the free quote form on this page to request estimates from multiple local pros simultaneously. Getting 3+ quotes is the single most effective way to avoid overpaying.
What should I look for when hiring a hvac companies in Hartford?
Verify licensing and insurance, read recent reviews on multiple platforms, ask for a written estimate before work starts, confirm they pull permits when required, and check references from recent local projects. Featured businesses on this page are ranked by verified ratings and review quality.
How are the hvac companies on this page ranked?
Rankings use a transparent algorithm: star rating (35%), review volume (30%), customer sentiment (20%), profile completeness (10%), and availability (5%). Featured Partner listings have paid for enhanced visibility but must still earn their position through real customer reviews — sponsored listings are clearly labeled.
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How Rankings Work on This Page
Every hvac companies on RatingsNearMe is scored transparently: star rating (35%), review volume (30%), customer sentiment (20%), profile completeness (10%), and availability (5%). Businesses labeled exclusive or premium are Featured Partners — they have paid for enhanced visibility but must still rank through real customer reviews. We cap sponsored boosts so bad businesses can never buy the top spot.
Editorial notice: Ratings are based on publicly available data from Google Business listings. Consumers should independently verify licensing, insurance, and credentials before hiring any service provider. Last updated: May 17, 2026.
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