1
Carini Heating, Air and Plumbing Editor's pick
Best for: Ductless mini-split and heat-pump installs
Mitsubishi Elite Diamond Contractor specializing in ductless mini-split systems.
Est. 2006✓ CSLB #887621San Diego
Best HVAC Companies in San Diego (2026)
Whether you're replacing an aging AC system or adding a heat pump for year-round comfort, the right San Diego HVAC contractor pairs proper load sizing with strong manufacturer support. Local summers make a properly sized AC system worth getting right, and each company below is licensed with a deep, verifiable review history.
At a glance
| # | Company | Rating | Reviews | Since | Best for |
|---|---|---|---|---|---|
| 1 | Carini Heating, Air and PlumbingSan Diego | ★★★★★ | 1,024 | 2006 | Ductless mini-split and heat-pump installs |
| 2 | Hamel's Air Conditioning & HeatingLa Mesa / Lakeside | ★★★★★ | 300 | 1965 | A long-established, multi-generation local company |
| 3 | Progressive Heating & AirSan Diego | ★★★★★ | 241 | 2006 | 24/7 emergency AC and heating repair |
| 4 | Bill Howe Plumbing, Heating & AirSan Diego | ★★★★★ | 5,192 | 1980 | Whole-home service from a large local provider |
| 5 | Action Air Conditioning, Heating & SolarSan Marcos | ★★★★★ | 354 | 1975 | Combined HVAC and solar projects |
| 6 | ASI Hastings Heating, Air & SolarSan Diego | ★★★★★ | 1,418 | 1952 | Established full-service HVAC, plumbing and solar |
Ordered by our editorial score. Ratings reflect public review data as of June 2026. See how we rank →
The 6 best HVAC companies in San Diego
2
Hamel's Air Conditioning & Heating
Best for: A long-established, multi-generation local company
Third-generation family business since 1965; repeat winner of the Union-Tribune Readers Poll.
Est. 1965La Mesa / Lakeside
3
Progressive Heating & Air
Best for: 24/7 emergency AC and heating repair
Family-owned with 24/7 service and EPA-certified technicians averaging ~40 hours of training a year.
Est. 2006✓ CSLB #997079San Diego
4
Bill Howe Plumbing, Heating & Air
Best for: Whole-home service from a large local provider
San Diego family-owned since 1980 with one of the largest verified review bases in the county.
Est. 1980✓ CSLB #970643San Diego
5
Action Air Conditioning, Heating & Solar
Best for: Combined HVAC and solar projects
About 50 years in business across San Diego and Riverside counties, with integrated solar.
Est. 1975✓ CSLB #1083840San Marcos
6
ASI Hastings Heating, Air & Solar
Best for: Established full-service HVAC, plumbing and solar
One of San Diego County's longest-operating home-service companies, serving the area since 1952.
Est. 1952✓ CSLB #513115San Diego
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What to look for in a San Diego HVAC company
- An active CSLB contractor's license with the right classification for HVAC work — verify it free at https://www.cslb.ca.gov/.
- NATE-certified or factory-trained technicians and a manufacturer 'Elite/Premier' dealer status.
- A written Manual J load calculation so the system is sized to your home, not over-sold.
- Clear maintenance-plan terms and genuine emergency availability for peak season.
What it costs
A complete central AC or heat-pump system replacement usually lands in the mid-to-high four figures and up, driven by system tonnage, efficiency rating and ductwork condition. Ask for a Manual J load calculation, not a rule-of-thumb estimate.
Frequently asked questions
Who is the best HVAC company in San Diego?
In our 2026 review, Carini Heating, Air and Plumbing ranks first, with a 4.8-star rating across 1,024+ reviews plus strong licensing and credentials. Hamel's Air Conditioning & Heating and Progressive Heating & Air round out the top three. See the full ranking and our scoring method below.
How much does it cost to replace an AC system in San Diego?
A complete central AC or heat-pump replacement typically starts in the mid-to-high four figures and rises with system tonnage, efficiency and ductwork condition. Insist on a Manual J load calculation rather than a rule-of-thumb estimate.
Should I get a heat pump or a traditional AC in San Diego?
Heat pumps handle both heating and cooling in one efficient system and are increasingly popular for local climates. Several companies in this guide install both — ask each for a side-by-side cost and efficiency comparison for your home.
How did VettedBest rank these HVAC companies?
We weigh active CSLB licensing, verified review volume and rating, years of local experience, and manufacturer certifications such as NATE or factory-dealer status. Placement cannot be purchased.