Best HVAC Companies in Livermore, CA
Tri-Valley heating and cooling contractors, compared
Part of our Bay Area best-of guides, lists for every city and service we cover.
Livermore has a strong set of long-running local HVAC companies, and five of the six we list after ourselves have a Livermore address.
At a glance
| # | Company | Based in | Focus | License |
|---|---|---|---|---|
| 1 | Cool Aid Air Conditioning & Refrigeration | Santa Clara | Residential and commercial HVAC, commercial refrigeration | C-20 & C-38 |
| 2 | OK Heating and Air Conditioning | Livermore | Residential HVAC, Bryant equipment, indoor air quality | #332447 |
| 3 | Miller's Air Conditioning & Heating | Livermore | Residential AC, furnaces, heat pumps, mini-splits, insulation, water heaters | — |
| 4 | Eagle Air Conditioning | Livermore | Residential HVAC, heat pumps, ductless, air filtration, duct cleaning | — |
| 5 | Richards Heating & Air Repair, Inc. | Livermore | Residential and commercial HVAC, heat pumps, ductless, sheet metal, water heaters | — |
| 6 | AIS Heating & Air Conditioning | Livermore / Fremont | Residential and commercial HVAC, heat pumps, ductless, energy audits | #1098502 |
| 7 | HR&M HVAC Services | — | Residential and commercial HVAC, wine cellar refrigeration | #1047255 |
License numbers are shown only where the company prints one on its own site. Check any contractor on the CSLB license lookup before you hire.
How we picked
We started from contractors that are based in or near Livermore or that name Livermore on their own website as a place they work. We then visited each company’s site to confirm what it actually offers and where it works. We left out lead-generation directories, businesses whose sites no longer load, and national chains with no local presence. We do not publish star ratings or review counts here: they change weekly, so read them on Google or Yelp at the time you hire.
The order after #1 reflects how close each company is to Livermore and how closely its services match typical Livermore homes. It is not a quality score, and no company paid to be included.
#1 — Cool Aid Air Conditioning & Refrigeration
Cool Aid is a family-owned HVAC and refrigeration contractor founded in 1966 and based at 3511 Thomas Rd in Santa Clara. We work on homes and businesses in Livermore for repair, replacement and maintenance, and we publish this list. We are not based in Livermore. For a routine tune-up, a company closer to home may be able to schedule you sooner, and several of them are listed below.
What stands out
- California C-20 (HVAC) and C-38 (refrigeration) licensed; EPA Universal certified technicians
- 24/7 emergency service for no-heat and no-cooling calls
- Furnaces, central AC, heat pumps and ductless mini-splits, plus commercial HVAC and refrigeration
- Every job backed by a 1-year parts & labor warranty
More about our work in Livermore: Livermore HVAC & refrigeration services.
#2 — OK Heating and Air Conditioning
Residential HVAC, Bryant equipment, indoor air quality.
What stands out
#3 — Miller's Air Conditioning & Heating
Residential AC, furnaces, heat pumps, mini-splits, insulation, water heaters.
What stands out
#4 — Eagle Air Conditioning
Residential HVAC, heat pumps, ductless, air filtration, duct cleaning.
What stands out
#5 — Richards Heating & Air Repair, Inc.
Residential and commercial HVAC, heat pumps, ductless, sheet metal, water heaters.
What stands out
#6 — AIS Heating & Air Conditioning
Residential and commercial HVAC, heat pumps, ductless, energy audits.
What stands out
#7 — HR&M HVAC Services
Residential and commercial HVAC, wine cellar refrigeration.
Its website does not publish a street address, so we have not listed a base city.
What stands out
What Livermore homeowners should know
- Livermore is in Ava Community Energy’s service area, with PG&E delivering the power. (Ava Community Energy)
- Tri-Valley summers are noticeably hotter than the bayside cities, so cooling capacity and attic duct condition matter more here than in San Jose or Palo Alto. Ask for a load calculation on any replacement.
- Depending on the work, a permitted HVAC change may need HERS testing, and you can hire an independent rater. (CEC on HERS testing)
How to choose an HVAC company in Livermore
- Check the license yourself. Look up the business on the CSLB site and confirm a C-20 classification for heating and cooling work.
- Get the permit in writing. The quote should say who pulls the permit and whether HERS testing is included. A price that leaves both out is not comparable.
- Ask for a load calculation on replacements. Sizing a new system from the old nameplate repeats whatever mistake was made last time.
- Compare the same scope. Equipment model numbers, duct work, electrical upgrades and warranty terms should all be written down.
- Ask about rebates before you sign. Some programs need approval before installation.
For more, see our guide to choosing an HVAC company in the Bay Area.
Frequently asked questions
Do I need a permit to replace a furnace, AC or heat pump in Livermore?
Almost always. In California, replacing a furnace, air conditioner or heat pump normally needs a mechanical permit from the local building department, and Livermore is no exception. Many changeouts also need a HERS rater to verify the installation, depending on the work. A licensed contractor should pull the permit for you and include it in the quote. (CEC on HERS testing)
Are there heat pump rebates in Livermore?
Programs change often, and several Bay Area incentives have closed or changed since 2024, so confirm what is open before you budget around one. Livermore is in Ava Community Energy’s service area, with PG&E delivering the power. (Ava Community Energy) Check Ava and BayREN for current offers, and see our Bay Area heat pump rebate guide for how the programs fit together.
How do I check an HVAC contractor’s license?
Search the company name or license number on the CSLB license lookup. Residential HVAC work needs a C-20 license. The lookup also shows the bond, workers’ compensation status and any disciplinary actions. If a company only gives you a number, check that the name on the license matches the business you are dealing with.
Does Cool Aid serve Livermore?
Yes. We serve Livermore from our Santa Clara base for residential and commercial HVAC and refrigeration, including 24/7 emergency calls. See our Livermore page or call 1-800-266-5243.
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