Top-Rated East Bay HVAC Companies
6 vetted contractors, thoroughly researched and ranked
Last Updated: January 25, 2026
Our Top Pick
Hassler Heating and Air Conditioning
License #770180 · Verified via CSLB
Diamond Certified for 12 consecutive years with a dual specialty as both a full-service HVAC contractor and home performance company—has helped customers secure over $5 million in energy rebates.
Platform Scores
(393)
(693)
A+
12 yrs
82%
NATE Certified
Factory Authorized Carrier Dealer
Nest Pro Dealer
Carrier Authorized
24/7 Emergency
25+ years in business, specializing in heat pump conversions and home electrification for Bay Area homes with complex HVAC needs. Diamond Certified for 12 consecutive years with exceptional rebate expertise—has helped customers secure over $5 million in energy rebates since 2010. Best for homeowners seeking premium, full-service HVAC work with expert guidance on energy upgrades and incentive programs.
Essential Q&A
What makes them stand out?
Diamond Certified for 12 consecutive years with a dual specialty as both a full-service HVAC contractor and home performance company—has helped customers secure over $5 million in energy rebates.
Who should hire them?
Bay Area homeowners with older or architecturally complex homes seeking premium, comprehensive HVAC service with expert guidance on electrification and available rebates.
Insider tip
Ask about their VIP Club Membership for 15% off repairs and schedule during non-peak seasons for faster appointment availability.
Platform Scores
(1,207)
(561)
A+
9 yrs
77%
Diamond Certified
Elite Pearl Certified
Angi/HomeAdvisor Screened & Approved
Lennox Premier Dealer Authorized
Daikin Comfort Pro Authorized
24/7 Emergency
Family-owned HVAC company founded in 2015 with 10 years in business, specializing in residential heating, cooling, and electrical services across Alameda and Contra Costa Counties. Reviews consistently praise their knowledgeable technicians who explain work thoroughly, arrive on time, and clean up meticulously. Best for homeowners seeking a community-focused contractor with strong manufacturer relationships and responsive emergency service.
Essential Q&A
What makes them stand out?
Family-owned operation with owner Chris Donzelli personally involved, 9 consecutive years Diamond Certified with 341 verified customer surveys, and multiple SFGATE Best of Bay Area awards for both HVAC and electrical services.
Who should hire them?
Homeowners in Alameda or Contra Costa County seeking a responsive, community-minded contractor with strong manufacturer relationships and comprehensive service plans.
Insider tip
Ask about their maintenance program that includes real-time updates and technician reminders—satisfied customers consistently mention the thorough bi-annual inspections as key to avoiding breakdowns.
Platform Scores
(1,035)
(341)
A+
19 yrs
83%
NATE Certified
BPI GoldStar Contractor
Diamond Certified
Lennox Premier Dealer Authorized
Carrier Factory Authorized Dealer Authorized
24/7 Emergency
40 years in business (since 1985), specializing in residential and commercial HVAC services across the East Bay. Distinguished by 19 consecutive years of Diamond Certified status with 491 verified customer surveys and consistently praised for honesty, integrity, and refusing to upsell unnecessary services. Best for homeowners who prioritize proven reliability and quality workmanship over rock-bottom pricing.
Essential Q&A
What makes them stand out?
19 consecutive years of Diamond Certified status with 491 verified customer surveys and a documented pattern of refusing to recommend unnecessary repairs—multiple reviews cite technicians honestly saying 'you don't need that' when other contractors pushed expensive replacements.
Who should hire them?
Homeowners who value long-term reliability and ethical business practices over lowest price, particularly those wanting comprehensive explanations of their options without high-pressure sales tactics.
Insider tip
Ask for Ron T. (frequently praised by name in reviews) for service calls, and schedule maintenance appointments outside of peak summer season when they're less busy and appointment wait times are shorter.
Platform Scores
(716)
(434)
A+
10 yrs
Factory-Trained Technicians
Bryant Authorized
24/7 Emergency
In business since 2008, AIS Heating & Air Conditioning is a family-owned HVAC contractor specializing in residential and commercial heating, cooling, and indoor air quality services. Reviews consistently praise their knowledgeable technicians who explain work clearly, hands-on owner involvement, and professional service. Best for Bay Area homeowners seeking a reliable, established contractor with verified quality credentials and performance guarantees.
Essential Q&A
What makes them stand out?
Diamond Certified for 10 consecutive years with a hands-on owner who personally oversees quality control on every job, distinguishing them from larger corporate HVAC operations.
Who should hire them?
Bay Area homeowners who value transparent communication, quality workmanship backed by performance guarantees, and prefer working with a family-owned business rather than a large franchise.
Insider tip
Request Art Miner for consultations—he's repeatedly praised for thorough explanations and no-pressure recommendations—and ask about their Comfort Protection Plan for ongoing maintenance discounts.
Platform Scores
(2,440)
(436)
A+
12 yrs
79%
EPA Certified Technicians
Diamond Certified
Trane Authorized
Rheem Authorized
24/7 Emergency
Family-owned HVAC contractor with 13 years in business, Diamond Certified for 12 consecutive years. Reviewers consistently praise technicians for thorough explanations and same-day responsiveness. Best for East Bay homeowners seeking a well-established, highly-rated contractor with strong warranty backing and emergency availability.
Essential Q&A
What makes them stand out?
12 consecutive years of Diamond Certification with 457 verified customer surveys and family ownership that spans two generations, combining industry veteran experience with modern management.
Who should hire them?
Homeowners in Contra Costa, Alameda, or Solano counties who prioritize working with an established, highly-reviewed contractor and value thorough explanations of system options and repairs.
Insider tip
Ask for their Star Performance Membership which includes two annual system tune-ups and 20% off non-warranty repairs; multiple reviewers mention their technicians are excellent at explaining options without pressure selling.
Platform Scores
(11)
(38)
A+
71%
NATE Certified
Carrier Authorized
IQAir Authorized
96 years in business since 1929, Berkeley's longest-operating family-owned HVAC contractor with Carrier and IQAir authorizations. Reviews consistently praise owner Jeff Geier's personal involvement, knowledgeable technicians, and quality craftsmanship. Best for East Bay homeowners who prioritize reliability and expertise over rock-bottom pricing.
Essential Q&A
What makes them stand out?
Family-owned since 1929 with owner Jeff Geier personally diagnosing issues and standing behind work—one review noted they replaced an original Aarvaks furnace installed in the 1930s.
Who should hire them?
East Bay homeowners in older homes who value established reputation, personalized service, and heat pump expertise over the lowest bid.
Insider tip
Ask for Jeff directly for complex diagnostic issues—multiple reviews praise his patience in troubleshooting by phone before dispatching a technician, potentially saving a service call.