If you really care about choosing a quality hvac contractor, we’re here for you. Here’s your access to the best hvac contractors serving Sunnyvale including 94087, 94086, 94085, 94089 and 94088. These heating and air conditioning experts provide HVAC installation and HVAC troubleshooting, and they also work on HVAC upgrades, heating and indoor air quality. For 22 years we’ve conducted the most accurate ratings and deepest research of local contractors, so you’ll be confident in choosing.
Last Updated Mar 04, 2026
148,521 people sourced companies in Heating & Air Conditioning
16,331 Verified Heating & Air Conditioning Customers Surveyed
San Jose Heating & Cooling installs and removes insulation, repairs and installs HVAC systems, cleans attics and crawl spaces, and provides other serv...
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Main Services
Insulation
Heating & Air Conditioning
Additional Services
Insulation Removal & Installation, HVAC Installation & Repair, Air Duct Repair & Replacement, Attic & Crawl Space Cleaning, Radiant Barriers
Air Care Heating & Cooling, Inc. provides a variety of services that are designed to improve indoor air quality for residential and commercial clients...
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Main Services
Heating & Air Conditioning
Additional Services
HVAC Maintenance, Installation & Repair, Duct Inspections, Indoor Air Quality
Brands
Bryant, Mitsubishi
Coverage Areas
Santa Clara County, Milpitas, San Jose, Sunnyvale, Santa Clara, Mountain View, Palo Alto, Cupertino, Los Altos, Gilroy
Air Sharks LLC provides a wide range of HVAC services for residential clients throughout the South Bay. In addition to installing, repairing, and main...
Bayhill Heat & Air, Inc. is an HVAC (heating, ventilating and air conditioning) contractor that serves homeowners in San Mateo, Santa Clara, Alameda a...
Service Champions is a premier provider of home services in Northern California. The company's expertise includes heating, cooling, plumbing, electric...
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Main Services
Air Duct Cleaning
Heating & Air Conditioning
Air Quality - Indoor
Insulation
Additional Services
Furnaces and Air Conditioners, Ductwork and Insulation, Electrical, Plumbing, Water Filtration, Air Filtration
Valley Heating, Cooling, Electrical and Solar installs and services all brands of air conditioners, heat pumps, furnaces, fan coils, filtration system...
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Main Services
Heating & Air Conditioning
Additional Services
Air Conditioning, Heating and ElectricalSolar System Installations, Electrification, Heat Pumps, Water Heaters, Solar System Installations, Duct Cleaning, Testing and Sealing, Dryer Vent Cleaning, Zoning Systems, Filtration, Fireplace Inserts, Residential and Light Commercial
Brands
Lennox, Mitsubishi, American Standard, Bryant, Carrier, Trane
Coverage Areas
Santa Clara County,
San Mateo County,
Parts of Santa Cruz County,
Parts of Alameda County
Diamond Certified Hvac Contractors Serve These Sunnyvale ZIP Codes
94087, 94086, 94085, 94089, 94088
Diamond Certified Hvac Contractors In Sunnyvale
Diamond Certified hvac contractors serving Sunnyvale are rated an average of 4.5 out of 5 stars based on 6508 reviews of 79 rated hvac contractors. Diamond Certified hvac contractors in Sunnyvale Avg. Star Rating.
Sunnyvale was founded in 1850, and today, your 145,945 neighbors enjoy mud baths, pottery classes, community events, motorcycling and paddle boarding. Sunnyvalians use Diamond Certified HVAC contractors for indoor air quality, AC tune ups, HVAC replacement, furnace repair, energy-efficient HVAC work, and more.
Frequently Asked Questions for Heating & Air Conditioning in Sunnyvale, CA
Q: What are clients of Diamond Certified hvac contractors saying about contractors in Sunnyvale, CA?
A: Verified San Jose Heating & Cooling Customer, 1 of 17 "Really nice, good service, good prices, and they came at the right time when I asked. Some companies will only come out in the morning or afternoon, but they came when I asked. I am happy. Their timing" - Ronnie M. All Survey Responses for San Jose Heating & Cooling Verified Air Care Heating & Cooling, Inc. Customer, 1 of 109 "Joey, the owner, has a very high standard. He can take care of things that other people can't get done. For example, our neighbor was told that the compressor in their yard could not be moved and it was very visible. Joey came out with his crew and they moved it completely out of site. His policy is not to sell people new units. He has a high level of integrity. If there is a problem, he will look at it, think about it, come up with a solution and tell his guys how to do it. It is always the perfect solution. My wife does a lot of cooking and her kitchen gets warm. I asked him if there was some way to put a vent in there to cool down the kitchen. He was able to come up with a good solution and one that most people would not know how to do. I can't say enough good things about him." - Richard B. All Survey Responses for Air Care Heating & Cooling, Inc. Verified Air Sharks LLC Customer, 1 of 88 "Just make sure the person that comes to you is correct, because the last guy gave me quote, and I was happy with that, but guy before that was bad. They already fired him. I love Dimitri, my service technician." - Paul G. All Survey Responses for Air Sharks LLC Verified Bayhill Heat & Air, Inc. Customer, 1 of 286 "The job site was very clean and tidy. They came as scheduled and were very professional and neat. They gave me their cell phone number if I had any questions." - Daniel C. All Survey Responses for Bayhill Heat & Air, Inc. Verified Service Champions Customer, 1 of 7955 "They are very reliable, service is well done, and we have never had any problems. We know the quality of the service we will get when we work with them. They are punctual, they care about their work, they do a good job, and we have never had any problems with our heating and HVAC system with them." - Nicholas Y. All Survey Responses for Service Champions Verified Valley Heating, Cooling, Electrical and Solar Customer, 1 of 480 "They do what they say they're going to do, and they're not a hard sell. They're a bit pricier than others, but you have a choice not to purchase what they're selling you. You can go somewhere else as a choice for some cheaper parts or new unit. I had to replace our heater. It's easy to get an appointment when you need it. They are here when they say they're going to be here, and they don't take any unnecessary time. It's convenient. They do a great job, and they do everything that needs to be done." - Ineke B. All Survey Responses for Valley Heating, Cooling, Electrical and Solar
Q: What are some of the most popular brands that Diamond Certified hvac contractors use when working with Sunnyvale residents?
A: Diamond Certified hvac contractors use top-quality brands like Panasonic, York, LG Electronics, Payne and Heil.
Q: What types of AC tune ups do hvac contractors offer?
A: HVAC contractors typically offer two types of AC tune ups: preventive maintenance and emergency maintenance. Preventive maintenance includes tasks such as changing and/or cleaning air filters, checking the refrigerant level, measuring temperatures and pressures, checking the electrical connections, and lubricating moving parts. Emergency maintenance is typically used when an AC system is not functioning properly and needs immediate attention. This type of maintenance includes inspecting for refrigerant leaks, checking the compressor, and ensuring belts and other components are working properly.
Q: Can Diamond Certified hvac contractors work with Carrier products and similar items so I can get HVAC installation in Sunnyvale?
A: Yes, Diamond Certified hvac contractors in Sunnyvale can work with Carrier products and similar items for HVAC installation.
Q: What did people search for when they wanted to find the best quality hvac contractors in Sunnyvale?
A: Air Filtration
Hvac Upgrades
Ductless Heating And Cooling Systems
Heating System Installations
Hvac Repairs
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Downtown Sunnyvale is known for its modern architecture and welcoming community atmosphere. Photo: Sundry Photography