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(415) 944-0114

HVAC Services in Contra Costa County, CA

Heating, Cooling & Indoor Air Quality Experts for East Bay Homes

Contra Costa County’s diverse microclimates—coastal breezes in Richmond, warm valleys in Concord, and cooler hillside evenings in Orinda—require HVAC systems built for year-round comfort and energy efficiency. Bay Air Heating & Cooling delivers precision installation, repair, and maintenance for every home style, from mid-century ranches to modern hillside estates.

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Precision Installations for Every Home

We specialize in systems that perform flawlessly in the East Bay’s shifting temperatures:

  • Exact refrigerant charging calibrated for inland and bay-zone conditions

  • Tight duct sealing to reduce energy loss and humidity intrusion

  • Smart drainage and airflow design for long-term durability

  • Minimal-impact installation that preserves your home’s structure

Heating

Cooling

Water Heaters

Ductwork and Insulation

Indoor Air Quality

Commercial HVAC

Comprehensive HVAC Solutions

  • Heat Pump Systems – Efficient heating and cooling for Contra Costa’s mild winters and hot summers.

  • Ductless / Mini-Split Systems – Ideal for older homes without existing ducts or for room additions.

  • Indoor Air Quality Upgrades – HEPA filtration, UV lights, and humidity control for cleaner, healthier air.

  • Maintenance & Tune-Ups – Seasonal inspections to maximize system lifespan and prevent costly repairs.

  • Replacement & Smart Upgrades – High-efficiency equipment, zoning controls, and smart thermostats for optimal comfort.

 

Cost-Smart Upgrades with Local Rebates

Homeowners in Contra Costa County may qualify for energy-efficiency incentives through PG&E and East Bay Community Energy. We’ll help you:

  • Identify rebates and complete paperwork

  • Choose systems matched to your home’s size and climate

  • Reduce energy bills while improving indoor comfort

Swift and Reliable Service

When your heating or cooling system falters, we know every minute counts. Our rapid response ensures we address your HVAC needs quickly, preventing small issues from turning into major disruptions. With Bay Air, you’ll never be left in the cold-or the heat!

Fully Licensed, Bonded, and Insured

As a fully licensed, bonded, and insured HVAC provider, we offer professional expertise, financial protection, and comprehensive coverage for every project, meeting the highest standards of safety and quality.

Energy Efficiency Experts


We specialize in energy-efficient HVAC solutions that can save you 15-30% on your energy bills. From high-efficiency furnace installations to smart thermostat upgrades, we help homeowners reduce their carbon footprint while keeping their homes comfortable year-round.

Community-Focused Service

As a local business with 13 years of roots in Marin County and San Francisco, we’re deeply committed to our community. We take pride in supporting local initiatives and providing personalized HVAC care that meets the unique needs of Bay Area homes, ensuring your family’s comfort and safety with every service.

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Frequently Asked Questions

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Why Choose Bay Air for Contra Costa HVAC

  • Deep knowledge of Contra Costa’s microclimates

  • Complete heating, cooling, and air-quality solutions

  • Rebate and permitting assistance

  • Transparent communication & trusted technicians

Hear from our Clients

My 9-year-old HVAC system, originally installed by a different company, developed an issue. When I contacted the initial installer, they pressured me to replace the entire system rather than fixing the faulty coil, which was still under warranty. They also quoted an exorbitant labor fee for the replacement. I reached out to Bay Air Heating & Cooling, and Israel arrived to assist.

 

He accurately identified the issue, provided a clear explanation, and quoted a reasonable price for the repair. During the process, another component began to fail, but Israel quickly arranged for a replacement part and installed it at no additional cost. After dealing with an overpriced and unhelpful company, I’m incredibly grateful to Bay Air for their professionalism and care. I’ll definitely be calling them for future needs!

- Eli K.

Bay Air Heating & Cooling is the honestly the best! While preparing to sell my condo, the home inspection revealed that the AC wasn’t cooling properly. I posted a request for help on Yelp around 8 PM, and to my surprise, the owner responded in under ten minutes. They sent a technician out the very next morning, replaced the evaporator coil, and the issue was resolved!

I also asked them to inspect the HVAC system at my new townhouse, which the inspector had claimed was in perfect condition. The team discovered a small leak in one of the coils (a detail the inspector missed). It wasn’t a problem at all- they fixed the coil that same day.

They were so professional, friendly, and clearly passionate about their work. A huge thanks to Bay Air Heating & Cooling for overseeing that both properties were taken care of. Highly recommend!

- Daniel A.

We hired Bay Air Heating & Cooling to install a new furnace on our family property in Marin. Israel was responsive, knowledgeable, and did an excellent job. They provide very trustworthy and reliable service. We would definitely use them again for any HVAC needs!

- Ashlee N.

Serving All of Contra Costa County

We proudly serve Walnut Creek, Concord, Pleasant Hill, Danville, San Ramon, Martinez, Antioch, Pittsburg, Lafayette, and beyond.

Book Your Appointment or Call (415) 944-0114 Now!