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(415) 944-0114

Trusted HVAC Services in Marin County, CA

Heating & Cooling Experts Serving San Rafael, Novato, Mill Valley & Surrounding Areas

Looking for reliable heating and air conditioning services in Marin County? Whether you’re in need of AC repair, furnace installation, or air quality upgrades, we’re here to help. Our licensed HVAC technicians bring years of experience and local knowledge to every job. From Belvedere to Fairfax, we’re proud to serve homeowners and businesses with fast, honest, and affordable service.

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Marin County, CA HVAC Services

Heating

Cooling

Water Heaters

Ductwork and Insulation

Indoor Air Quality

Commercial HVAC

Performance + Peace of Mind: Our HVAC Promise to Marin County

Why You’ll Appreciate Working With Us

  • Transparent, Value-Driven Work
    No surprises. We deliver clear, upfront estimates with no hidden fees—from high-efficiency heat pump upgrades to duct optimization projects. You’ll always know what you’re paying for.

  • Tailored Solutions for Marin’s Unique Environment
    Whether you’re in fog-cooled Mill Valley or sun-soaked Novato, our HVAC recommendations are designed for Marin’s varying microclimates. We evaluate your home’s orientation, insulation, and ventilation to customize energy-efficient solutions.

  • Seasonal Tune-Ups That Deliver Year-Round Comfort
    Skip the seasonal stress—bundle your spring AC check and fall heating tune-up for prioritized scheduling and cost savings. Our thorough inspections and performance tweaks help extend equipment life and avoid breakdowns.

Why Homeowners in Marin County Trust Us

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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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.

Why Homeowners in Marin County Trust Us

We’re proud to bring dependable service to every neighborhood we serve—from Novato to Sausalito. Your comfort is our top priority.

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