The Leader in Napa County Heating and Air Conditioning

Discover why so many Napa County residents rely on our team at A-1 Guaranteed Heating & Air, Inc. for their HVAC needs and more. We’re dedicated to serving Vacaville, Contra Costa, Napa, Solano, and the entire Bay Area with unmatched repair and installation services and have been since 1996. We offer services that include heating, cooling, insulation, window installation, tankless water heaters, and more.

With an outstanding reputation showcased in our 5-star ratings on Google and Yelp, our team has worked hard to earn our reputation as the leader in Napa County HVAC and home comfort services. With several years of Readers Choice Awards from various local newspapers and an “A” rating on Angie’s List during our tenure, we set the bar for excellence in the industry. 

• Expertise in both Commercial and Residential Installation
• Recognized as an Energy Upgrade Participating Contractor
• Factory Trained Installers and Technicians for superior service
• Maintaining a drug-free environment for your safety
• A Diamond Certified Company committed to excellence
• North American Technician Excellence (NATE) certified professionals
• A Bay Area Certified Green Business dedicated to sustainable practices
• Rigorous background checks for all employees, ensuring your security
• Your satisfaction is always guaranteed, and we are fully licensed, bonded, and insured

A-1 Guaranteed Heating & Air, Inc. is locally owned and operated, and we take great pride in offering comprehensive heating and air conditioning solutions that improve the safety, energy efficiency, and comfort of our customers’ homes and businesses.

We specialize in a wide array of services to keep your home or business safe, comfortable, and energy-efficient, including:

Heating and Air Conditioning: Our skilled technicians are equipped to handle all your heating and cooling needs, ensuring consistent indoor comfort and climate control throughout the year.

Tankless Water Heaters: Upgrade to an energy-efficient, space-saving tankless water heater that provides continuous hot water and meets the specific demands of your household.

Windows: Enhance your home’s aesthetics and energy efficiency with our premium window installations, designed to maximize natural light while optimizing insulation.

Insulation: Our top-tier insulation services enhance the energy efficiency of your property, maintaining a comfortable environment and reducing long-term energy costs.

Duct Replacement: Rely on our expertise to replace and maintain your ductwork, ensuring optimal air quality and distribution throughout your home and enhancing the efficiency of your HVAC system.

Our team has been voted the best heating and cooling company for 16 years, and we’re a BPI-Goldstar Certified company, too. We’ve been awarded “Best of the Bay” for 5 years by KRON 4 TV and a proud member of the Better Business Bureau Honor Roll for 24 years.

We also proudly offer complimentary estimates with no obligation on new equipment. To make an appointment with us or for answers to any of your questions, contact us at A-1 Guaranteed Heating & Air, Inc. today at 888.421.2473.