Patty Greiner founded Greiner Heating and Air Conditioning on their core principles of honesty, care and patriotism. Greiner is not just another contractor in the area – we are fully involved in the community. Our deep commitment to the region and its people extends to Davis, Winters, Fairfield, Vacaville, Dixon and Woodland. In every office and truck you'll find the same kind of well-mannered team members who use an in-depth, relationship-building approach to home performance services.

What you get with Greiner:

BBB award for Greiner Heating and Air Conditioning being a member for over 10 years!

  • 100% focus on residential work
  • Complete honesty in all phases of the job
  • The region's best HVAC and solar installations
  • Efficiency with your investment
  • Happy employees and technicians who make your life easy

We're here to help with all your home performance needs.

Our capabilities include:

We want to work with you!

We've never met a system we can't improve.

Contact us today to learn more about our services

Schedule Service

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For only $1, we’ll upgrade whichever furnace you decide on to the next highest level of efficiency!
Receive Up to $1,600 or Up to 72 Months No Interest Financing on Qualifying Equipment

Take it from our customers!

Readers of The Reporter Newspaper & Daily Republic Voted us the "Best Heating and Air Contractor" and "Best Solar Contractor"


Greiner is one of the top HVAC contractors in the area, as voted by readers of the Solano County Reporter