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.


  • HVAC repair and replacement
  • hot water heater repair and replacement
  • solar PV installation
  • energy audits
  • insulation
  • ductwork cleaning and sealing
  • air sealing


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  • Monday 7:30 AM   -   7:00 PM
  • Tuesday 7:30 AM   -   7:00 PM
  • Wednesday 7:30 AM   -   7:00 PM
  • Thursday 7:30 AM   -   7:00 PM
  • Friday 7:30 AM   -   7:00 PM
  • Saturday 8:00 AM   -   4:00 PM
  • Sunday   -