A-1 Guaranteed Heating & Air Conditioning

Vallejo, CA

Heating and Cooling

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Since A-1 Guaranteed began as a business, we have grown to be one of the most trusted HVAC service businesses in the areas of Solano, Napa, and Contra Costa Counties. In addition to Heating & Air, we now provide many other services including:  Solar, Tank-less Water Heaters, Windows, Insulation, Duct Sealing, Energy Products, and Home Performance.  CA License # 719381 Established in 1996. The owners began the business in their garage and have recently celebrated the 20th year anniversary. A-1 Guaranteed now operates with more than 20 employees in a beautiful, newer building. We built our business by providing the very best customer service in the Bay Area.  Over the years, we have received multiple awards for our customer service.

Services Offered

Heating and Cooling
  • Central A/C Install
  • Central A/C Repair
  • Central Humidifier Install
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