heating & air conditioning services
Diamond Certified

Sales Service Installation

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(707) 645-0734Vallejo

(925) 609-8800Contra Costa

Serving Solano, Napa and Contra Costa Counties
CA License # 719381

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Better Business Bureau Honor Roll Member for 20 Years Running
Awarded Spirit of Solano 2012
BPI Certified
Energy Upgrade Participating Contractor
Trane Award for Superior Installation and Service
Vallejo Times Herald Best of Solano County for Best Heating/Cooling Company for 10 years
Vallejo Schools V.I.P. Award for Partners in Education
Vallejo Little League for Support and Generosity
Bay Area Certified Green Business
Best of the Bay for 4 years
Chambers of Commerce: State of California, City of Vallejo, and City of American Canyon
League of California Homeowners
Electric & Gas Industries Association
Air Conditioning Contractors of America
Napa-Solano Builders Exchange
Better Business Bureau
Safety Services Company
Trane Comfort Specialist
NATE Certified
EGIA Approved Contractor
Diamond Certified

A-1 Guaranteed Heating & Air Conditioning
1768 Broadway St. Vallejo, CA 94589

Richard Hiteshew
Energy Upgrade California
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. We have gained experience and knowledge from putting our name on thousands of installations and repairs, and our customers gain from our working knowledge of the latest technology in heating and air conditioning.

Our reason for existing is the basis of our company philosophy: We work to provide service to our customers. Looking after the best interests of our customers in a professional and fair manner is what sets us apart from other businesses in the industry. We pledge to always be courteous, fair, thorough, and professional in every service we provide.

It is this pledge that has enabled us to grow as a family and expand as a company over the years. We are licensed by the state of California (License No. 719381) and hold that license as a true privilege and a testament to our reputation as a premier provider of indoor comfort.