A-1 Guaranteed Heating & Air Inc. is a California Green Business Network-certified business offering solar services to homeowners in and around Vallejo. The local company installs solar power systems, including solar batteries, helping residents and businesses achieve energy independence. The family-owned and family-operated business is an Energy Upgrade California participating contractor. It also installs heating, cooling, and insulation systems. A-1 Guaranteed was established in 1996, and it is a member of the Electric & Gas Industries Association.
California Electrical Contractors State Licensing Board