Ed C.
11/6/2025
So it's that time of year again. Inspection and tune up on the furnace Jake my technician was on time spent an hour on the unit and then took the time to explain all he did. Written report was...
A-1 Guaranteed
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1768 Broadway St
Vallejo, CA 94589
A-1 Guaranteed is a family-owned and operated business that serves HVAC and Solar Services Serving All Of Solano, Napa and Contra Costa Counties, Fairfield, Vacaville, and the Bay Area with Heating and Air Conditioning, Solar, Tankless Water Heaters, Windows, Insulation and/ or Duct Replacement needs. As one of the premier service businesses in the area, we have helped thousands of satisfied, loyal customers improve the energy efficiency of their homes and offices.
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Reviews
4.5393 reviewsNguyen
8/15/2025
We are pleased with A-1 Heating & Air Company with its excellent service in replacing our old leaking water heater. Office staff was friendly, professional and courteous. Nick even came to our...
Christine W.
10/6/2025
From beginning to completion, we have been immensely satisfied with A-1. Kirk visited our home a couple of times, spending the considerable time needed to do a close examination of our house and...
Robert S.
7/31/2025
Leaving another 5 star review for A-1 Guaranteed. A-1 sold and installed new HVAC and PV Solar systems for us in 2017. The sales and installation experience were both excellent. Every detail was...
Rafa C.
5/6/2025
Great job A-1 Guaranteed Heating & Cooling! Kudos to project lead Matt H, and installers Jose and Edgar for quality and excellent work on my new Bryant replacement air-conditioning unit. I will...
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