Business Details
30 Years
experience
Expert HVAC Services in Vallejo, CA
A-1 Guaranteed is a family-owned HVAC company serving the Bay Area, Solano, Napa, and Contra Costa Counties since 1996. Founded by Richard and Krissy Hiteshew in their Vallejo garage, we have grown into a trusted name in heating and air conditioning while maintaining our family values. Our team specializes in energy-efficient heat pumps, home electrification, and HVAC installations that align with Californias clean energy goals, helping customers reduce energy costs and carbon footprints. We are a participating contractor in statewide heat pump rebate programs, offering exclusive savings.With nearly 30 years of experience, we pride ourselves on factory-trained technicians, rigorous employee background checks, and a 100% satisfaction guarantee. Recognized as Diamond-Certified and a four-time Angies List Super Service Award winner, we combine technical expertise with personalized service. Our commitment to transparency, ethical practices, and community involvement has earned us a loyal customer base, with many clients relying on us for decades. We operate a drug-free workplace and prioritize ongoing training to stay at the forefront of HVAC innovation.
Services
Heat Pumps
Water Heaters
Home Electrification
Furnaces
Air Conditioning
Tankless Water Heaters
Electrification
Indoor Air Quality
Insulation Services
AC Services
Details
- Year established: 1996
Highlights and features
- Family-Owned & Operated Since 1996
- Heat Pump & Home Electrification Experts
- Participating Contractor with Rebate Programs
- Factory Trained Installers & Service Technicians
- All Employees Fully Background Checked
Associations and certifications
- Diamond Certified
- Better Business Bureau
- North American Technician Excellence (NATE)
What people say
Prompt service
Professional staff
Competitive pricing
Excellent workmanship
100% satisfaction guarantee
Services
Heat Pumps
Heat pumps provide energy-efficient heating and cooling by transferring heat between your home and the environment. Ideal for Californias climate, they reduce energy bills and carbon footprints while offering reliable year-round comfort. Our installations ensure optimal performance and compliance with clean energy standards.
Heat Pump Water Heaters
Heat pump water heaters use advanced technology to heat water efficiently, cutting energy costs by up to 60%. We install systems that integrate seamlessly with existing plumbing, ensuring durability and compliance with state energy codes while maximizing savings.
Home Electrification
Home electrification replaces gas appliances with high-efficiency electric alternatives, reducing emissions and utility bills. Our experts guide homeowners through the transition, leveraging rebates and incentives to make sustainable upgrades affordable and impactful.
Air Conditioning
Our AC services include installation, maintenance, and repair of systems tailored to Bay Area climates. We prioritize energy-efficient models that deliver consistent cooling, improved air quality, and quiet operation, backed by a 100% satisfaction guarantee.
Insulation Services
Proper insulation enhances HVAC efficiency, lowering energy consumption and costs. We assess and install high-quality insulation solutions for attics, walls, and ducts, ensuring homes remain comfortable and energy-compliant year-round.
Questions
What HVAC services does A-1 Guaranteed offer?
We specialize in heat pumps, air conditioning, furnaces, heat pump water heaters, home electrification, and insulation services, all tailored to California’s energy standards.
Do you serve areas outside the Bay Area?
Our primary service areas include Solano, Napa, and Contra Costa Counties. Contact us to confirm availability for your location.
Are financing options available for HVAC installations?
Currently, we do not offer direct financing, but we help customers access state and local rebate programs to offset costs.
What certifications does A-1 Guaranteed hold?
We are Diamond Certified, NATE-certified, Better Business Bureau-accredited, and maintain a drug-free workplace with fully background-checked employees.
Do you provide emergency HVAC repairs?
We prioritize scheduled service appointments but strive to accommodate urgent needs promptly during business hours.
What guarantees do you offer?
We stand behind our work with a 100% satisfaction guarantee—if you’re not satisfied within the first year, we’ll refund or replace the system.
Videos
Reviews (5)
Noel S.
Jan 12, 2022
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Today we had our maintenance done on our furnace. Brian came within the time frame I was given for the appointment. Great service and he was informative going over the details and recommendations.
Yvette A.
Dec 28, 2021
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Just to mention that Matt came back shortly after the installation to repair the damage to the heat pump exterior and fix another small problem. We felt completely confident that he stands behind his work and that we can count on him 100%. Highly recommended!
Annette T.
Dec 16, 2021
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We have been using A-1 Guaranteed Heating and air now for quite some time. They actually installed our heating/air conditioning unit about 10 years ago and we have a contract with them. They have always been very considerate and timely. I have dogs that I need to lock up when they come so the technician always calls ahead. When we need service they have always gotten to us very quickly. I definitely recommend them.
Noel Bernardo
Dec 07, 2021
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I had scheduled a tune up of our furnace on Nov. 19 and the technician was suppose to arrive between 11 and 1. At a little before 11, I receive a call from Brian and he says he will be doing the service and that he is 10 minutes out. Promptly at 11 he arrives, which I truly appreciate as no one likes waiting. I'll keep it short, but Brian did a thorough inspection of the unit, found what issues were there and then went over them in detail with me regarding the unit. What I liked is that he didn't try to sell me anything, but told me what to be aware of and, in the future, they can repair/replace
Andrea R.
Nov 24, 2021
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I have been using A-1 for several years now and have been very happy with their service. I'm on their Kasey club plan for my heater maintenance. I recently replaced all my heater air ducts that were failing and the entire process was flawless from the initial inspection by Kirk who is so knowledgeable, friendly and quickly responsive to later questions all the way to completion. Kenya in the office called with the schedule which consisted of 4 separate appointments and emailed as well. The abatement team arrived on schedule but a few hours earlier than planned which was fine since we were
