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Does It Make Sense Getting HVAC Annual Maintenance?

The Importance of Annual HVAC Maintenance Many people often question whether it is really necessary to have their HVAC units serviced annually. Plenty of people go years without annual maintenance …

The New Energy Law and Why Electric Heating Systems are the Future

Switching to Electric Heating Systems Signed into law in 2018, California’s SB100 makes giant leaps towards using energy that is 100% renewable.  This means that gradually over the next few …

Maximize Energy Efficiency with Load Calculations, Insulation, and Airflow

The Keys to Efficient Energy in the Contra Costa Area Energy efficiency is a heavy buzzword lately when it comes to matters of the home – and for good reason. …

4 Ways to Synch Up Your Home HVAC System to Smart Devices

After a decade of the smartphone, you can now add the new element of smart houses to your modern lifestyle. If you’re lucky enough to have both, then you can …

Stay Ahead Of The Change With A-1 Guaranteed

Undoubtedly, one of the most important resources we consume as humans is energy. So many things depend on it to power equipment, heat our homes, and keep the world running. …

Heat Pump Water Heaters: How They Work and Help You Save Money

The Benefits of Heat Pump Water Heaters What Is a Heat Pump Water Heater? Known in the trade as hybrid electric hot water.  Heat pump water heaters use electricity to …

How to Get Rid of That Stubborn Musty Smell in Your Home

Removing Mold and Must from Your Home If you’ve noticed a musty smell in your home, spending time indoors might not sound too appealing. A musty smell is usually a …

5 Tips to Reduce Heating Costs this (and next) Winter

With the winter season in full swing, you may find your thoughts wandering to your furnace, then to your house and its heating efficiency. How effectively is your home being …

How To Winterize Your Home 2

If you’ve been putting off winterizing your home because you weren’t sure exactly how to do it, it’s time to stop procrastinating! It’s not as hard as you might think …

Common Furnace Problems and What to Do About Them

Not Sure What’s Wrong with Your Furnace? Read This First We hardly notice our furnace when it’s working properly, but when something goes wrong, it can feel like the sky …

Damaged Heat Exchangers and the Dangers of Carbon Monoxide

How Cracked Heat Exchangers Can Lead to Carbon Monoxide Poisoning Every year, many families put themselves at risk of carbon monoxide poisoning due to damaged and cracked heat exchangers in …

How Insulation Keeps Your Home Cool and Warm

If you are fortunate enough to live in a climate where there is a large variety of temperatures throughout the year, then you already know that it is a challenge …

Why Choose

A-1 Guaranteed?

Family-Owned & Operated

Highly Experienced with Nearly 30 Years in Business

Heat Pump & Home Electrification Experts

Participating Contractor with Rebate & Incentive Programs

Factory Trained Installers & Service Technicians

Drug-Free Environment Maintained & Enforced

All Employees Fully Background Checked 

Voted Best Heating & Cooling Company for 19 Years

Voted Best of the Bay by KRON 4 TV for 5 Years 

Diamond-Certified Company 

Four-Time Angie’s List Super Service Award Winner

Better Business Bureau Honor Roll for 27 Years 

Certified Green Business

North American Technician Excellent (NATE) Certified

Solano County’s Best of 2024
Golden State Rebates
GoGreen Financing
18 Years Diamond Certified
HEEHRA Rebate
Comfortably California
Hero Registered Contractor
TECH Clean California
Kasey’s Klub
SMUD Participating Contractor
2022 Daily Republic Reader’s Choice
2018 Angie’s List Super Service
2024 Nextdoor Neighborhood Favorite
Solano County’s Best of 2018
Energy Upgrade California
BPI GoldStar Contractor
Bay Area Green Business
BBB Accredited Business
EGIA Approved Contractor
KRON 4 Best of the Bay
NATE
Bryant Factory Authorized Dealer
Diamond Certified