Blog

Your Guide to Efficient and Comfortable Home Heating and Cooling

Combat Dreaded Dry Winter Air the Right Way

Every season when the temperature drops, so do the indoor humidity levels. The dry winter season air can play havoc with everyone in the home in many ways and can …

Why Winter is a Great Time for HVAC Service in California

For most of California, especially the southern part of the state, winter doesn’t have the same meaning as it does in many other parts of the country. There are stretches …

5 Tips for Inspecting the HVAC System in a New-to-You Home

Your HVAC system is an important part of the comfort and climate of everyone (and everything) in your home. It’s also one of the biggest investments for your home that …

7 Savvy Holiday HVAC Tips

The holidays are a time during which many homes will see more traffic than during the rest of the year. Believe it or not, the increased number of visitors to …

HVAC and Holiday Safety in the Home

Christmas is just around the corner, which means there are some things you need to do regarding your HVAC system and your home to stay safe through the entire season. …

5 Useful DIY Furnace Maintenance Tips

When taken care of and properly maintained, a new furnace should last for between 15-20 years. However, when units are neglected, their life spans are usually cut considerably short. Once …

Components of Your Furnace You Must Know

There are a lot of people who don’t know anything about the main components of their central heating units, and that’s okay! That’s why we’re here: to take care of …

Your Fall HVAC Checklist for Contra Costa Landlords

Are the furnaces in your rental units ready for cooler weather? Autumn brings with it some welcomed cooler weather to California, which means that it’s once again time to start …

Using Gas vs. Electricity for Your Home

Historically, appliances in the home have relied on natural gas as their main energy source. However, as the costs of natural gas continue to rise, residents of California are seeking …

Top Reasons Why Your Air Conditioner is Dripping

There are more than 100 million homes in the United States that have air conditioning systems, and sometimes, these systems can leak water inside the house and outdoors. It’s not …

MERV and HEPA Filters: What’s the Difference?

If you’re a homeowner or small business owner, you’ve likely heard the acronyms “HEPA” and “MERV” before in discussions about furnaces and HVAC systems. Don’t let the two acronyms cause …

15 Fun Facts About Air Conditioning You Never Knew

When you think of an air conditioner, or heating and cooling in general, “fun” probably isn’t the first word that comes to your mind! And that’s ok, we get it; …

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

Don’t Just Read About Comfort—Experience It.

Contact A-1 Guaranteed today for expert heating and cooling solutions that keep your home comfortable year-round.

866-883-7789

Carrier Factory Authorized Dealer
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
Diamond Certified