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The Benefits of Regular HVAC Maintenance for Your Home

Your HVAC system ensures your home stays comfortable throughout the year. Whether combatting the sweltering summer heat or staying warm during cold winter evenings, your heating and cooling system diligently …

Top 6 Ways to Improve Airflow in Your California Home This Winter

Winter is here, and with it comes the need to ensure your home stays warm and comfortable. Maintaining proper airflow is crucial to keeping your home cozy and your heating …

The Power of Humidity Control in California HVAC Systems

When we think about HVAC systems, the first thing that comes to mind is temperature regulation. However, an equally vital yet often underestimated aspect is humidity control. This hidden function …

Give the Gift of Comfort This Holiday Season

The holiday season is upon us, and what better way to show you care than by giving the gift of comfort and peace of mind? With A-1 Guaranteed Heating & …

Top Tips to Get Your HVAC System Winter-Ready in California

Although California winters are relatively mild in comparison to many other areas in the U.S., it’s crucial to prepare your HVAC system to maintain a warm and energy-efficient home. Here …

Heat Pump Water Heaters

Top Fun Facts About Heat Pump Water Heaters in California You might already know that heat pump water heaters are a fantastic way to save energy and money in California. …

Understanding SEER Ratings and Their Impact

Energy efficiency is a key consideration when choosing a new air conditioning system. This efficiency is determined by the Seasonal Energy Efficiency Ratio (SEER). Knowing how SEER ratings work can …

Top 10 Ways to Enhance Indoor Air Quality

The quality of the air inside your home can have a big effect on your health and how you feel. It’s often said that the quality of the air we …

5 Surprising Facts About Heat Pumps

Heat pumps are gaining popularity as a more energy-efficient alternative to conventional heating and cooling systems. However, there’s more to them than you might think. A-1 Guaranteed is the area’s …

Understanding HVAC Filters and Their Importance

Your HVAC system’s filter plays a crucial role in maintaining indoor air quality and the efficiency of your unit. But with so many different types and ratings available, it can …

Fall HVAC Maintenance Checklist

As we move from summer to fall and the daylight hours decrease, it’s the perfect time to get your HVAC system ready for the upcoming colder months. In California, fall …

Heat Pumps, Rebates, and More from A-1 Guaranteed Heating & Air, Inc.

As gas heating systems and appliances are being phased out across the country, heat pumps are emerging as an environmentally friendly alternative for maintaining comfortable temperatures indoors all year long. …

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