Connolly Heating and Air Conditioning.

Your California
Air Care Specialists


Is your Furnace acting up, blowing cold air, or making too much noise? Don’t get left in the cold! Our experienced team of professionals is here to keep your home or business warm and cozy.


Connolly Heating and Air Conditioning is the leading company for all of your air conditioning and cooling needs. Our technicians are qualified professionals who will get the job done right for your home or business.


Regular Heating and Air Conditioning maintenance not only increases the reliability and efficiency of your equipment, it also extends its lifetime. Protect your investment with a maintenance agreement.


Did you know, indoor air can be two to five times more polluted than outside air? Breathe easy, knowing you have a trusted partner in Connolly Heating and Air Conditioning.


Designed to help you lower your home’s overall energy consumption as well as its effect on the environment, solar energy systems utilize the energy of the sun and convert it to lower electricity usage for you.

Industry-Leading HVAC Experts

ESTABLISHED IN 1992, Connolly Heating and Air Conditioning is an air care specialist that serves communities in Contra Costa County with superior heating and air conditioning services and products. Our team’s goal is to provide outstanding professionalism, premier solutions, and long-lasting results for residential and commercial customers. At Connolly Heating and Air Conditioning, we strive for 100 percent satisfaction in everything we do. Choose Connolly as your trusted HVAC provider!

Connolly service truck.

Our Latest Reviews

“Positive: Professionalism, Punctuality, Quality, Responsiveness, Value. From the first call, I was greeted professionally by Bonnie. She was very supportive. She referred me to Nick who helped me troubleshoot and gave me a reasonable quote. The next day, technician Russ showed and repaired my A/C within 30 minutes. A/C is working great. I highly recommend Connolly HVAC.”
- Rosalind B.

“A year ago, I had a great experience with Brian and his team from Connolly Heating and Air Conditioning. In our initial meeting Brian offered excellent advice and options for my home. I chose them to replace my 70+ year old furnace and install air conditioning based on Brian’s thorough consultation, fair price and their excellent reviews. I wasn’t disappointed. They arrived when they said they would and finished the job on time. I am very happy with my new system and would recommend them to anyone. Services: Installation, HVAC duct & vent repair, Heating system installation, Install thermostat, Install AC”

- Terra I.

We love hearing from our customers! If you've had us work on your HVAC system, we would love to hear from you too.

Leading our industry in air care comfort

We Have Financing Options Available!

We Service All Makes and Brands!

We’re a Carrier Factory Authorized Dealer

Carrier Authorized Dealers work hard for this designation. And all their experience and work is for one purpose—to create comfortable homes and satisfied customers. So when you need a new system, or it’s time to service or repair your current equipment, you can trust you’re working with the best in the business.

Carrier HVAC unit.

The Connolly Blog

How Can I Lower My Heating Bill This Winter? A winter blizzard rages outside the back yard bay window where this small, serene potted plant garden grows and blooms oblivious to the season.

How Can I Lower My Heating Bill This Winter?

By Connolly Heating & Air | November 30, 2023

Are you anticipating a higher heating bill this winter? Here in Martinez, temperatures can get pretty low. The only way to ensure you remain perfectly comfortable inside your California home is by cranking up the heat.

Why Is My Heat Pump Turning On and Off Frequently? - Professional Standing Next to Heat Pump Unit Outside.

Why Is My Heat Pump Turning On and Off Frequently?

By Connolly Heating & Air | November 26, 2023

Homeowners generally favor heat pumps for their efficiency. However, a number of common issues can cause them to run very inefficiently.

How to Determine Heat Pump Efficiency. Couple sitting on the floor drinking out of mugs and eating breakfast.

How to Determine Heat Pump Efficiency

By Connolly Heating & Air | November 15, 2023

If you are in the market for a new heat pump, efficiency is probably a key factor in your search. The Air Conditioning, Heating, and Refrigeration Institute (AHRI) has a universal ranking system for heating and cooling units that serves to help. 

Awards and Certifications

Carrier President's Award 2022.
Carrier President's Award 2021.

Our Maintenance Plans

Peace of mind with year-round protection!

What are you waiting for?

Contact us today!