Services Furnace Installation & Repair

We had a behemoth of a heater from the 1950s and the thought of replacing felt like the biggest chore. Contra Costa came in and gave us a cleaner and more efficient system within a few hours. They got rid of the old beast and cleaned up behind themselves. Extremely professional, hard working and friendly crew. Special shout-out to Tony K who helped us out a ton. They also had great pricing options. I’ll choose them every time!! Thank you.

Peter came on-site for initial diagnosis and subsequently for repair of A/C. He was very knowledgable, on time, and efficient in his work.

Had such a positive experience with the installation of my new Lennox heating and air conditioning systems. It started off with the lead introducing himself, Danny, and his co-workers, Fausto and Abdul. They were all extremely professional and respectful of my property and cleaned up daily when they left the job. They are also very hard workers, never taking breaks except for lunch. Danny was extremely knowledgeable on the products and very patient in explaining the workings to me. I would not hesitate to recommend Contra Costa Heating and Air Conditioning to any of my neighbors facing the prospect of replacing their systems too. Kudos to Danny for making this experience so easy and positive! Thank you.

Contra Costa H&AC came by today and it was a great experience. They were slightly late for the scheduled appointment, but immediately let me know when they knew they were going to be arriving with an accurate estimate. They were super knowledgeable and upfront providing everything I asked for (refrigerant adding + sealant) after doing their thorough testing. While our AC unit is definitely dated, I was very grateful they didn't try to force an upgrade on us. Thanks Tony & team!

The new thermostat installation was quick and perfectly calibrated.

Claudio was amazing, in educating us, explaining the best way to use our heating/AC minisplit system. He fixed everything and we're very pleased with his service.

Just had Heating and AC system installed. Great work, clean, punctual. System works great. Thank you CC HVAC.

Contra Costa Heating and Air Conditioning did an excellent job repairing our heater during winter. They arrived on time, explained the issue clearly, and left the work area very clean. Highly professional company.

Reliable, professional, and clean. They arrived on time and completed the work efficiently. We will definitely use them again.

Our furnace stopped working during a cold week and CCHA responded quickly. They fixed the issue the same day and left no mess behind.

The system upgrade improved our home's comfort immediately.

recycling old air conditioning heating system and find out they moved love to find where they moved I like say they are a great company and good people are to be missed Billy carthen of Oakland ca.thank s you for the scarp mentel

I recommend Contra Costa heating & AC, I called and made an appointment and they came out the next day to inspect the problem and fixed it the same day great customer Service, I will keep using them to services our Heater and AC.

Very impressed with how organized and efficient the crew was. They respected our home and completed the job without any issues.

The technician arrived on time and fixed our heating issue the same day.

Great service, very professional.

The installation was clean, professional, and done with minimal disruption.

Pricing is only one part of the great experience with Contra Costa Heating & A/C. Especially in these days of Covid-the care, attention, professionalism of the entire team in my home was excellent!

Excellent installation of our new air conditioning system. Everything works perfectly.

Their attention to detail really stood out, the new system runs smoothly and quietly.

I am 100% satisfied.

Took care of my AC and heating needs annually and when it broke they came and fixed it asap. And the tech and owner seem to be very professional and I recommend there services !!! The price and quality is worth it

We had an air conditioning installation today by Contra Costa Heating and Air Conditioning and the experience was fantastic! They sent two crews and got the entire installation and system check completed in just six hours. Every part of our experience from site visit, estimate and installation was professional, touch less, and current covid-19 aware. Awesome Job, we should have done this 10 years ago.

Very knowledgeable team that explained the system and maintenance clearly.

Two thumbs up to Peter and the team at Contra Costa HVAC! They found my issue and fixed it the same day! I really appreciate their attention to detail, when Peter came to my home, he had his protective gear on and was ready to work. This is a team I can trust and rely on, I will be calling on you again!

Great winter service experience. They inspected our heating system, made a small repair, and ensured everything was safe before leaving. They did the 18 point safety check. Used a carbon monoxide and gas leak machine.

We had our furnace serviced and everything went smoothly. The technician was punctual, courteous, and respectful of our home. It’s hard to find companies this reliable anymore.

They answered all my questions and walked me through how the system works.

Manny and his crew were amazing. We bought our house August of 2021. The 4th time we turned on our heat, it blew carbon monoxide all throughout our house. The people who we bought the house from and the owners before them who renovated the house, lied to us and the heating never worked and could have killed us. We called in Manny and his crew for this serious situation and they are the most knowledgeable at their trade. They were able to figure out exactly what the original installers did wrong, and what the previous owners guys did wrong trying to bandaid the problem. You can trust Contra Costa 100%. They are the right team for any problems you’re facing with heating and air systems. I now have a new system that works perfectly and I am so grateful to them.

It all started with Tommy Rojas the sales person. He is very pleasant to work with and not 'pushy' at all. He listened and offered cost-effective plans that included quality equipment that fit our budget. After we agreed on type of equipment Tommy arranged the rest of the work flow from arranging for the duct removal (asbestos) to installing the new ducts and equipment. Next was Alex and his team who did the actual work of installing the ducts and equipment. Alex and his crew were very respectful and made sure to keep clean our flooring as they proceeded to remove the old equipment and install the new HVAC. They went beyond expectations because they did small repairs not necessary to the HVAC replacement, they cared about fixing small things such as the door to the HVAC closet and provided extra air filters. Once HVAC installation was completed and functionally tested, Alex made sure to explain the operation of the new thermostat, equipment and answered all our questions. We are extremely pleased and highly recommend the services of Contra Costa Heating & Air Conditioning. Big thumbs up to Tommy, Alex and his team!!

Had a Lennox furnace installed 2 years ago and decided to add AC this year. Installation was done in 2 days and crew was very professional. We ran into a problem though since the AC water pump wasn't turned on properly so there was quite a bit of water damage to the 1st floor ceiling. I called and the next day the office arranged for someone to come out and take a look. Another crew was dispatched to inspect everything and fix the damaged drywall. Wasn't exactly the smooth experience I wanted but nevertheless I'm impressed that the company spared no expense in fixing the flaw and ensuring that we were happy with the results. I think how a company acts when things aren't perfect tells you a lot more than when the install is clean. Definitely would recommend these guys.

We recently purchased a 4,000 sq ft home in Novato,CA. Both the gas heating and air conditioning systems needed to be replaced and large sections of duct work needed to be replaced as well. We engaged Contra Costa HVAC to install (2) Lennox Elite EL296V gas furnaces and (2) Lennox 16 SEER Condensers. The installation team consisted of three very hard working, knowledgeable and highly skilled field service technicians. Alex was our team lead. Over a three day period, they disassembled and removed the old units and installed and tested the new systems. The quality of the workmanship really shows in the welds, alignments, configuration and aesthetic appearance of the wrapped and insulated units. We were pleased with the consideration given in adjusting air-flow to provide comfortable heat and cooling throughout the house. We would recommend the services of Contra Costa HVAC to others without reservations.

Had a really good experience with Contra Costa Heating & Air Conditioning. We went through their Costco partnership and had a new HVAC system installed in late Oct / Nov 2025. The install was smooth end to end, and the crew was professional, punctual, and easy to work with. They also removed an old thermostat and patched the drywall. The first patch wasn’t great, but I called them back and they sent someone out who fixed it properly. The wall looks good as new now. After the install, I noticed some uneven temperatures between zones. They came out, checked everything, and confirmed the thermostats were reading accurately. They even offered to replace them. I ended up resolving it myself by adjusting the system’s circulation settings, which improved airflow and evened things out. On pricing, their initial quote came in higher than a few other vendors. That’s mainly because they use higher quality equipment and components. When I asked other vendors to match the same setup, the pricing ended up pretty close anyway. Contra Costa also offers strong guarantees on workmanship and parts, which gave me more confidence going with them. If you’re just trying to get the cheapest install possible, they’re probably not the right fit. But if you care about doing it right and getting a solid system that will hold up over time, they’re a great choice. Overall, very happy with how everything turned out. The system is working well, and they were responsive whenever I needed follow-up.

If you’re looking for reliable HVAC service, this is the place to go, five stars from me.

Honest recommendations and no pressure sales approach.

We recently had a new Lennox furnace and air conditioner installed. Despite some challenging issues relating to the layout of our home, where access to power and the furnace are not easy, they were able to overcome each challenge one by one. We now have a well functioning system that works and looks terrific and much better than we expected. They have a hard working crew tolerant of endless questions, and very creative problem solvers. They came to the house on time, finished on time and on budget. Thanks to Julie for helping with financial stuff, Gilbert for super workmanship, and Tommy for his patience and design. We can recommend this company highly. David and Joyce Goldschmid

Professional ductwork repair with noticeable airflow improvement.

Katie on the phone was very helpful with scheduling and Claudio who came out to the house was GREAT. He explained all the thing he did and why we had issues and resolved them on the spot! Fully tested out the system before leaving

The techs are very professional in a way that they explain the condition of the unit, what’s the cause of it and how they deal with it. After the inspection they will tell you the area(s) that need any further attention. The whole time they are very friendly and patience.

Contra Costa Heating and Air Conditioning serviced our furnace and replaced our thermostat in one visit. Everything was done efficiently and on schedule. Highly recommend.

Contra Costa Heating and Air Conditioning is a company you can trust. They were professional, punctual, and did exactly what they promised.

Excellent customer service and workmanship. They showed up as scheduled and left our home neat and clean.

I got a consultation from Raji, he is very knowledgeable, professional and friendly

Contra Costa Heating and Air Conditioning replaced our old thermostat and checked our furnace. Everything works great and the technician took time to answer our questions.

Our furnace repair was handled quickly and professionally. The technician was polite and left the work area cleaner than when he arrived. The price was less then getting a diagnosis on my car. Only $425

Clear estimates and transparent pricing before starting the work.

Our furnace replacement was handled smoothly from start to finish.

Our heating system was serviced and tuned up for winter. The technician was friendly, knowledgeable, and thorough

Tony estimator and Alex crew chief were great. Kudos to the crew as well ,Had full installation of a new hvac system with heat pump and ac system. Took them 5 days. Installation from start to finish went smooth. Everything working great!!Thank you team. Definitely recommend!

Raji was very professional and informative. He took the time to actually explain HVAC system.

I had a great experience with Contra Costa Heating & AC. I was referred to them from Costco and they went above and beyond each step of the way. Tony came over to my house for an initial inspection and was very professional. I applaud the team at Contra Costa heating & AC!

Great service. They cleaned my unit very well

Raji one of their Heating Consultants came by our house today to provide an estimate for Installing a Heatpump. He was extremely prepared, had researched the house upfront with rough understanding of what we already had in place before showing up. He reviewed our existing Gas Furnace, its age, our electrical and desired location for a potential new install. Unlike other sales folks I who have visited, he had a balanced view, not aggressively trying to sell us the most expensive option they could offer, he provided multiple options, listed the pros and cons, offering a pragmatic view towards which accounted for our existing infrastructure and budget. A helpful neighbor with your best in mind. Looking forward to work more with him and his team!

Great value for the money, I feel confident in the work they did.

I highly recommend this company to anyone needing HVAC service.

Excellent service from start to finish, very attentive and professional crew.

Professional HVAC service with quick diagnosis and efficient repair.

The location was easy to find and the team arrived exactly when promised.

I really appreciated how clean and respectful the technicians were. They wore shoe covers, cleaned up completely, and explained everything clearly. Great company.

We had a new furnace installed and the entire process was smooth. The crew was respectful, efficient, and cleaned up thoroughly after the job.

I really appreciated how clean and respectful the technicians were. They wore shoe covers, cleaned up completely, and explained everything clearly. Great company.

Had an air conditioning unit installed and the service from the time we called to the finished installation was exceptional! Highly recommend Contra Costa Heating & Air Conditioning.

Reliable service you can count on for heating and cooling repairs.

Reliable service with fair pricing and quality workmanship.

We had our furnace serviced and everything went smoothly. The technician was punctual, courteous, and respectful of our home. It’s hard to find companies this reliable anymore.

We had heating maintenance done before winter and it was a great experience. The technician was thorough and professional, and the system runs quietly now.

Their crew worked respectfully and kept the workspace tidy the entire time.

Raji came to provide information and costs for a replacement for an existing furnace, which is nearing 20 years old. He is very knowledgeable and professional. After checking what I currently have, we reviewed options and costs. I am very satisfied and looking forward to the installation,

Fair pricing, no hidden surprises, very transparent.

Thank you so very much for the proactive, punctual, very effective, and professional service call today. The crew was friendly, informed, and thoroughly inspected my furnace and A/C installation. Contra Costa Heating is a terrific group to have as a home care resource.

Great guys.

Gilbert, Guillermo, and Leo did a great job helping out. Job came out perfect and I highly recommend this company. Good quality work!

The crew did an excellent job replacing the furnace and adding AC. They were on time, clean, friendly and very capable. The job was completed in two days with minimal disruption to our daily routine.

The office staff followed up promptly and made sure I was satisfied afterwards.

The technicians arrived on time and worked efficiently, leaving everything spotless.

They did a great job and installation was flawless. Time frame was much quicker than expected.

Great experience from start to finish. Scheduling was easy, they showed up when promised, and our heating system has been running perfectly since. Very clean and professional work.

Manny and Fausto did an amazing job replacing a new heater and ac unit at my house. They were extremely polite and professional. They explained me everything they were doing. When done Manny explained the whole unit all the bells and whistles. Showed me how to operate the new touch screen thermostat. In all I'm extremely satisfied with the work and the professionalism that Manny and Fausto did on our unit. They were very mindful on how they worked in our home as if they were working on their own home or a family members home. I will definitely be recommending these great guys. Thank you for the great service fellas it is much appreciated.

Quick turnaround and excellent troubleshooting skills.

I am so thankful for everything Contra Costa Heating and Air did to help replace our heater and install central air in our house. Since we have an HOA, the process has been a little harder trying to get everything done exactly how the HOA wants things. However, since the beginning meeting with Tommy to talk through the details, we knew we were in good hands! Everyone from the company was extremely professional, polite, and helpful throughout the entire process. Even when I called the office they sounded generally happy to hear from me, which was so nice and made me feel valued. I would absolutely recommend this company for your air conditioning and heating needs! So professional, quick, great work, and everyone was so nice!!! 10/10!

Gilbert and his team were great. They came on time, did a professional job, cleaned up afterwards and were ahead of schedule. They were knowledgeable and answered any questions I had. Would definitely recommended. Thai

Contra Costa Heating and Air Conditioning did an excellent job repairing our heater during winter. They arrived on time, explained the issue clearly, and left the work area very clean. Highly professional company.

Exceptional in every way!

Competitive pricing and high quality installation work.

From the first phone call to the completed job, the service was outstanding. They arrived on time and treated our home with care.

We recently installed a new furnace and couldn’t be happier. The crew was on time, organized, and took extra care to protect our floors. Excellent service.

I received the result I hoped for, efficient heating and cooling, done right.