Get matched with top thermostat installers and replacers in Concord, CA

"Replaced 38 year old gas furnace, duct work and installed new smart thermostat. Anthony was very helpful and explained everything clearly. The 3 technicians did the work in 8 hours and cleaned up everything carefully. Anthony also cleaned my insert fireplace pilot light and helped me start the pilot light as a bonus! Highly recommend Perfect Star."

"Peter evaluated the drainage problem with the old furnace system and suggested a cost effective solution. We decided to install a new furnace unit rather than simply correct the problem. Work was done on schedule."

"Josh did a great job on my roofing repair! He showed up when he said he would, and the roof looks great! He also installed some replacement skylights and siding. He sent many pics of the job as I wasn’t able to be there when the work was performed. I will definitely use him again."

We take great pride in our experience, expertise, quality and customer service that we provide to meet the consumers? needs. It is our mission to provide excellent workmanship and complete customer satisfaction from start to completion of a project. In order to understand the needs and expectations of our customers, we take great care to work and communicate with every customer in a professional manner. Our reputation is based on service, safety and quality, regardless of how large or small the job.

"Edgar is very detailed, respectful, professional with very good customer service! He showed up on time and completed the electric panel change sooner than expected! I have already referred him to my cross the street neighbor, Diane. Hopefully she will reach out soon for an estimate to change out her electrical panel too. Thank you ð ð"

Since 1999, Hassler Heating and Air Conditioning has helped East Bay homeowners stay comfortable with energy-efficient heating and cooling solutions built to last. We specialize in full system replacements, heat pumps, ductless mini-splits, and high-performance home upgrades designed to lower energy costs and improve year-round comfort.\n\nHomeowners choose Hassler for honest recommendations, expert system design, and clean, professional installations. Whether you need a fast repair or a complete system upgrade, our team focuses on long-term solutions—not quick fixes.\n\nServing Alameda, Contra Costa, and Marin counties, we’re committed to doing the job right the first time, with quality workmanship you can trust.\n\nCall today for expert service and a smarter, more efficient home.

R Maintenance\n\nAbout Us At R Maintenance , we pride ourselves on delivering top-notch home repair and maintenance services.\n\nOur Services\n\nPlumbing\nElectrical Work\nCarpentry\nPainting\nGeneral Repairs\nWhy Choose Us?\n\nExperienced and Skilled: Our team has the expertise to tackle any job, big or small.\nReliable and Trustworthy: We show up on time and complete the job to your satisfaction.\nAffordable Pricing: We offer competitive rates and free estimates.\nCustomer Satisfaction: Our work is guaranteed, and we have numerous positive reviews from happy clients.\nContact Us\n\nPhone: (925) 956-3017\nEmail: aaronrivassr@rivasmaintenance.com\nWebsite: www.rivasmaintenance.com

At TRIO Heating, Air & Plumbing, our mission is clear: to provide top-tier heating and air conditioning services while focusing on exceptional customer experiences, employee happiness, and environmental responsibility. We are dedicated to delivering outstanding service that ensures our customers are satisfied and our team is motivated.

"Matt and his crew did an excellent job with our new Carrier heat pump and Nest thermostat. All aspects of the project from the initial review, the quote, the installation and the followup were timely and professional. I would definitely work with Air Quality again. Five Stars."

"Excellent company - Professional and Competent through all stages of my electrical upgrade, solar system design, solar system installation, and instrumentation start-up of the solar system. Always in communication and a very well-organized company. Mallory, Sam, and Lindsay worked as a team coordinating my project from inception through completion, along with integrating their activities and logistics with my roofer. The two trades worked seamlessly through the whole project. The onsite tradesmen Danny, Brian, Josh (and many more) were professional, communicated with me daily on the project status, and even got positive comments from our City Inspector. Those comment made me feel confident that their work was performed with attention to detail and high quality. And it's comforting that Jeremy the president personally made a point to assure I was happy with the work and understood the installation of the solar system and the operation of the solar system instruments. Since the system was released to me, I've had zero issues with the trade work they did, the electrical or mechanical systems or components, or the solar system instrumentation. This is an excellent company."