Get matched with top central a/c installers in Port-costa, CA

"The plumbing technicians came out as promised to assess the leak. They were both very courteous and kind and assessed the damage. I am giving three stars because they estimated the cost to be almost 250% higher than what the actual cost was to fix the issue. I am sure there are customers out there that would just accept any bid however, please get multiple beds for these projects, especially when working with this company as they will inflate the cost to take advantage of the situation. I ended up only paying for the $79 estimate."

"They do an outstanding detailed job on examining your equipment and explain the problems that are going on and problems that might arise and then back it up with pictures. They send all this info to you via your computor. They also do a great job cleaning up after they are finished. They are very professional!"

"Great except problem was not completely solved. "

"Had another company come out and try to sell me a new A/C that I knew I didn't need. Hassler came out next day and fixed the problem in a matter of minutes. Thanks!"

"Juan and his team were top tier professional. From the initial consultation to the hvac installation, they handled everything with care. Juan was so thorough answering my questions, the install was done in time, and everything was to spec. When I contacted him with an issue after install, him and his business partner came to take care of things immediately. I wouldn’t hesitate to recommend them in a heartbeat. So grateful for the work they did with removing our furnace and installing a split unit heat pump. Thank you Juan! "

"Personnel were friendly, explained clearly how the system would work. Showed up on time and completed the work as promised."

Established in 1989, North Bay Air Systems, Inc., prides itself on an outstanding record of quality service and attention to detail. With over 18 years experience in the industry, Ron will work hard to insure that your needs are met in a timely manner. \n\nThe quality of workmanship you will see with North Bay Air Systems will be beyond your expectations. We offer expert installation, maintenance and repair services by a team of highly skilled, professionals.\n\nWhatever your needs, either service, repair or installation call North Bay Air Systems today!\n

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.