Get matched with top geothermal heating or cooling system pros in Modesto, CA

"Its good service. Great people. I never had a bad technician. I've been this company for 11 years now. I will recommend them to other people without questions."

"I bought my home 6 years ago and from the beginning I used Cencal as my HVAC maintenance and repair company. Ignacio and the boys have always been very knowledgeable, professional and courteous. I recently had a new system put in my home, the other was over 15 years old and on its last leg. Brandon came and explained everything and answered all my questions. As this was my first high priced purchase for my home, he made everything easier. Jason also was there to answer any questions I had. I cant say enough about the girls in the office, to Jason and Brandon and the guys in the field. they have always made me feel like part of their family. For the new system, they not only were on time, but they also finished the job in less time than they/we expected. They are very responsive to my emails, calls and questions. I would absolutely recommend Cencal to any and everyone looking for amazing service, affordable prices and awesome employees!!"

"Mr. Ferrell worked with my husband over the phone to fix the problem. It was surprisingly fast and stress-free. To have the work done remotely in less than an hour was wonderful."

"Great now it cool. Same day service with a smile!"

"Had Tim out and his guys to replace and move my system. Moved all my duct work from under the house to above the house I hated having the vent on the floor! Also moved my system from a closet in my kitchen to the attic which gave me more space to expand my pantry! The guys were all polite and would clean everything after their work day! They did a great job with all the work! Would definitely recommend Tim and his team!"

"Mega Power Electric is an excellent company to work with. Gary and his team are knowledgeable, honest, and will go out of their way to get the job done right. We installed panels and solar battery storage unit in our home and we're reaping the benefits of being clean and green."

"Exceptional product and service, Long's Air Heating and Cooling put in a system that is more effective and efficient for my home than was installed previously. They arrived as scheduled and where professional and courteous. Cleaned up everything nicely. I have already recommended them to family and friends and will continue recommending them. P.S. Long's also provides a twice yearly maintenance with the first years maintenance free. Thanks Jordan"

Sierra Eco Systems specializes in (GHP) Geothermal Heat Pumps, aka Ground Source Heat Pumps. Our customers save big (average savings $3,000/yr for a 2000sf home) by hiring us to replace their air source heat pump or fossil fuel furnace (propane or oil) with a GHP. GHPs are 400% efficient, extracting 3 parts earth energy for every 1 part of electricity (solar works too). The most efficient electric or fossil fuel furnace are 100%. \n \nGeothermal is the best way to reduce heating & cooling costs according to the US Environment Protection Agency, the US Department of Energy, the CA Consumer Energy Commission, and a dozen other agencies. After decades of study using actual research, not speculation, experts agree that Geothermal heat pumps can heat, cool, and provide domestic hot water more cost-effectively than any other system available today, can last twice as long as conventional systems, offer greater safety (no combustion, no carbon monoxide risk) and greater comfort

"At first it went well. The technicians were professional. They said the install would take 2 1/2 days. The first two days were fine. They asked if they could change the date to finish the install and we said yes. They came for the final 1/2 day of work which turned into a whole day. Early in the afternoon, one technician said he had to leave early. No problem. The other two technicians said they could finish. It went on and on. The two technicians could not figure out how to wire in the thermostat, and they finally gave up. The heat would turn on, but never turn off by itself. My mom had to keep getting up in the middle of the night to turn the unit on and off again to keep from freezing or sweating like in a sauna. They said they would be back the next day to install a simple thermostat and have everything working correctly. .they did not return. Everytime I called the technicians would tell me they were working on roofing jobs for other customers that had to be finished immediately because it was going to rain. After two weeks of this ********, I put my foot down and said I wanted my parent's job finished. Two technicians came out one more time and installed a new, very simple looking thermostat. I thought everything was great and thanked them, only to find out a year later that the new thermostat had also been wired incorrectly and would not come on or shut off on its own. This was the first time my mother has ever had central heat and air. She didn't realize that the thermostat wasn't working properly, and I didn't find this out for an entire year. My mother had a schedule posted on her bedroom wall reminding her when to turn on and off the unit to keep the temperature comfortable. Needless to say, I was ******. I called and asked the company once again to fix the problem. This time they sent out Amoz Marshsll. He was knowledgeable, professional and polite. He fixed the wiring problem in 15 minutes, apologized for it being done incorrectly the first two times and left. He was amazing. I wish he had installed the original unit."

"Excellent. Very well versed in the workings of the HVAC systems."