Get matched with top geothermal heating or cooling system installers in Guilford, CT

"Exceptional service from the initial diagnosis to repair, superb team. I appreciated everyone's thoroughness, willingness and honest business tactics. They provided a safe environment for me to ask questions and we explored all options. Ultimately, Joshua, sealed the deal by being caring and understanding. His expertise showed but most importantly his work ethics and integrity was felt. Many thanks to the whole team Brett, Joshua, Jason and Peter delivered Top notch service. Lastly, the communication was A+. Loved receiving text messages with photo id's, true professionals. Highly recommend! You won't be disappointed!"

"Onofreo Home Comfort Systems LLC was wonderful from the first contact in February 2026. Chris came and had a look at the house, the old system and asked what I wanted and how each room was used. He was so knowledgeable and personable. I really felt comfortable with his level of expertise. Mike & Patrick showed up each day ready to work. Mike was very communicative; letting me know when he arrived and left each day and summarizing their progress. My cat was not stressed out by their presence, which was comforting as well. The ladies in the office were so friendly and professional.The design was refined to a Bryant Heat Pump for the main level with an Ecobee Thermostat and a Bryant Mini-split in the basement. This meant that I did not lose any closet space for vents and each system is well suited for their purpose. I would definitely recommend Onofreo! They are a great company you can trust for your next project at an amazing price."

"Arrived the same day, replaced leaking unit. Very professional and neat."

"Perfect as I expected and more. East Coast installed a central air system and a ductless heating and calling system in my house. They were much affordable than their competitor."

"Fast and reliable"

"My AC was not working Precise came out and fixed the problem . I was very pleased with the service and professionalism. I will be using for all my maintenance and repair needs."

At Complete Building and Mechanical, 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.