Get matched with top tankless water heater installers in Derby, CT

"Williams & Associates installed a Buderus oil-fired boiler and stainless-steel chimney liner. Bruce's design was a significant upgrade over my 35-year-old boiler system. He clearly explained the process and installation, and he was receptive to my questions. Bruce is knowledgeable, straightforward, and responsive. The price was very fair, considering the quality of the work and other estimates I had gotten. I would not hesitate to recommend Williams & Associates."

"They were very fast to respond to my call and were able to send someone within two hours. The replacement of the hot water heater went well. For the water pipes they use copper crimp fittings instead of soldering so it will be interesting to see how that holds up over the years. My only concern is how they ran the gas line. They use Gastite CSST which is fine, but the CSST is run so it goes downward then back up and then downward again before it enters black pipe that has a moisture trap. It seems to me that if there is any moisture it will end up in the CSST instead of the trap. In addition, there is a pretty good bend in the CSST right before it goes into the trap section. Also, Teflon tape was used on the all the joints instead of joint compound. I think I will get someone from a different company to come in and take a look at it."

"Came early and removed and installed a new water heater within 90 minutes"

"Would hire them in the future if I have a problem. Arrived right on time. The plumber was courteous, did a great job. I can't say if the cost was great because I have no idea what the cost of installing a copper water line to a refrigerator costs. It was more then I thought it would be, but could be what other plumbers charge."

"Very knowledgeable team that helped us decide between a tankless and high-efficiency tanked water heater to replace two old water heaters in the home we purchased. Team performed all work with no visible modification to existing home structures/walls/ceilings and all work was completed in a day. The installer even stayed a bit longer to instruct us on maintenance and usage of the unit considering we are new home owners which was very much appreciated."

"Extremely helpful and professional. Made sure my warranty on water heater was covered. Did a great job!"

At Heritage Heating & Air, comfort isn’t just what we deliver—it’s who we are. For nearly a century, our family has provided dependable, high-quality heating and cooling solutions. Now in our fourth generation, we continue a legacy built on craftsmanship, trust, and doing things the right way.\nWith 96 years of experience, we combine time-tested knowledge with modern technology to deliver reliable, efficient HVAC services—from maintenance and repairs to full system replacements. Every job is handled with care, precision, and pride.\nAs a family-owned and operated company, we treat every customer like family, offering honest recommendations, transparent pricing, and service you can count on. We’re proud to serve your neighborhood with the same integrity that has defined us for generations.\nAt Heritage Heating & Air, your comfort is our heritage.

"They were very professional, showed up time. They did a great job and were very fast--did it in a timely manner. I have hot water now, so I am very happy. "

"Jason was first hired to come to repair a job that was not done properly by a prior plumber. We then needed him to re-vamp our bathroom tub/shower - new controls/tile work. Then another bathroom sink job. then a kitchen sink. We only trust Jason for our plumbing needs. He is licensed, and extremely knowledgeable."