Best boiler installation pros near New Haven, CT

"Yes, one day install conversion from tank electric to tankless gas with water softener"

"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."

"Timely, accommodating, and professional. Highly recommend Mull Bros. 75 years in business says it all! Wonderful staff and installers!"

"They came quickly to assess my situation and provided an estimate on the spot, in writing. When I had a follow up question, they returned to see my existing boiler again. On the date selected for installation, their people arrived on-time and were organized and polite. Their price was comparable to the other quote I received, but I feel their service was better than the other company."

"Prompt, efficient service --- Technically knows gas furnace products --- More importantly knows the economics of keeping up with repairs on a 30 year old unit vs going with a new unit --- Not a sales pitch -- just facts ---- Went new and the cost including nicely done installing was much lower than I originally thought it would be . Review by Clark D. in Madison CT"

"Furnace was not operating because the company's automatic delivery system ran me out of oil.
Technician showed up promptly and got the furnace operating but could not get heat into the house. Had to reschedule to have zone valves replaced. Technician show up late and didn't have the required parts. Had to reschedule again.
The third technician showed up on time with all the correct parts and worked most of the day to get the system operating properly.
He was completely knowledgeable and very conciencious that everything was working correctly.

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Frisco Mechanical is dedicated to providing our clients with the very best in installation, service, and repair for your heating and cooling needs. Our company is built on honesty, integrity and transparency. We specialize in central Air Conditioning and cooling systems as well as all types of heating and furnace systems. We take pride in the quality of our work and our commitment to outstanding results. We look forward to building long-term relationships with our clients, and guarantee your satisfaction.

"The work was scheduled and carried out within one day of signing the contract. However, I was promised that a NATE certified technician would be doing the installation, and this did not happen."

"It got done, unfortunately required a full system replacement."

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.