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A Friday morning call about no hot water led to a replacement water heater that same day, according to a June 2026 Mull Bros customer. Carlos first tried to replace a valve, then replaced the 16-year-old heater when that repair could not be made. The customer appreciated having the problem explained as the job became more involved than expected. Mull Bros is based in Wethersfield and says it has provided heating, cooling and fuel delivery to the town and surrounding communities since 1945. Its website advertises free estimates and 24/7 emergency service. Google lists a 4.7-star average from 27 ratings, and the Better Business Bureau gives it an A+ grade. Written customer accounts span 2021–2026. Installations include boilers, central air, heat pumps and oil tanks. A February 2026 customer praised Tom and the team for a quick boiler replacement. In June 2025, another said a new AC installation with added ductwork cost less than the other quotes they received. A July 2024 homeowner described replacing a 32-year-old central-air system with a heat pump integrated with existing natural-gas heat. The customer said Tom explained the options, the team added returns and addressed electrical work needed for the installation, and the system was working within a few days. They praised the crew’s answers to questions throughout the process. A January 2023 customer described a 275-gallon basement oil-tank replacement, an annual furnace tune-up and an oil-delivery plan. Another January 2023 customer said Carlos and Chris arrived the morning after a boiler-leak call and finished the repair within half an hour. Some customers object to the service they received. In January 2024, a rental-property customer said the owner repeatedly disparaged a chimney contractor during a visit and declined to change a thermostat because he was not there on a service call. A February 2025 reviewer called the interaction rude and obnoxious. A September 2025 reviewer praised a friendly staff member but said things had not worked out as planned.
We called Mull Brothers on a Friday at 10:00 due to an issue with our hot water heater, we had no hot water. They were able to schedule a same day appointment for 2:00. While we had a feeling it was the pilot light, we also knew it would not be an easy job. Turns out we needed a new valve. Carlos tried to replace but since our hot water heater was 16 years old that was not possible. We had to replace our hot water heater, he did it the same day with no complaints. What we thought would be a quick 10 minute job ended up being much longer. I always appreciate the professionalism & the fact that they explain the issue versus just saying "nope, can't do it". Not the Friday we expected but appreciate their quick help!
Tom & his team are very Professional, efficient, and reliable. They replaced my heating boiler quickly and did a great job. Highly recommend
This place is asl friendly very sweet lady! Unfortunately things didn’t work out as Planned
Mull Bros is professional, neat, on time, extremely fair priced and always a pleasure to work with. They do a terrific job, Mull Bros. always make a tough situation where something breaks unexpectedly much easier to deal with. They have a great team, thank you for all your help!
Search for the best of the best and found the Mull Brothers. They beat every quote we received for a new ac install and adding duct work. They did a phenomenal job, super nice guys as well!
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1 change recorded — last scanned Oct 30, 2026.
Typical Connecticut range for this kind of work, from regional averages — not a quote from Mull Bros Inc.. Use it to sanity-check bids, then get the real number in writing.
Estimated range
$4,700 – $10,700
Typical HVAC project around $7,700
Emergency oil fill within 15 minutes5.0
Water heater delivered and installed the same day5.0
Water heater repair4.6
