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CNM Heating Cooling Piping installs and services heating and cooling systems and delivers heating oil, and it holds 5 stars from 193 Google ratings. Its website describes on-time oil delivery to homes and businesses, with automatic delivery offered without contracts. A recent Google customer replacing an old Sanyo mini-split system said a 4-man crew arrived early on the scheduled day and finished the new Fujitsu Airstage install the same day, laying down runways and removing their shoes inside. A recent customer said Cody and his team installed a few split units in a barn and got the work done on the day he said he would. A 2026 customer who switched their oil delivery to CNM wrote that the delivery was timely and they had not run out of oil, and that CNM also replaced their forced air system. A 2025 customer said CNM replaced their boiler. A 2025 customer said CNM switched out a 55-plus-year-old oil tank and some parts on their furnace. A 2024 customer said CNM found that a part a previous company had replaced on their oil furnace was not attached properly, fixed it and adjusted the flame, then put in a new oil line the next week. A 2026 Reddit commenter on r/Connecticut wrote that they had used CNM in Mansfield.
Typical your area range for this kind of work, from regional averages — not a quote from CNM Heating Cooling Piping LLC. Use it to sanity-check bids, then get the real number in writing.
Estimated range
$5,000 – $11,400
Typical HVAC project around $8,200
“I've used both CNM in Mansfield and Potters in Chaplin.”
We had mini splits installed by CNM back in May of this year and they did a fantastic job. Their crew worked very efficiently. The job looks very well done and they left everything clean and neat when they finished. We were able to use the mini splits for the summer and now have them on the heating setting for the cooler weather and they've been working wonderfully. It was well worth it for the mini splits and we've been extremely happy with the job CNM did. They were recommended to us by a neighbor but we did get a handful of other quotes. CNM had a great price and did great work. Highly recommend.
Ethan and his crew were very professional in their work. They were very courteous and made sure that they cleaned up after themselves. Would highly recommend for your needs.
We needed to replace a Sanyo mini-split A/C system installed in 2008 for which parts are no longer available. After seeing the house and discussing options on 7/13/26, CNM e-mailed a proposal for a new Fujitsu Airstage mini-split HVAC system on 7/14/26. We were sufficiently impressed by CMN's presentation to accept the proposal and pay the 50% deposit the same day, despite learning that the earliest the work could be scheduled was for 8/17/26. We wondered how firm this date really was, but needn't have worried: the 4-man crew arrived early on 8/17 and finished the job the same day. They were professional, proficient, efficient, friendly and careful with our house, laying down runways and removing their shoes inside -- there had been rain in the night and it was still drizzling when they arrived. It was a pleasure to do business with CNM, and we recommend them without qualification.
This company was fantastic!! They showed up promptly on time, every single time. They were very knowledgeable and install day was quick and easy. They were clean, professional and worked through some nasty rain. I would recommend them to anyone!!
Need Help, call CNM Heating Cooling Piping LLC. When the issue can’t be resolved by others, Call Cody! Cody is the best around. Good with HVAC problems that others can’t fix. Better yet, make your first call to CNM Heating Cooling Piping to get it done right. Bill and Christina
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1 change recorded — last scanned Oct 8, 2026.