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D & M Heating does heating and cooling work, and on HomeAdvisor it holds a 5.0-star average from 13 ratings. Its HomeAdvisor profile says it specializes in central A/C and cooling systems as well as heating and furnace systems. A 2026 customer said Derek came over within an hour to service their oil burner, got the job done in less than an hour and charged a fee they called very reasonable. A 2025 customer wrote that Derek installed an oil furnace in less than half a day and that they were next working with him on a Generac whole house generator. A 2025 reviewer said D&M was the only reasonable one of three quotes they received and that the installation was done in a timely manner. A 2024 customer said Derek Palange knew right away what had to be done and that they were having him back to clean their furnace. A 2023 customer said Derek serviced their furnace in addition to the heat pumps.
Derek responded quickly to my request for service on our oil burner. He was able to come over within an hour since he was in the area. He was professional, knowledgeable, friendly and got the job done in less than an hour. His fee was very reasonable and we already asked him to do other projects in the near future. I would 100% recommend D&M Heating!
Great job
Derek was quick to respond to our needs. He installed an oil furnace in less than half a day and it works great! His estimate was more than fair and his work ethic is rate. We would highly recommend him for any HVAC service. We are now working with Derek on a Generac whole house generator. Highly recommend but hate to share him.
This business is excellent. We received three quotes from various businesses and D&M was the only reasonable one. The installation was done in a timely manner. The owner did an exceptional job and was both professional and efficient. Based on his service, we have decided that from now on, all service for all boiler will be done by this organization. You cannot go wrong with D&M. I highly recommend him!
Great job. Very knowledgeable. called within 10 minutes of putting out the request for the work. Came out and installed same day. Highly recommend. I will recommend to friends and family.
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1 change recorded — last scanned Oct 4, 2026.
Typical Maine range for this kind of work, from regional averages — not a quote from D & M Heating. Use it to sanity-check bids, then get the real number in writing.
Estimated range
$4,500 – $10,300
Typical HVAC project around $7,400
Replaced an old boiler system3.9
Gas furnace installs3.1