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Typical Greater Boston range for this kind of work, from regional averages — not a quote from Fossil Fuel Enterprises. 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
Twenty-five minutes: that is how long a Braintree customer said it took a Fossil Fuel Enterprises technician to arrive on a Sunday evening in March 2023, when a water heater was leaking badly. The tank needed replacing, the office called first thing Monday, and the crew had the new tank in within three hours, with a nor'easter forecast for the next day. The company describes itself as a South Shore heating oil and HVAC outfit offering fuel delivery, heating and cooling service, maintenance, installations and 24-hour emergency service, across towns from Braintree and Milton to Hingham, Marshfield, Duxbury and Kingston. BBB lists it as Fossil Fuel Enterprises, Inc. in Weymouth, with 22 years in business and an A+ grade. The other written review points the opposite way. In February 2022, a customer who had asked a technician to prime an oil tank found a late-evening fee on the bill about a week later, because the technician had waited about 20 minutes and the visit ran past 4 p.m. without the fee being mentioned. The customer wrote that office staff hung up on them twice and that the company then emailed to say the account had been terminated. A Massachusetts HVAC licence, #5680-SM-M1, is active on the state registry in the name of David K Bishop. BuildZoom lists a home improvement contractor licence, #195979, for the company.
I made an emergency call to Fossil Fuel last night (Sunday evening). I panicked because my water heater was leaking quite a bit. The Tech was here within 25 minutes. He stated that he could tell by my voice that I was really worried. I needed tank replaced. He informed the office and I received a call from Fossil early Monday morning. The techs arrived at my house and had the tank replaced..all in less than 3 hrs.! It makes it more amazing that there is a north-easter predicted for Tues and they still fit me in! ⭐️⭐️⭐️⭐️⭐️🌟 Renate Braintree
Let me attest to the fact this is the most rudest and unprofessional customer service oil company I have ever dealt with. My experience today is for me to request the technician to prime my oil tank. When the technician came and I was almost home. However, he waited about 20 mins and he did not tell me anything about late evening fee will be applied. About 1week after, I found out the charges and called the customer service. She kinda explained everything since he waited for me and the time was after 4pm. I have to responsible for the charge. Honestly I did not really satisfy with the charge and she hung up my phone harshly, which was unacceptable. I called again nicely and other staff told me the same thing. The charge already been made and no negotiation. They will close my account due to my unhappy service. And I told them i will call back if i want to do so. After 10 min, they emailed me my account is terminated without my permission, which is ridiculous and horrible customer service that i had ever received. They hung up my phone 2 times. If you are looking for nice and professional customer service, please do not consider them. I will take my business where I am treated with dignity and respect. If you are looking for that do not order from Fossil Fuel
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1 change recorded — last scanned Sep 17, 2026.
Transparent diagnostics5.0
Broad plumbing and HVAC range5.0
Repeat, years-long customers5.0
Water heater and boiler installs5.0
Two AC technicians out within a few hours5.0
Water heater installs4.2