Our customers love us and we know you will too!

Jon T. in Somerville
via Home Advisor

"I had to have central A/C unit relocated while a new patio was installed. Prendergast was great - extremely responsive and helpful. They did it sooner than anyone else could and for much less than some of the other quotes I got."

Marge F. in Lexington
via Yelp

"We just had our boiler and hotwater heater replaced by Predergast Oil. There was alot of work involved. Dealing with Tom and his entire crew, from giving us an estimate (extremely competitive) to having the work completed, was an excellent experience. We were impressed with their expertise and workmanship. They were a pleasure to have around during a very stressful time (no heat). As Tom told me, he instructs his employees to work as if someone was doing the same thing in their home. HIghly recommend this company."

Simon K. in Watertown
via Home Advisor

"I had an odd problem with one (of seven) zones of heat in my house not working properly. I had called the company that installed my heating system (gas/forced hot water) and they'd come out twice, charged me twice, and not been able to fix it. Decided to try someone else and Prendergast was the only company to respond to my Home Advisor search (I guess most companies don't want to deal with diagnosis and would rather just service, install, or repair). Tom called me, got the details of what wasn't working, diagnosed the issue (stuck pressure relief valve) over the phone and gave me very detailed advice on how to fix it myself. Problem solved, and for free! Can't recommend them highly enough, and will definitely be calling them for any future work"

Ted T. in Belmont
via Angie's List

"First, the price is great. I looked at all options and the closest I found was someone willing ot do it for 3K more, but only if I paid cash. Second, I can be a nervous homeowner when it comes to big repairs. The owner was great and explained things so even I could understand. Third, I literally got like 100+ years of experience in the crew he sent over. When something wasn't perfect it was addressed immediately as they "Needed" to know why not. They were spot on and kept coming back until it was gold standard (please note, I did have the dirtiest boiler they had ever seen, hence the number of trips). My wife was against the change...and now sees just how great a job they did. Even my father in-law complimented me. Though I will only see them again for routine maintenance, they are in my contacts on my phone so I can recommend this company further. If you happen to be reading this, thanks again."


Products & Services

Oil & gas heat, central A/C

We do everything - new installations, oil-to-gas conversions, maintainence, repair and troubleshooting.

Radiant floor heating/radiant snow melt

Do you hate walking barefoot on your wood or tile floors because they are too cold? We can fix that!
Tired of shoveling your driveway or walkway when it snows? We can install heating underneath so you don't have to!

Ductless Air Conditioning

You really want air conditioning but don't have ductwork at home? No problem! We can install a ductless A/C unit on your wall.

Oil Tank Insurance

Oil tank insurance

Have you ever considered the damage that could occur if your oil tank leaked? We recommend Tank-Guard oil tank insurance in to safe guard against an emergency.


Service Area

Serving most of Middlesex and Suffolk counties

Please see the map above for areas where we provide service. For any questions, please call us at (617) 484-7771.