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Well summer is over, Fall is here and the “white stuff” is on the way. Please take some time to look at your heating system and consider having it serviced BEFORE you really need it! Most of us turn up the thermostat and/or shower when we are cold and think nothing of where that warmth comes fro...

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Time to do maintenance on air conditioning systems. If you don’t have air conditioning give us a call and we can hook you up with a great mini split before the weather gets too hot.

More windows for Gerry Dumont our of Antrim! These custom windows were a challenge to put in on a trailer home. We work with all brands and will install any window, anywhere you want! Call today for a quote or any questions regarding an install and features!
(603) 494-8645

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We now offer full installations for mini splits! We work with all brand manufactures and we give you the absolute best pricing and install guaranteed! Call or email us today for a quote or any questions regarding installs or quotes! We are happy to hear from you!
(603) 494-0494

We have spent the winter working on expanded service and installation offerings. We have obtained the proper certifications and training to now offer mini split system installation and service. Now is the time to think about adding this great technology to your home in the spring putting those ta...

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In light of the upcoming snowy weather take some time to keep venting clear from snow. Also if you have an oil tank that is outside it’s best to cover the filter and lines and protect them from the direct cold. Oil starts to gel around 20 degrees and any water in the tank will freeze.

603 made a stop to a state job! Fox Forrest in Henniker received a new Becket AFG burner, insulated fuel line with a full EMT jacket covered protection layer, and a vibration loop with new spin on oil filters for easy replacement down the road. Not the easiest one to do, many obstacles to go arou...

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Leaky condensate return line buried in a 4 foot thick brick wall built into an early 1900’s storefront/apartment building in Laconia. The water level sensor in a commercial 1.5MBH+ steamer was tripping out several times a day leaving tenants cold.

603 OBS will not be around this weekend (25th-27th) If you have service, we can attend to you on Monday.


2 months ago
Pete worked tirelessly on our problematic two year old boiler that was never set up or worked correctly, going through it with a fine tooth comb. Our boiler had been experiencing incomplete combustion causing a dangerous carbon monoxide problem that went undiagnosed and unaddressed by our previous service company, as well as stinking up our house with exhaust fumes. He also made some tweaks and brought our off boiler hot water heater up to code, and installed an inline fan to induce a good draft up our chimney, as well as rerouting our exhaust pipes from the boiler into the chimney to make it safe and code compliant. We are so grateful for all of this after two years of issues - 603 Oil Burner Services are our boiler people from now on, and we would highly recommend them to anyone!
- Lise T
4 months ago
Highly recommend using 603 Oil Burner Services! They did an amazing job. Quick, professional, knowledgeable, and very reasonable pricing.
- Sara E
10 months ago
We just bought a mobile home with a furnace that hadn't been serviced in 3 years. We called a large local company who played around with it for a bit, got it to run and then left. It never ran after that. They never mentioned it was running at 60% efficiency or how bad the electrical was. We called these guys since they had good reviews. Kyle found out we had an air leak somewhere in the system and Peter showed us where the burner was completely broken apart and shorting it out. We decided to do a new furnace from them. They gave us a reasonable but worst case estimate, showed up on time, hauled the old furnace away and got it installed in just a few hours. They even swept up when they were done. They came in way under estimate and did an amazing job. I would recommend them to anyone I know, the price was very reasonable and they did an excellent job. I definitely would have thought we were going to pay a premium for the care they took and how good it looks now

HVAC and oil system service

603OBS doesn't sell fuel, we sell service.  Our goal is to provide competent, friendly service to our friends and neighbors.  We also install new heating and air conditioning systems including mini splits

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  • (603) 494-0494


Get directions
561 Thain Road
Hopkinton, NH 03229
United States

Business Hours

Mon:Open 24 hours
Tue:Open 24 hours
Wed:Open 24 hours
Thu:Open 24 hours
Fri:Open 24 hours
Sat:Open 24 hours
Sun:Open 24 hours
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