Oil Furnace In Outbuilding

Old 09-07-19, 10:04 PM
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Join Date: Oct 2014
Location: Canada
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Oil Furnace In Outbuilding

This just something that I'm thinking about doing. I have an outbuilding that I would like to be able to heat while I'm working in it. I would probably only be in it less than ten days per month so, I don't want the heat on continuous. Electric heat is not an option. My only choices seem to be oil, propane or wood and I'm looking for a way to do this cheap.

I have an old oil furnace that I got for free. It is actually still in pretty good shape. It's an Anthes/ Inter City forced air unit, 97000 btu, if I'm not mistaken. I have a small tank and a chimney with it. Anyway, I'm thinking of installing it in my outbuilding with the tank located outside. I don't have room inside for the tank and don't want it inside anyway.

Here is one thing that I'm wondering though. If I only use the furnace occasionally, the building will be cold inside. I want to be able to just go in, turn on the power, turn up the thermostat and have the furnace start and run. Winter temperatures could easily be -20 or colder in January and February. Will a cold furnace in a cold building be able to ignite the oil? Will it hurt it to run it this way, provided it starts in the cold?

It will be a deal breaker if I have to start the furnace in the autumn and leave it running all winter.
Old 09-08-19, 07:00 AM
Join Date: Oct 2016
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Flue gas could start to condense and lead to heat exchanger damage. Oil could also start to gel, especially if it’s been in the tank a while and isn’t treated correctly.
Old 09-08-19, 07:41 AM
Join Date: Aug 2018
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I would typically recommend an infrared heater for this application, but it is electric. All other heat forms are going to take a while to heat a space from negative Celsius to a comfortable temperature. How big is the space?

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