Yes, also insulate the floor and roof as a lot of the heat in my old now
defunct shed was lost through those means.
I am going to try to make something similar this year, but it looks like
I'll have to get somebody in, but the costs seem to go a bit mad if you want
anything other than a boring old shed these days.
Brian

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The Sofa of Brian Gaff...

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"Martin Brown" wrote in message
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On 27/02/2018 20:41, Enrie Membership wrote:

I've just had a 6' x 6' shed erected in the garden to house a few
stationary engines which I want to keep above freezing in the winter. I
do have an electrical supply nearby. What are folks thoughts on the most
efficient form of heating that will keep the shed just above freezing
point?.

Insulate the walls as best you can with polystyrene sheet. Try and avoid
drafts.

Electrical Tubular heater 5' 200w (has the advantage of having a frostat
onboard)

That or a modest fan heater on its frost stat setting.

Old fashioned paraffin heater (I would have to light it if the
temperature was liable to drop below freezing)

Absolutely not unless you want everything to rust to blazes from the
resulting humidity. And if anything goes wrong get covered in soot - very
bad for greenhouse plants. Also you need ventilation as well to sustain
the flame.

Any thoughts, comments or suggestions welcome

Electric heating on a thermostat. You might want to monitor the dew point
rather than

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Regards,
Martin Brown