On 27/02/18 21:14, Martin Brown wrote:
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.

I wouldn't - modern fan heaters can be a horrid fire risk - bit of fluff
builds up inside the front grille and you get a red-hot spot (I've seen it).

If you just want a pure heater, oil filled radiator is the safest bet,
or a dehumidifer.


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