Posted: 13/12/2013 at 00:42
if you have mains.. use what I do, panel heaters.. I have 2 heating 3/4 of my 12 foot x 10 foot greenhouse. Yes I have bubblewrapped the glass and made a 'door' of sorts, coupled with a plugin thermostat, costs pennies a day to run and keeps GH at 7-8 C.
I also have two panel heaters inside my shed, again rigged to a plugin thermostat, keeps my shed.. well workshop, (maybe size of a single car garage!) nice and happy at 18! again pennies a day to run all day.I looked at parafin, infact i got several heaters from older relatives, but for me the condensation was too much, and also they costed out more than the panels..