I have a big car part at the bottom of my house , with double gates to drive straight of the road, it houses my van (04 scudo) I also built 2 sheds in to it , 1 houses my Ro and 1000ltr ibc, I find in the winter I don't have to put oil filled rad in back of van , untill temp. Goes below -4 deg. Never have to defrost windows in the mornings, and every thing is secure , it is also alarmed.
Daz