[colin bird]

hi thanks for reading,i have a 40 ro van mounted system in my van,wahts the lowest wattage heater i can use without inside of van freezing
 just looked a t  750 w oil filled rad would that be enough ?
im in the south

[Smudger]

That's perfect.

I used to set mine just above the frost guard setting, van was always protected even when we had the bad winter 4 years ago ( only minus 7 here in Norfolk )

Darran