i use a Parasene Frost Shield Electric Heater about 40 pounds at homebase, my system is in a Ifor Williams Trailer (bit smaller than a van) had socket put in the side to power it, mite pay to try a Paraffin Heater if its is no good then most stores now days will refund you if thats the case. but this time of the year your ROs need protecting because of the membranes being so thin.
andy
dorset
fed member