Hi guys,just a bit of advice from you please,as we are new to caravaning and this will be our first winter with our van,we have the van in the garden so will we be safe leaving it plugged in to the mains so the heating is on all the time,the aqua roll is in a thermal jacket along with the pipes for the water pump so they should be ok,so al i need is your advice on leaving the heating on.many thanks.