I used a paraffin heater last winter and it "imploded", never again. Everything in the van got smoke damaged. For every litre of fuel, they give off a litre of water vapour and when we had the really bad weather it wasn't up to it at all. I use an electric, oil filled rad now on very low and it was great last Feb. Only of use if you can park the van v close to the house though, not right for everyone.