As they say "fail to plan, plan to fail" This will be my first wfp winter so ive been thinking ahead 2 - ive been looking at a 1.9/2kw propane heater with stat off the net for about £90 for the back of a berlingo to stop the pumps etc freezing, but it will b tight as ive a 500l upright fixed behind the bulkhead. Id have 2 leave the windows slightly open for venting, but im wondering if this is to dangerous?