In 10+ years of (3 different) Eriba ownership we have used our gas Truma heater once only - and that was this April on a chilly night. What a faff having to add the chimney extension. Personally, I would happily remove the Truma, the chimney and all the gas piping and vent tubing and save that weight, then just use an oil filled radiator if needed. You would gain space in the wardrobe too... Then I'd reconfigure it all and build in a microwave and a larger fridge... Those, at least, would get used all the time. It seems madness to haul something around that you never use and that needs safety checking every year as well.... Harrumph - rant over