I've been living in my van in the French alps for a few seasons now and never had trouble with my flue until this year. Where were parked gets some pretty severe winds and I was having loads of trouble with downdraught and my carbon monoxide alarm going off nightly. It was a real pain.
I researched and windkat got good reviews. And here I am adding my great review. I fitted one 2 weeks ago and firstly its totally stopped my downdraught, secondly, my fire is so easy to light now, the flue is always pulling. So cheers Windkat, your customer service is great too.
I'm sitting in, fire on, gale blowing outside and no problems.