I bought myself an air chamber, rather than pay for my carport to be converted into a garage. The chamber is not intended for use ‘outside’, but in reality people install them in carports all the time. This purchase was suggested by a friend who told me that rust formation on his ancient Mini Cooper had been arrested by one of these ‘tents’. My decision was helped along by a discount offered to Porsche GB members.
The chamber was pretty easy to assemble and was a perfect fit for the space available. I found a crack in one of the tent poles which was replaced by the manufacturer within days, without any problem. Since then, I’ve made a few modifications. Unhappy with the tendency of the roofline to sag a bit, and flap a little when the Scottish wind level reached storm force, I reinforced the roof, as shown above, with a couple of curved tentpoles and some zipties. No more flapping.
The only other point to make is that, since the fans are drawing in atmospheric air, the inlet moisture content on a wet day is at 100% humidity. I was curious (since I know a bit about engineering thermodynamics) to discover what the net rate of drying inside was. It turns out that, on the wettest day possible, 5% of any liquid water evaporates overnight (and is removed via positive pressure driving air through the zips and gaps).
The website for this product is ghastly (draping miniskirted women over Ferraris is such a limp sales ploy) and I’d be happier if they’d show more interest in licensing my design modifications. Otherwise, it’s working well. I’ll keep you posted.