Maybe this is a totally crazy idea, but as the van I have has a rear compartment heater, I was thinking about building a box around it to use the warm air to dry clothes (e.g. wetsuits). Obviously a suitable exhaust would need to be found, and no doubt plenty of other things to think about, but before I pursue this, has anybody heard of this being done before? Is it half sensible? What other uses have people come up with to utilise the heater?