I need some sort of air conditioning for the back of my van. It's an ex-home office van that was used to transport high-security prisoners, and it's got a reinforced steel bulkhead behind the front seats. I need to take this out, but at the moment it is useful. There is a slit that's probably a foot high, and I want to push air from the front into the back. I'm thinking of using the fan from the Berlingo radiator connected to a second battery. Has anybody tried something like this?
There is a small roof fan connected to the ignition, but it's pretty useless.