Something like this? Or the more traditional split air con system that has a small unit on the wall but needs a huge box outside somewhere that actually does the work?
Air conditioned office for me as well, with a nice 9 mile ride home at half 4 to contend with. I had to walk down the yard earlier on, it's only half a mile from where I am to the shed and I was sweating buckets by the time I'd got back.