The trouble I find with aircon is that it dries your throat out. My Mrs has astma and it tends to make her a bit more wheezy than usual. It's still better than not having any when staying in a hot country, but the fan seems to be the way to go for us,especially as the Dyson claims to be so quiet which most air con I've experienced isn't.
Yeah air con can defo irritate the throat, I find that on holiday sometimes, you go to bed with it on and then wake up with a dry throat!
Dyson is worth it mate, it’s a really nice air flow, it doesn’t buffet the air, it’s just a nice stream of constant air, we have it on quite low, but it can blow a gale on the highest setting!