Wicked thanks Tom. I did google large computer fans but just got a spammage of ads for power supplies and such.
I think I will get two and route them into the PSU of the PC. That way the room can cool as the PC tries to heat it up. That's the issue really. I am so dependant on having a PC running for everything that when I shut them down it cools in here fast but I am quickly climbing the walls in boredom.