this is not aircon, it is just an evaporator fan which are cheap anyway, and for £100 you can get proper aircon which will work far far far better.i'm pretty sure i've seen a how to make a air con video on youtube and it was for less than £30.
basically a cool box. fill it with cold water and some ice. and a fan. you then done a few things and boom cheap air con.
youtube is your friend here