Hi benny, u got PM!

When u have heat transfer, somehow the heat that has been remove from the tank has to go to some place. So if yr room is air tight(closed), it will be extremely hot. I suggest that u open yr windows and like wat u say use a fan to circulate the air, so as the hot air can escape from yr room. Eventually the compressor will be able to cool more efficiently and thus save on PUB bill.