Recently bought a Dyson air purifier (DP04)

Air conditioner I only use it for 2 hours then switch to dryer mode and keep the air purifier switched on.

Does an excellent job at keeping the room cool despite our room being on the 3rd floor.

This is a big change from the Sharp air purifiers we used to use that could never keep it on through the nite as it is noisy and somehow always felt it affects the efficiency of the air conditioners.