Quote Originally Posted by johncar54 View Post
Not that it is important but for info.

Fans do not cool the air they actually very slightly increase the temperature in a room, i.e the heat coming from the motor.

What do they do ? They increase the air flow across one’s body thus any moisture on the skin (perspiration) is evaporated more quickly. Evaporation requires energy, i.e. heat, thus the heat comes from your body and cool you down.

So no point in leaving a fan on if you are not in the room, you are just wasting electricity.

PS For the Doubting Thomas's. Put a thermometer in front of the fan. The Temp will not change.
We installed inverter type air-con in every bedroom, but we very rarely use it since both of us prefer to have a regular fan on low when we are sleeping.
We do use the air-con now and then if we find the mercury rising far too much in summer time but only to cool us down and not running all night long.
The newer inverter type air-con units are not expensive to run at between 50% - 85% less than non-inverter types.
The very latest air-con units even have so called clean air filiters which (reputedly) mimics "fresh clean" air going into your room. The only downside being cost. That will surely reduce over time .

A simple fan suits us well enough.....

Has to be said that almost all of our guests staying over will use air-con....