Our is a tropical country so it is expected that the air conditioner is a necessity particularly for the middle class (and the rich, of course). But those who are conscious of their electric bill, one tv network has come up with a trick. Set the timer of the air conditioner and when it stops operating, turn on the electric fan. The cold air will remain to circulate in the room for at least an hour at night. However, the cold vanishes faster in daytime especially when the sun is hot. But still, a good 15 minutes of turning off the air conditioner will matter in the electric bill.