Yes that is true. They only make you feel cooler because they make a draught.
Energy is supplied to move the air around but friction quickly slows the air down and the energy imparted to the air by the fan is all converted into heat, most of which remains at least initially, in the air.
Edit: The heat loss in the motor is the small part of the story. All of the energy the motor draws from the mains supply (including the majority which circulates air) is converted into heat within a few seconds.
The great majority of the energy we use for all purposes is quite quickly degraded to heat and sooner or later all of it is.
Bramble is right, a fan only gives an impression of cooling air due to creating an air flow.
However the fan motor itself generates heat because it is not 100 % efficient. The losses in the motor are converted to heat as you cannot create or destroy energy, you can only convert from one form to another.
Heat is always produced when energy is changed from one form to another. Run your fan turn it off then feel the bearings.
All motors have some losses which turn into heat.
Fans run on electric... so that they get kinetic energy from electricity......
Their kinetic energy is got by molecules of air in the room......
As you know, when molecules of air get kinetic energy...the collisions between them increases because of increasing kinetic energy......
that collisions increase thermal energy in air....So that extra heat is produced...
obviously false.
I heard somewhere they actually produce heat? How is this true?
