>>It just changes form or dissipates (entropy).
That's the point, but ¿why is HEAT the final stage of any form of energy? If the motor I feed is that of a fan, I'll need to waste some energy to move the air which passes thru blades.
If I have to cool TWO rooms, one with a 1000 watt heater and another one with a 1000 watt motor, ¿do you think I have to consider the SAME amount of BTU's in both cases?
PS: I'M DYING OF ANGER with the problem that I CAN NOT submit a comment. Grrrrrr... ~~~~~>:(