The biggest gain is that you don’t have to pump out all of the heat of condensation of all of the moisture in the air. Condensing out a pound of water is 200x

The biggest gain is that you don’t have to pump out all of the heat of condensation of all of the moisture in the air. Condensing out a pound of water is 200x more energy-consuming than lowering the temperature of a kg of air by 10 degrees C.