It's really not that complicated. Thermodynamic processes naturally occur within the system itself anyway every day. It's an open system.....The filter provides the energy, the heater creates the desired temperature, which is more often than not warmer than the surrounding temperature creating condensation and evaporation......What we are attempting to do is further artificially control that system.Dino said:Water to replace evaporation has nothing to do with the water changed out for maintainance.
It is simple thermodynamics, remove heat from a system,the system will cool.
I used this method for over 10 years while keeping fish in a greenhouse in the summers.