Bang, I have to disagree with you. The temps that beckzilla showed with his new setup are still plenty high for evaporation. Dropping the temp from 115 to 95 can only be an improvement. If the tank is in an open room with no walls near it, the 2 fans blowing in method would work fine as long as the back of the canopy is open. The problem he was experiencing is that with the tank against a wall and both fans blowing in he was expecting that the air would blow out the back while not even thinking that this was totally short circuiting his cooling system. What he was essentially creating was a regenerative heating system. The intake from the fans was not far enough away from the exhaust and was recirculating the warm air back into the canopy. Not only this, you have to take into account the dewpoint, wet and dry bulb temps in the house. As we all know, water evaporates quicker in the winter when the air is at its dryest and slower in summer when it is most wet. But without getting into the thermodynamics of his home, 95 degrees is plenty warm for efficient evaporation and anything above that is going transfer more heat to the water. Regardless of the difference in density between water and air, heat flows to the lower temperature sink. And the more heat you have above the water, the higher the water temp is going to be. The great thing about a wet/dry system is that it acts as a cooling tower. That is why I still use my wet/dry along with a fuge. Fuges are great but the only lower your tanks ability to dissipate its own heat. Wet/dry systems put more surface area in contact with the air for evaporation and heat removal. So not only is he helping with keeping his tank cool, he is reducing the risk of temp swings between day and night.
