Quote:
Originally posted by hara
Okay, could somebody estimate for us the total heat that these bongs would dissipate with 4x 78cfm 120mm fans and that large pump?
This is an estimation:
Computer: 80W of heat to the water
Pump: 200W of heat to the water
Primary Heater Element: 500W
Secondary (Variable) Heater Element: 400W
Is this good enough for the bongs to handle? Is it too much? Or is it too little 
Thank you for your replies 
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Don't know how to calculate it, but you lack a key info: your average ambient moisture. as the main cooling effect of a bong is from evaporation, you need to live in a dry climate to be effective. If your air is "wetter" no evaporation can occur, and the only cooling you have is normal convection on the water drops.