Hi people, in my last post I give you the url to my indoor lighting calculator, and in this post I want to give you acces to my indoor ventilation calculator. Indoor Ventilation Calculator: http://cultivoloco.blogspot.com.ar/2014/08/calculadora-de-ventilacion-gabinetes-de.html Cheers Cultivoloco
Here use this if you can't find der engrish button: http://www.just4growers.com/stream/ventilation-and-environmental-control/how-to-calculate-the-size-of-your-extraction-fan.aspx It has a lot of interesting write up when you go back into some of the other pages.