3Berries
New member
I have a bunch of different fans I use. You need a watt meter and test before really. They can range quite a bit in wattage for the same size fan. In the smallest tent I use a 2.5" square muffin fan blowing off the wall. veg tent gets a 6" USB at the top blowing down and a 4" 120v blowing up from the floor. Flower tent has a old bath exhaust fan at the very top and ducted down to the bottom. And a 4" fan blowing across the top of the pots. I have another box of fans deemed to inefficient too use regularly.