All it takes is the flick of a switch! There are 4 models in thisplug and play range, catering for every size and type of hobby grower. Mammoth TT Grow Room Fan. Every hour your Mammoth TT Twin Speed Inline Fan operates, it should be able to shift a certain amount of air, with a number of factors having a bearing here, like the shape and size of your grow room and the quantity, power and type of lighting being operated.
eBay