Cyclone fan designed for your grow-room and is very important so that your plants get air moving around them, refreshing the CO2 and helping to keep them cool. Plants “breathe” in carbon dioxide through small pores in their leaves called stomata. Plants like a little air movement because it refreshes the air around them, giving them more carbon dioxide to breathe. In addition to this, a little air movement helps to keep your plants cool during the summer months and when they are sitting underneath hot lamps. The fan blades are designed for lots of air movement and minimal noise while the surrounding guard mesh is tough and prevents objects accidentally touching the spinning blades. A great value-for-money item.