Activated carbon filter with 100 mm diameter and optimal flow rate of 240 mc / h maximum 360 mc / h. 
Very useful for reducing odors * present in the air extracted from the extractor. Activated carbons are to be replaced when you start to perceive odor. The average duration is 15 months. They can cause pressure drops in the suction system up to 30%.
* Felling is ensured if the greenhouse is hermetically closed.