The scarifier airs the turf well, no question. However, the pot is small and therefore very fast. It applies to operation without catcher should be noted that the protective flap of the scarifier is not very stable. On the first day in use broke a small stone from the earth, the protective flap with the result that the scarifier was unusable both with and without collecting basket. This is clearly a deficiency in processing as a mode without catcher should be quite possible according to instruction.
Conclusion: ventilated good, but only with collecting basket, as the operation is otherwise uncertain.
