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Originally Posted by themoose  how big is the room your using that size air filter? I'm thinking a goped or pocket bike air filter for my 2ftx2ft grow box. definitely a good idea.  |
2ftx3ft. it is a car one for small engines. I use this one cos of the 3inch neck. A bike filter will have a smaller neck. Probably bout 1 - 2 inch max which could restrict airflow.