Hey Zandor,

From the picture it looks like the opening acting as an inlet needs to cover a larger area of the filter so as to spread the airflow more evenly across the entire surface of the filter.

Much the same as the outlet fan needs to draw from an area that sucks air through the entire surface of the filter on the exit side.

Am I correct in this? We have the same type of flow problems with our racecar radiators and oil coolers. Just going through a small section of the filter does not take full advantage of the charcoal area.

regards,
Max Blast