Seeing as a month ago they just shipped me a new one to replace the defective one and it was a double diaphragm, it better be the 4.5'er!! I will email my contact there and see.

EDIT: Where did you see 4.5 CFM? I'm not seeing it?

EDIT EDIT: Just got word back from Koenders and they said only their electric units will produce that much CFM.

Last edited by wbuffetjr; 12/10/15 10:30 AM.

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