In a message dated 8/28/00 11:33:04 PM, [log in to unmask] writes:

<< On the subject of ventilation, I was wondering what others thought of
using both the slatted rack ventilation board along with the screened
bottom board?  ... Will they interfere with mite drop do you think? >>

This is precisely the reason I've chosen not to invest in slatted rack
ventilation boards. I haven't tested whether they interfere with the function
of screen boards, nor am I aware of any tests performed by others, but it
seems reasonable to expect that they would.