good info all, I'm taking this all in as I visited the dealer yesterday and am seriously considering a Koker.
I noticed the Koker in the showroom had no flange on top for ducting.
One question I failed to ask: How do you securely duct into your system? I would have figured there would be a 1" or so flange to screw into???
BTW, jrw thanks for the cleaning info, I had not considered exactly how to handle that job....