I am burning good dry hardwood and still plugged my cap last week. What is up? I am heating 2400 sq ft of well insulated home. We've had an average winter here in Ohio. I can normally keep the entire house at 72 or higher without taking the air control much higher than its lowest setting. it is a 1.5 story house with about 5' of chimney above the roof line. Keep in mind the quad uses an air cooled chimney pipe, not an insulated pipe. I have been burning wood for about 4 years now and the cap has plugged about half way thru each heating season since i started burning. I used to blame it on not having seasoned wood, but now i'm not sure that's it. any thoughts??