Member "WoodHog" just installed a new Koker Lite in November. Heating about 2,000 sq ft with no problems. Best of Both Worlds?
Tie it into your main trunk with ductwork as big as the rectangeller hole in the top of the furnace. Make sure to tie the blower inlet to your return duct too, or the heat may not distribute well.
He is a first time coal burner and he was smart enough to put a 5 ton coal bin next to the Koker Lite and get it filled in November. I've been burning coal for years and I have to go out tomorrow to get my third load this season!