Keystoker 90 top vent just cruising with the Coal-trol. With the old Buderus hand fed window stats would be working overtime. This stove setup is amazing. The control is oustanding. The Keystoker is in the family room in the basement, idleing along on the warmer days and kicking it up a few notches with the cooler, damp weather of today. 27 years with the hand fed has been a good ride, but the future of coal burning with the Keystoker looks brighter than the golden years I have to look forward to.