Finally got the Hot Blast installed late Tuesday night, threw in some wood for the evening thinking that I'll start the coal in the a.m. Since it was too late for the wood to get down to ashes. What a bad night, fire got started about 10 p.m. woke up 5hrs later freezing, got fire going again and back to bed. 6 a.m. alarm clock rings, I go check on the fire and it was just a little bit of coals left, that's when I started the coal. I got some coal loaded and burning then finished adding the rest. When I got home from work to my extreme excitement the house was warm, I checked on the furnace and had enough hot coals to go another hour or two!!! First time with coal and having it last me 9-10 hrs made me ecstatic. Now my wife was off of work that day and me being very nervous I had her checking the temp. every half hour to make sure we wouldn't overfire the furnace. Last night was another success and being off today I was able to "baby sit" the furnace which makes me feel good about leaving the house tomorrow for work with the coal burning on it's own. Hopefully I don't run into problems because I'm really enjoying the ease of use.