I recently picked up the wsm 22.5 and this thing uses a ton of fuel. I had the day off of work so I decided I would do some abt's early and ribs for dinner. Knowing I would be running the smoker all day, I filled the charcoal ring. I've read about people getting 16-18 hours on a single fill. It was about 70 degrees and winds up to about 20 mph in wny today. I was using kbb charcoal and started with the minion method. I began with about half a chimney of briquetes. Smoker was running at 225 pretty steadily with lower dampers wide open. The garbage cans and box the smoker came in served as a wind break. Fire was started about ten am and needed more fuel approx 5 pm. Seems to me that about 20 lbs of charcoal should last more than seven hours at 225. I can't seem to catch a calm day to smoke to determine if the wind is the culprit. Any ideas would be welcome.