It was probably all of 20 yrs ago that I read the article at it was from a stack of beekeeper mags that were old at the time. There were some good articles among them.I had a search across the NZ Bkpr magazines, but didn't spot anything. Actually, I'm a bit surprised that there aren't any really complete and useful articles about hot rooms. Often mentioned as part of the overall process, but I just thought I might be able to find something that at least gave a framework for temperatures, air flow, time, etc. The sort of thing Andrew Matheson or Cliff Van Eaton - maybe Murray Reid - would have written...