Never really timed it . . . a large part depends on my heating needs -- if it's cold outside and a brisk wind I'm reloading more frequently and if it is not as cold I'm adding less frequently . . . one thing is for sure . . . I know the reloading time is in hours . . . not minutes . . . I would cook myself out of the house and have a huge pile of coals if I was reloading every 45 minutes . . . or at the very least would not be burning very efficiently.