Devil505 wrote:I'm going to try this experiment the first cool night when I just want a small, cooler fire: I'm going to just fill my firebox up about 1/3rd of the normal height.
Devil505, that’s what I did for a few years. In the mornings, I eventually tried filling on an angle; low to just cover the grates on one side and all the way to the top on the opposite side. This would yield a full width fire area in the morning and as the fire climbed thru the pile, the burn width gets smaller as the day gets warmer. Ash keeps the grates covered so little draft is lost as the day warms. At night I'd place a few small shovels atop the burn and rake out the fire to cover the bottom after it got going. It works best for me when it’s in the 40s at night and 50s during the day. If I tried this in warmer weather, I'd loose the draft when I shook and had a nearly impossible time keeping a small fire.
Since I reduced the fire box with the brick, the fire is so small that it's good for the nights in the 50s and days in mid 60s. I plan on pulling the bricks from one side as the weather cools, then all of them as it gets even cooler. At that point, I'll do the angled fill procedure again until it stays in the 40s and then it's filler' up time again