You probably had one of the more original stoves that are much higher quality castings and fitment. The cheap us stove company ones really are very badI heated my insulated garage for several years with an older version of that stove that I suspect was actually made in USA. Worked great.
I found it easy to control the fire in fact easier than my EPA stove of today. It certainly was a simple stove although a smoker when I choked it down. Never felt it would burn down my garage due to it's controllable nature.