It was time for an upgrade. My sister gave me this old insert when she moved into her home about 8 years ago. I'm not sure what kind it is, but I had replaced the mica with glass and added a new blower. I was able to heat my home with it but could never really get any long burn times. But it was a definite improvement over an open fireplace. I think the tag said it was from the mid 1970's as I recall. Unfortunately, the back developed 3 cracks and the metal was very thin. Probably from overfiring. I'm sure somebody here knows the manufacturer.
Here it was on it's last day.
Here it was on it's last day.