I can't seem to find what I'm looking for. What is the part or material that's used for the...insulation? that's behind the firebrick in my stove? It's a rectangle the same size as the center firebrick with a hole cut out for the auger tube, and it is maybe 1.5-2.0" thick and white.
Regency Greenfire GF55.
Regency Greenfire GF55.