Despite adding aesthetic value to any fireplace, glass doors (also called glass enclosures) also have several functional uses as well. First off, glass doors prevent heat from being lost up your chimney. By closing your glass doors, you will drastically reduce the amount of room heat that is usually lost through the draft from your chimney when the fireplace is in use. Next, the mesh screens that come with most model glass enclosures provide protection from sparks that can occur when burning a wood fire. Finally, in some cases, glass doors also minimize the heat lost up your chimney when the fireplace is not being used.
Behr Necessites offers fine doors from Thermo-Rite of Akron, Ohio.