Electric fireplaces are easy to maintain and do not require lots of cleaning. They don't produce ash and waste and are relatively maintenance free. Smoke and ash can also be hazardous to the health therefore these electric units are very favorable in houses with old people and small children.
Most fireplace glass doors are made of tempered glass with either ceramic or anodized aluminum frames. Glass is placed on the door so that the fire can still be appreciated even with the door closed. Most of these fireplace doors can be bought stock - meaning that most of the door that are for sale can be purchased off the rack and installed with minimal changes.