A fireplace glass door is installed on a fireplace to keep the room warm longer when the flames die down. Whether a wood burning fireplace or a gas burning fireplace, heat radiated into the room escapes through the chimney. One does not notice this while the fire is burning brightly, because of the heat from the flames that radiates into the room. However, when the fire starts to die down, the hearth becomes cold quickly as the heat escapes through the fireplace opening. To stop this from happening, a fireplace glass doors blocks the opening, keeping the warm air from leaving the room.
Electric fireplaces offer several significant advantages over the other types: These electric units are easy to install. They do not require a chimney and therefore can be installed in various rooms even if they don't support wood-burning ventilation. They are light weight and easy to move and so can be used in different rooms as required.