Glass doors are an extremely helpful accessory to any fireplace. Glass doors seal the fireplace and decrease air intake for a fireplace. This effectively make the fireplace a closed combustion system, a system in which air intake is from only one place. This makes your fireplace more energy efficient by slowing the burn rate of your wood.
Glass doors also help make your fireplace safer for you and your family by blocking the emission of potentially harmful gases into your home. They can also help prevent serious burns, especially of small children. Glass doors give you the practical and aesthetic appeal that you want without the normal risk of having a fire in the home!