Sealed Combustion Gas Fireplace. Direct vent fireplaces are efficient and safe alternatives to traditional gas and wood burning fireplaces. Gas fireplaces come in three types:
When the fire is off, we feel an obvious draft of the cold air when the fireplace is on, the air around the combustion chamber heats up, creating a natural upward movement of warm air behind the fireplace, which pulls room air into the bottom. Flues and chimneys can be sealed to prevent drafts after converting. Ventless fireplaces fueled by gas or propane rely on indoor air for combustion, and they exhaust a low level a large, open space, such as a great room, should handle a ventless gas/propane fireplace with a 25,000 btu or higher output, akin to the heat output from a sealed and vented gas fireplace. A direct vent gas fireplace or insert is the best hearth choice when it come to protecting the air inside your home that your family and friends will breathe.
Sealed combustion direct vent gas fireplaces are an acceptable alternative.
It's time to move on to a cleaner and greener fireplace with better venting and heating efficiency. Direct vent appliances utilize a sealed combustion chamber that ensures they do not consume any oxygen from the room. Most gas fireplaces take advantage of sealed combustion. That means almost every one of the methane molecules combines with two molecules of oxygen, producing one molecule of carbon dioxide, two molecules of water vapor, and some heat.
