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What is a direct-vent fireplace?

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Direct vent is a term used to describe a specifically designed fireplace that performs differently from the traditionally vented fireplace which use a chimney. This type of fireplace has a completely sealed combustion chamber which allows it to vent directly out a side wall of the home. One of the benefits of this type of design is that it must draw air necessary for combustion from the outside since the sealed combustion chamber does not allow air to be drawn in from around the fireplace. The co-axial vent system has the exhaust pipe within the air intake pipe which protects any surrounding combustible material from the high temperature of the flue gases as well as preheating the outside air prior to it being introduced to the combustion process. more
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A Direct Vent Fireplace is a gas log fireplace (propane or natural gas) that has a flue at the top or back of the fireplace that vents directly out side. Fresh air is brought in through a pipe surrounding the exhaust flue so that no air is required from inside the home to sustain the fire. Unlike Vent-less Fireplaces, all the combustion gases are vented outside. The Direct Vent Fireplace has a glass plate that seals off the firebox from the room. Below and above the firebox are vents that allow cool air to enter at the bottom and exit as hot air at the top. The Quiet Fireplace Fan gently improves the flow of air around the firebox and launches warm air out into the room and prevents heating the mantle. For owners of older Direct Vent Fireplaces please read this. more
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While a traditional fireplace provides an open burning chamber that vents through a chimney, a direct vent fireplace does not require a chimney, and can vent horizontally out a sidewall or vertically to the roof. The direct vent fireplace also has a completely enclosed chamber that is highly efficient, drawing in air for combustion from the outside and expelling gasses to the outside as well. The front glass enclosure is porous, allowing radiant heat to pass into the room. The direct vent fireplace heats a room without robbing it of oxygen or of the heated air it is providing, while also keeping it free of fumes and combustible materials such as embers or ash. A direct vent fireplace can be a wonderful choice for rooms in which a traditional fireplace is not practical or possible. Aside from providing clean warmth and the cheery glow of real fire, a direct vent fireplace saves space by allowing furniture to be positioned directly to either side with "zero clearance." This simply ... more
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A direct vent fireplace gets 100% of its combustion air from outside. It does not take warm air and oxygen out of your house or allow cold air and creosote smell into your house like a traditional wood burning fireplace. more
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Direct vents are high efficiency, sealed gas fireplace systems. Fresh air is pulled from the exterior of the house via the flue and burned within the confines of the combustion chamber. By products of combustion are isolated from the home as they exit to the outside. These fireplaces can be vented horizontally (to an outside wall) or vertically (at the roof) and will minimize heat loss through the chimney--yielding an average 70% efficiency through dry convection and radiant heat. A sealed Lexington Forge direct vent fireplace systems will not spill or back draft byproducts of combustion into the living space and are approved for bedrooms or baths.
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A. Direct vent is a term used to describe a specifically designed fireplace that performs differently from the traditionally vented fireplace which use a chimney. This type of fireplace has a completely sealed combustion chamber which allows it to vent directly out a side wall of the home. One of the benefits of this type of design is that it must draw air necessary for combustion from the outside since the sealed combustion chamber does not allow air to be drawn in from around the fireplace. The co-axial vent system has the exhaust pipe within the air intake pipe which protects any surrounding combustible material from the high temperature of the flue gases as well as preheating the outside air prior to it being introduced to the combustion process. Q. more
fireplacecenter.com
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A direct vent fireplace or fireplace insert is one that is has its exhaust vented outside through a vent tube that is connected to a chimney or wall. Direct vent gas fireplaces are the currently the most popular choice used because of their many advantages. The most efficient and safe of all gas fireplace options, direct vent fireplaces work using a vent tube through an outdoor wall in your home. One tube exhausts the fumes from the fireplace out of your home, and in sealed combustion models, brings combustion air from outside the house as well - allowing maximum efficiency and safety because the air within the home is left completely undisturbed. This option virtually eliminates heat loss, and causing no drafts. On top of that, they are tested to operate at approximately 90% efficiency. If you are looking for an extremely efficient type of gas fireplace, a direct vent fireplace will work very well and keep the air in your home undisturbed. Make sure you have the ability to install ... more
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A direct-vent fireplace is a sealed combustion appliance where air is drawn from outside and all smoke and vapor is vented directly outside. more
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Direct Vent - an appliance that draws combustion air from outdoors and exhausts it's combustion products to the outdoors eliminating the need for a standard chimney system. A glass panel in direct vent units is critical to keeping the combustion system sealed from the home, maintaining high efficiency and indoor air quality. Remote Ready: Remote Ready Direct Vent Fireplaces allow you to turn your fireplace on from the convenience of a wall switch, thermostat or hand held remote control. The Flame height adjustment still must be done from the valve on the fireplace, not from the remote device. In the event of a power outage you can still operate your remote ready fireplace. Electric Ignition: Electronic Ignition Direct Vent Fireplaces allow you to operate your fireplace without having a standing pilot system. This style fireplace will save you money not using a pilot system, but will not operate in the event of a power outage. Variable Flame Height: Variable Flame Height Direct Vent ... more
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All gas fireplaces need a constant supply of fresh air in order to operate. Direct Vent fireplaces have a sealed, glass-fronted combustion chamber that keeps the byproducts of combustion out of the living space. Air is drawn into the firebox from outside the home using a special co-axial flue pipe system. This 'pipe within a pipe' also exhausts the flue products outside the home. Direct vent fireplaces offer good efficiency because they don't steal heated air from the living space.
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