They require a chimney liner for venting much like a traditional wood burning fireplace.
B vent fireplace inserts.
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Unlike direct vent gas inserts natural vent b vent gas fireplace inserts are not sealed to the room.
Not all models require an electrical outlet but always check to make sure you have one if it is needed.
Because hot flue gases are buoyant the exhaust air moves naturally through.
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B vent gas fireplaces also known as natural vent fireplaces or as a b vent fireplace use air from inside your home to fuel combustion and rely on the buoyancy of hot gases to vent exhaust through dedicated pipe systems.
Combustion fumes are vented outside.
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B vent gas fireplaces draw interior air from the area around your fireplace to help fuel combustion inside the appliance.
They also use room air for combustion but the amount of air they use is minimal.
M35800045 get the fireplace you want without the extra heat.