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What is the difference between a Direct Vent and a B-Vent option for gas fireplaces and stoves?
With a direct vent, the air required to burn the unit is pulled through a termination located outside the home and into a sealed firebox and sends flue gases back out of the home through the inside portion of the vent. B-vent takes air from within the home and gravity vents the flue product back up and out of the pipe to the outside. B-vent is only available on certain units and is only appropriate in certain settings, be sure to ask your fireplace professional which is right for your home.