Direct Vent Fireplace
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Basics
- A Fireplace which uses Air from outside for Combustion Air and exhausts it outside
- While vertical chimneys exist, the more common/ideal version vents horizontally through a wall, and uses Countercurrent Heat Exchange with the hot exhaust air heating up the (cold) intake air, this improving efficiency
- The lack of reliance on Negative Pressure (via the Stack Effect in a conventional Fireplace+Chimney, or most Fireplace Inserts also integrates well with houses running at a Positive Pressure Ventilation mode (Such is best practice for most modern, well sealed Passivhaus type designs where the main “leak” is through intentional Roof Penetrations / Building Envelope Penetrations such as a Energy Recovery Ventilator or Heat Recovery Ventilator (rather than through Drafts under Doors/Window Frames etc)