One common method for venting an electric kiln is through a direct vent system that actively pulls air from the kiln.
Understanding Direct Venting for Kilns
Direct venting utilizes mechanical assistance, specifically a fan or blower, to manage the atmosphere inside the kiln and remove fumes. This method ensures efficient and controlled airflow during the firing process.
How the Direct Vent System Works
According to the provided reference, a direct vent system operates by:
- Using a fan or blower to pull air.
- Pulling air from both the surrounding room and directly from within the kiln itself.
- This is achieved by connecting an exhaust fan to the kiln using a duct and a fitting that mounts over one or more very small holes in the kiln wall or, more often, the kiln floor.
This setup creates negative pressure within the kiln or draws air directly through the vent holes, pulling out moisture, organic binders, and other fumes produced during firing.
Key Components of a Direct Vent System
A direct vent system typically includes:
- Exhaust Fan/Blower: The motor that creates the suction to pull air.
- Ducting: Flexible or rigid pipe that connects the fan to the kiln fitting and directs exhaust outside.
- Kiln Fitting: A fixture that mounts onto the kiln wall or floor, sealing around the small vent holes to connect to the duct.
- Small Vent Holes: Strategically placed holes in the kiln structure (usually the floor) where fumes are extracted.
Component Functionality Summary:
| Component | Primary Function |
|---|---|
| Exhaust Fan | Generates suction to pull air and fumes. |
| Ducting | Conveys the extracted air and fumes away from the kiln. |
| Kiln Fitting | Provides a sealed connection point between the kiln and duct. |
| Small Vent Holes | Entry points within the kiln for fume extraction. |
This system effectively captures and removes potentially hazardous fumes directly from the kiln chamber, exhausting them safely outside the building.
