Up, up, and away!
The radon mitigation system taps into our existing drain tile, which runs around the inside perimeter of the foundation. The continually running fan draws the air up from the drain tile. To access the drain tile, a hole needs to be drilled into the basement floor. A pipe is run up through the house and out through the roof.
Drain Tile Access Hole
Radon Vent Pipe
One of our faithful readers asked how we know if the radon mitigation fan is working. The pipe in the basement has a guage on it that shows the pressure (relative to the room). See how the left side is higher than the right? That means there is a lower pressure in the pipe. The fan is working. (Aside: It reminds me of a big mercury barometer I used to have in my classroom. If the administration knew it was there it would have been removed, since it required a large vat of mercury.)
Pressure Guage