Passive System Activation
Pre-existing Passive Radon Reduction Systems are built into many newer homes at the time of construction. Most often, they are constructed by using a perforated pipe installed beneath where the foundation will be poured. The pipe is then routed to a solid pipe that goes up through the middle of the home, and usually out the roof. They are designed to use heat and pressure differentials to move air from beneath the home and vent the air up and out of the home. If additional suction is needed for the system to be effective at lowering radon levels, a fan is installed to make the system "active". Activation includes installation and wiring of a fan into the existing passive system, sealing cracks and seams in the foundation, a pressure manometer, and also includes a post-activation canister test kit to ensure the system is effectively lowering radon levels.