If your radon levels cross a defined threshold it will turn off your WeMo Smart Plug. And if your fan or radon mitigation system is connected to the WeMo Smart Plug it will stop the fan when the radon levels drop below the defined threshold.

This trigger fires when radon level of a device falls below the provided threshold.

This Action will turn a WeMo Switch off. If the WeMo Switch is already off, it will remain off.

Switch off WeMo Smart Plug to turn off a fan if Radon levels are low