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Radon

• •Radon is everywhere, see map
• •Naturally-occurring radioactive gas - causes lung cancer
• •Inert, colorless and odorless
• •Naturally in the atmosphere in trace amounts
  • •Outdoors: radon disperses rapidly
• •Most radon exposure occurs inside homes, schools and workplaces
  • •Indoors: Radon gas becomes trapped indoors after it enters buildings through cracks and other holes in the foundation
  • •Can be controlled and managed with proven, cost-effective techniques

Radon monitoring

Hardware

• •Airthings Wave
  • •Continuous radon monitoring
  • •Long term monitoring
  • •LEDs color – radon level
  • •Battery Operated
  • •Bluetooth BLE
• •ESP32 - lolin D32 (can use any ESP32)
• •MQTT Server - Mosquitto

Software

• •Python script to read values from Airthings Wave: Wave-Reader
• •Home Assistant Custom Component: sensor.airthings_wave
• •ESP32 code to read Airthings BLE/Send MQTT: Airthings MQTT

Radon Mitigation

Since April 2020, we have observed high levels of radon (>2 pCi/L) which has prompted us to mitigate radon in the air we breathe in the house. This is in spite of having a passive radon mitigation system installed in the house when built.

1. •Seal the concrete basement
   • •Gray 1-part epoxy/vapor barrier
2. •Seal cracks and voids
   • •Gray 100% Silicone caulk
3. •Add radon mitigation system
   • •Radon Fan
   • •3-prong appliance electrical cord
   • •3’ rubber couplers
   • •Manometer

Results

Well below action limit of 2 pCi/L