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