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- $44.99TVOC Air Quality Monitor, Requires Hub, Pollution Meter for TVOC, Temperature and HumidityThe Home Depot
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- $64.83Multifunctional Air Quality Tester CO2 TVOC Meter Temperature Humidity Measuring DeviceNewegg
- $99.64Digital Air Quality Monitor 5 in. 1 Multi-Functional CO2 DetectorThe Home Depot