Design and Development of a Low-Cost, Portable Monitoring Device for Indoor Environment Quality

Table 3

IEQ index with parameters.

IEQ parameter	Ambient levels	Health risk levels
Humidity	40–70%	70 > H > 40%
Temperature	16–24°C	24 > T > 16°C
PM2.5	<35 μg/m^3	>35 μg/m^3
PM10	<150 μg/m^3	>150 μg/m^3
Total VOC	50–325 ppb	>500 ppb
CO2	350–1000 ppm	>5000 ppm
CO	0–10 ppm	>10 ppm
Illuminance	200–500 lux	<100 lux
Sound levels	0–70 dB	>80 dB