Research Article
Design and Development of a Low-Cost, Portable Monitoring Device for Indoor Environment Quality
Table 5
IEQ index scoring system.
| IEQ parameter | “Good” | “Average” | “Poor” | “Bad” |
| Humidity | 40–50% | 50–60% | 60–70% | 70 > H > 40% | Temperature | 20–24°C | 16–20°C | 24–26°C | 26 > T > 16°C | PM2.5 | 0–10 μg/m3 | 10–15 μg/m3 | 15–35 μg/m3 | >35 μg/m3 | PM10 | 0–50 μg/m3 | 50–80 μg/m3 | 80–150 μg/m3 | >150 μg/m3 | Total VOC | 0–200 ppb | 200–350 ppb | 350–500 ppb | >500 ppb | CO2 | 350–500 ppm | 500–1000 ppm | 1000–5000 ppm | >5000 ppm | CO | 0–3 ppm | 3–8 ppm | 8–10 ppm | >10 ppm | Indoor air quality | 0–10 ppm | 10–25 ppm | 25–50 ppm | >50 ppm | Illuminance | 300–500 lux | 200–300 lux | 100–200 lux | <100 lux | Sound levels | 0–40 dB | 40–70 dB | 70–80 dB | >80 dB | Scoring impact | 0 | 0.2 | 0.5 | 1.0 |
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