Table 2.
The results of measuring indoor environmental parameters in the two offices
| Parameter | Office No.1 (n=68) | Office No.2 (n=102) | Exposure limits | P-value | ||
|---|---|---|---|---|---|---|
| Range | μ±σ | Range | μ±σ | |||
| Lighting (lux) | 189–815 | 402±135 | 102–740 | 301±140 | 300–600 | <0.001 |
| Air velocity (m/s) | 0.45–0.7 | 0.52±0.049 | 0.09–0.35 | 0.17±0.01 | 0.05–0.2 | <0.001 |
| Temperature (°C) | 19–26.3 | 23±1.3 | 20–26.7 | 23±2.4 | 20–24 | >0.90 |
| Relative humidity (%) | 45–75 | 51±4.51 | 25–66 | 53.9±5.19 | 40–60 | <0.001 |
| CO2 concentration (ppm) | 389–1160 | 701±163 | 501–1060 | 741±124 | 450–675 | 0.088 |
| Noise level (dBA) | 23–59 | 40±5.5 | 37–51 | 42.73±2.93 | 40–45 | <0.001 |