| Partial water pressure (PWP; hPa) (Wexler equation) |
| (6.1117675 + 0.4439 × T + 0.014305 × T + 0.000265 × T + 0.00000302 × T + 0.0000000204 × T + 0.00000000006388 × T) × RH ÷ 100; T, Temperature of chamber (°C), RH, relative humidity of chamber (%) |
| Volume mixing ratio (VMR; %) |
| 100 × PWP ÷ Air pressure; Air pressure = 1,004.74 hPa |
| Dry gas ventilation rate (Dry Gas VR; L/min) |
| Wet VR × ((100 - VMR) ÷ 100); Wet ventilation rate (Wet VR) = 900 L/min |
| Dry Standard temperature and pressure ventilation rate (Dry STP VR; L/min) |
| (Air pressure × Dry gas VR) ÷ (T + K) × K ÷ 1 atm; 1 atm = 1,013.25 hPa, K = 273.15 |
| Methane emission (L/min) |
| (Dry STP VR × (methane (ppm) ÷ 1000000)) ÷ Gas recovery rate |