• Aug 31, 2025 example for staircase pressurization calculation te: Q_infiltration = ACH × V / 3600 Where ACH is the number of air changes per hour (here, 0.3 ACH): Q_infiltration = 0.3 × 300 m³ / 3600 s ≈ 0.025 m³/s This is the baseline airflow needed to account for leakage. Step 4: Adjust for Pressure Dif BY Elmo Kohler
