FAQ

Take the larger of two values: the minimum fresh air volume per person and the air-change-based requirement. Reference figures from the ROTER product manual are general office 30 m³/h per person; high-grade office 30–50 m³/h per person; residence or villa 30–50 m³/h per person; shopping mall 15–25 m³/h per person. For air-change rate: general rooms 1–2 ACH; computer rooms 2–4 ACH; smoking-intensive meeting rooms 3–8 ACH. Large shopping malls can alternatively set fresh air volume at 30% of the central air conditioning total supply air volume. For industrial workshops where harmful substances are released, size the airflow to dilute the pollutants to safe concentrations.

See also: How to Calculate Fresh Air Volume · ERV Sizing Guide 2026 · Single-Flow Fresh Air Ventilator