ACH Calculator ISO14644_4

ACH Calculator — ISO 14644-1

ACH Calculator

ISO 14644-1 Cleanroom Standard

Engineered for precision

Room dimensions

Length

Width

Height

Units metres feet inches

ISO 14644-1 class

Overrides — leave blank to use calculated / ISO recommended values

Volume override (m³) For irregular rooms

Airflow override (m³/h) ACH calculated from this

ACH override Airflow calculated from this

Results

Cubic metres per hour m³/h

Litres per second L/s

ACH by ISO class

ACH ranges per ISO 14644-1. Classes 1–4 use velocity-based criteria; ACH values shown are practical equivalents. Always confirm with a qualified cleanroom engineer.

Enquiry Form