Air Changes per Hour

Views Updated: Dec 15, 2025

Key Facts

Abbreviation
ACH
Pronunciation
/ɛr ˈʧeɪnʤɪz pər aʊər/
Category
Academic & Science
Related Field
Architecture

Examples in Context

  1. With approval, airflow may set back to6 air changes per hour when space is unoccupied.
  2. If pollutant removal must be carried out by dilution with fresh air only, the ventilation rate must be a couple of air changes per hour to have a significant effect.
  3. There shall be10 air changes per hour of ventilation in wet laboratories and8 air changes per hour of ventilation in dry laboratories.

Other meanings of ACH

AcetylCHoline Medical
AdrenoCortical Hormone Medical
ACCS Common Hardware Gov
Automated Clearing House Business
Acoli Regional
Acute Care Hospital Medical
Account Clearing House Business
Absorption Chiller Heater Business
Automatic Clearing House Business
Advanced Combat Helmet Gov