Air changes per hour

{
  "id": "MLC-T-ENV-000830",
  "term": "Air changes per hour",
  "field": "Environment",
  "term_source": "Air Changes per Hour",
  "definition": "1. The movement of a volume of air in a given period of time; if a house has one air change per hour, it means that the air in the house will be replaced in a one-hour period.\n\n2. The amount of air in a building that leaks out or is removed by a fan and is replaced by outdoor air. Usually listed as a fraction of one air change per hour, such as .35 ACH.\n\n3. Volume of air moved in one hour. One air change per hour in a room, home, or building means that all the air in that environment will be replaced in one hour.",
  "abbreviation": "ACH",
  "subject": "Air",
  "references": [
    "Terms of Environment",
    "Indoor Air Quality Glossary",
    "I-BEAM Glossary of Terms"
  ],
  "url": "https://mlchart.com/terminology/environment/air-changes-per-hour/"
}