Natural draft opening

{
  "id": "MLC-T-ENV-018244",
  "term": "Natural draft opening",
  "field": "Environment",
  "term_source": "Natural Draft Opening",
  "definition": "1. Any opening in a room, building, or total enclosure that remains open during operation of the facility and that is not connected to a duct in which a fan is installed. The rate and direction of the natural draft across such an opening is a consequence of the difference in pressures on either side of the wall containing the opening.\n\n2. Any opening in a room, building, or total enclosure that remains open during operation of the facility and that is not connected to a duct in which a fan is installed. The rate and direction of the natural draft across such an opening is a consequence of the difference in pressures on either side of the wall or barrier containing the opening.",
  "subject": "Built environments",
  "references": [
    "40 CFR 60.711 (CFR 2013); 40 CFR 63.702 (CFR 2013); 40 CFR 63.742 (CFR 2013)",
    "40 CFR 60.741 (CFR 2013)"
  ],
  "url": "https://mlchart.com/terminology/environment/natural-draft-opening/"
}