Sub-membrane depressurization

{
  "id": "MLC-T-ENV-027108",
  "term": "Sub-membrane depressurization",
  "field": "Environment",
  "term_source": "Sub-Membrane Depressurization",
  "definition": "1. A system designed to achieve lower sub-membrane air pressure relative to crawlspace air pressure by use of a vent drawing air from beneath the soil-gas retarder membrane. May be a passive system (without fan) or active system (with fan).\n\n2. System designed to achieve lower sub-membrane air pressure relative to crawlspace air pressure by use of a vent drawing air from beneath the soil-gas retarder membrane. May be a passive system (without fan) or active system (with fan).",
  "subject": "Air",
  "references": [
    "RRNC Glossary of Terms"
  ],
  "url": "https://mlchart.com/terminology/environment/sub-membrane-depressurization/"
}