{
  "schema": "vedokrok.public-item.v1",
  "release_id": "MHC-RPUB-20260920-75ad787a",
  "url": "/knowledge/use-co2-trends-to-test-ventilation-changes-in-the-room-you-actually-work-in",
  "id": "MHC-D-RESEARCH-0891",
  "version": "0.1.0",
  "title": "Use CO2 trends to test ventilation changes in the room you actually work in",
  "summary": "The trend after the change is often more useful than arguing about one isolated number.",
  "kind": "template",
  "body": "A consumer CO2 monitor can support a bounded ventilation experiment: observe the occupied-room baseline, change window/door/ventilation conditions safely, then watch whether the trajectory changes. Record occupancy because people themselves are a major indoor CO2 source.",
  "limits": [
    "Do not open windows when outdoor air, weather, security or noise makes that unsafe; CO2 does not measure every pollutant."
  ],
  "topics": [
    "union-digital-home-office-environment"
  ],
  "intents": [],
  "source_ids": [
    "RS-864E546A7D0D437F"
  ],
  "evidence": [
    {
      "claim": "ASHRAE supports meaningful indoor CO2 monitoring when measurements are interpreted in the context of occupancy, ventilation and the built environment.",
      "source_id": "RS-864E546A7D0D437F",
      "role": "supports",
      "note": "Do not open windows when outdoor air, weather, security or noise makes that unsafe; CO2 does not measure every pollutant.",
      "locator": "See source record"
    }
  ],
  "use_when": [
    "The room feels stuffy and you want a simple way to see whether an airflow change has an effect."
  ],
  "avoid_when": [
    "Do not open windows when outdoor air, weather, security or noise makes that unsafe; CO2 does not measure every pollutant."
  ],
  "example": "Compare a closed-door work block with the same room after opening the door and enabling mechanical ventilation.",
  "check": "The monitor is used to learn how the room ventilates under real occupancy rather than to chase a universal magic number.",
  "template": "Occupants: [count]. Baseline CO2 trend: [trend]. Ventilation change: [change]. New trend: [trend after]. Comfort/other constraints: [notes].",
  "sources": [
    {
      "id": "RS-864E546A7D0D437F",
      "title": "ASHRAE Position Document on Indoor Carbon Dioxide",
      "url": "https://www.ashrae.org/file%20library/about/position%20documents/pd-on-indoor-carbon-dioxide-english.pdf"
    }
  ],
  "relations": [],
  "collections": [
    {
      "id": "RC-112961CC8EF10888",
      "title": "Make the environment carry more of the focus load",
      "url": "/collections/make-the-environment-carry-more-of-the-focus-load"
    }
  ]
}