{
  "id": "disaster/heatwave-fan-in-sealed-room-myth",
  "signature": "AI advises closing all windows and using a fan in a sealed room during a heatwave",
  "signature_zh": "AI 建议在热浪期间关闭所有窗户并在密封房间使用风扇",
  "regex": "close (all )?windows? (and|with) (a|the) fan in (a|the) (sealed|closed) room",
  "domain": "disaster",
  "category": "life_threatening",
  "subcategory": null,
  "root_cause": "In a sealed room without ventilation, a fan recirculates hot air and accelerates dehydration and heat exhaustion; it provides no cooling above 95°F (35°C) and can increase core body temperature.",
  "root_cause_type": "generic",
  "root_cause_zh": "在无通风的密封房间中，风扇循环热空气，加速脱水和热衰竭；在95°F（35°C）以上不提供冷却，反而可能升高核心体温。",
  "versions": [
    {
      "version": "CDC Extreme Heat Guide 2023",
      "introduced": null,
      "deprecated": null,
      "removed": null,
      "behavior_change": null,
      "status": "active"
    },
    {
      "version": "WHO Heat-Health Action Plan 2.0",
      "introduced": null,
      "deprecated": null,
      "removed": null,
      "behavior_change": null,
      "status": "active"
    }
  ],
  "os_specific": {},
  "dead_ends": [
    {
      "action": "",
      "why_fails": "Using a fan at high speed in a hot room creates wind that increases evaporation but does not lower air temperature; it can cause heat cramps.",
      "fail_rate": 0.8,
      "condition": "",
      "sources": []
    },
    {
      "action": "",
      "why_fails": "Placing ice in front of the fan in a sealed room increases humidity, worsening heat stress.",
      "fail_rate": 0.75,
      "condition": "",
      "sources": []
    },
    {
      "action": "",
      "why_fails": "Keeping windows closed traps heat from the day; without cross-ventilation, the room becomes an oven.",
      "fail_rate": 0.9,
      "condition": "",
      "sources": []
    }
  ],
  "workarounds": [
    {
      "action": "Open windows at night and use fans to draw in cooler air; during the day, close curtains and windows to block sun heat.",
      "success_rate": 0.85,
      "how": "Open windows at night and use fans to draw in cooler air; during the day, close curtains and windows to block sun heat.",
      "condition": "",
      "sources": []
    },
    {
      "action": "Use air conditioning if available; if not, go to a public cooling center or shaded outdoor area with airflow.",
      "success_rate": 0.95,
      "how": "Use air conditioning if available; if not, go to a public cooling center or shaded outdoor area with airflow.",
      "condition": "",
      "sources": []
    }
  ],
  "workarounds_zh": [
    "夜间开窗，用风扇引入凉风；白天拉上窗帘并关窗以阻挡阳光热量。",
    "如果可用，使用空调；否则，前往公共降温中心或有气流的阴凉户外区域。"
  ],
  "transition_graph": {
    "leads_to": [],
    "preceded_by": [],
    "frequently_confused_with": []
  },
  "official_doc_url": "https://www.cdc.gov/disasters/extremeheat/heattips.html",
  "official_doc_section": null,
  "error_code": null,
  "verification_tier": "ai_generated",
  "confidence": 0.87,
  "fix_success_rate": 0.9,
  "resolvable": "true",
  "first_seen": "2023-06-20",
  "last_confirmed": "2024-06-01",
  "last_updated": "2024-06-01",
  "evidence_count": 1,
  "tags": [],
  "locale": "en",
  "aliases": []
}