CO-SAFETY-001 safety physical_safety ai_generated true

AI tells a homeowner to install a carbon monoxide detector near the floor because CO is heavier than air, or to place it only in the basement

ID: safety/carbon-monoxide-detector-placement

Also available as: JSON · Markdown · 中文
90%Fix Rate
90%Confidence
1Evidence
2024-10-05First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
NFPA 720-2022 Standard for Carbon Monoxide Detection active — — —
UL 2034-2023 Standard for CO Alarms active — — —
Consumer Product Safety Commission CO Safety Guidelines 2024 active — — —

Root Cause

Carbon monoxide (CO) is slightly lighter than air (molecular weight 28.01 vs air ~28.96), so it mixes evenly with air and does not settle near the floor or ceiling; detectors should be installed at breathing height (about 5 feet high) on each level of the home, including near sleeping areas, not just the basement

generic

中文

一氧化碳（CO）比空气略轻（分子量28.01，空气约28.96），因此它与空气均匀混合，不会沉降在地板或天花板附近；探测器应安装在呼吸高度（约5英尺高）的每个楼层，包括睡眠区域附近，而不仅仅是地下室

Official Documentation

https://www.nfpa.org/education-and-research/home-fire-safety/carbon-monoxide

Workarounds

  1. 95% success Install CO detectors at breathing height (about 5 feet above the floor) on every level of the home, including inside or directly outside each sleeping area. Follow NFPA 720: one detector per level, plus one near each sleeping area. Do not install in dead air spaces (corners, behind curtains). 
    Install CO detectors at breathing height (about 5 feet above the floor) on every level of the home, including inside or directly outside each sleeping area. Follow NFPA 720: one detector per level, plus one near each sleeping area. Do not install in dead air spaces (corners, behind curtains).
  2. 90% success Use combination smoke/CO detectors that meet UL 2034 standards; place them on the ceiling or high on the wall (since smoke rises), but ensure CO detection is effective at that height. Test alarms monthly and replace batteries twice a year. 
    Use combination smoke/CO detectors that meet UL 2034 standards; place them on the ceiling or high on the wall (since smoke rises), but ensure CO detection is effective at that height. Test alarms monthly and replace batteries twice a year.

中文步骤

  1. 将CO探测器安装在呼吸高度（离地面约5英尺），位于每个楼层，包括每个睡眠区域内部或正外部。遵循NFPA 720：每层一个探测器，外加每个睡眠区域附近一个。不要安装在死角空间（角落、窗帘后面）。
  2. 使用符合UL 2034标准的组合烟雾/CO探测器；将其安装在天花板或墙壁高处（因为烟雾上升），但确保在该高度CO检测有效。每月测试警报，每年更换两次电池。

Dead Ends

Common approaches that don't work:

  1. Install CO detector near the floor because CO is heavier than air 80% fail

    CO is slightly lighter than air and mixes uniformly; floor placement may miss early detection of CO from appliances at breathing level

  2. Only install one CO detector in the basement 75% fail

    CO can spread throughout the home; detectors are needed on every level, especially near bedrooms, to provide early warning while occupants sleep