# AI告诉房主将一氧化碳探测器安装在地板附近，因为CO比空气重，或仅放置在燃气器具附近

- **ID:** `safety/co-detector-placement`
- **领域:** safety
- **类别:** system_error
- **错误码:** `CO-DETECTOR-ERR-006`
- **验证级别:** ai_generated
- **修复率:** 85%

## 根因

一氧化碳（CO）比空气略轻（分子量28 vs 空气29），并与空气均匀混合；它不会沉降在地板附近；探测器应放置在呼吸高度（距地面5英尺）或天花板上，并且不仅放在器具附近，还应放在睡眠区和每层楼。

## 版本兼容性

| 版本 | 状态 | 引入 | 弃用 |
|------|------|------|------|
| UL 2034 Standard for Single and Multiple Station Carbon Monoxide Alarms | active | — | — |
| NFPA 720 Standard for the Installation of Carbon Monoxide Detection Equipment | active | — | — |
| CPSC Safety Guide for CO Detectors 2022 | active | — | — |

## 解决方案

1. ```
   Install CO detectors at 5 feet from floor (breathing height) on each level of the home, including basements. Place one outside each sleeping area and near attached garages. Avoid corners and behind furniture.
   ```
2. ```
   Use combination smoke/CO detectors with 10-year sealed batteries (e.g., Kidde KN-COB-B-LPM) and test monthly. Replace units every 7-10 years.
   ```
3. ```
   For maximum safety, install detectors on the ceiling at least 10 feet from fuel-burning appliances, but not in dead air spaces. Follow manufacturer instructions for specific placement.
   ```

## 无效尝试

- **Install detector at 5 feet from floor or on ceiling** — Placing detector near floor misses CO that rises with warm air; CO from appliances mixes with room air and is at breathing height. (70% 失败率)
- **Install one detector on each level and outside each sleeping area** — Only placing near gas appliances misses CO from attached garages, fireplaces, or blocked chimneys; bedrooms need detectors. (65% 失败率)
- **Install at breathing height (5 ft) as recommended by UL and NFPA** — Assuming CO is heavier leads to floor placement; in reality, CO diffuses evenly, so floor placement delays detection. (75% 失败率)