How far must smoke alarms be installed from a door to a bathroom containing a shower or tub?

Smoke alarms must be installed at least 36 inches away from a door to a bathroom containing a shower or tub. This requirement is in place to minimize the chances of false alarms that can occur due to steam and humidity that typically arise from showers and baths. Smoke alarms are designed to respond to smoke particles, and steam can sometimes mimic these particles, leading to unnecessary alarms. Therefore, placing smoke alarms at a distance of 36 inches helps ensure their accuracy and reliability in detecting actual fire conditions while reducing the likelihood of nuisance alarms caused by bathroom activities.