Which condition is NOT part of the installation rules for fire devices?

The correct answer identifies an installation condition that typically violates manufacturer guidelines for fire devices. Fire alarm and detection equipment must be installed in environments that are conducive to their optimal performance. This typically involves maintaining ambient temperatures within a specified range, generally above freezing and below a certain maximum temperature.

Installing fire devices in conditions below 40°F or above 100°F can adversely affect their functionality. At temperatures that are too low, components can be less responsive or even freeze, while excessively high temperatures can lead to equipment failure or incorrect readings. Manufacturers often provide specific temperature ranges for proper operation, and adherence to these recommendations is crucial for ensuring reliable fire safety measures.

In contrast, the other conditions mentioned—ambient conditions meeting manufacturers' recommendations, appropriate distances from cooking appliances, and careful consideration of proximity to heating or cooling registers—are all critical in ensuring the effectiveness of fire alarm systems. These conditions help minimize false alarms and ensure that devices can operate properly in real-world scenarios.