Smoke detectors installed within ____ feet of a cooktop or range must be of the ____ type.

In the context of smoke detector installation, it is essential to consider the proximity of smoke detectors to cooking appliances, such as cooktops or ranges, to avoid nuisance alarms. Smoke detectors located within 20 feet of a cooktop or range should be of the photoelectric type.

Photoelectric smoke detectors are specifically designed to reduce false alarms triggered by cooking smoke or steam, making them ideal for areas close to cooking appliances. They use a light source and a light-sensitive sensor; when smoke enters the detection chamber, it scatters the light, triggering the alarm. This design helps minimize unwanted activations that are common with ionization smoke detectors, which are more sensitive to flaming fires but can be more prone to false alarms from cooking activities.

By adhering to this guideline, you maintain safety while ensuring that the smoke detectors function effectively without being overly sensitive to common kitchen activities, thereby promoting a safer living environment.