What is the .7 rule for smoke detectors?
Matter Heiman Smoke Sensor
Question ID: 6696382 Status:
Open Jan 18, 2026 - 12:12 AM
1answer
Answer
Jan 18, 2026 - 12:12 AM
The ".7 rule" for smoke detectors refers to the guideline that smoke detectors should be placed so that no point in a room is more than 0.7 times the listed spacing distance from a detector. This ensures adequate coverage, as smoke may not travel directly to a detector, especially in larger or oddly shaped rooms. For example, if the listed spacing is 30 feet, detectors should be within 21 feet (0.7 × 30) of any point in the room.
View More Product Details
Matter Heiman Smoke Sensor
Long-Lasting Fire Safety with Smart, Low-Power Smoke Detection The HEIMAN Mini Smoke Detector is a reliable safety and security solution for your home.Designed with ultra-low power consumption technology, it ensures long-term stability and dependable performance. Powered by a CR123A lithium battery,...
See More
View all Matter Heiman Smoke Sensor Questions & Answers
Add New Comment