What is UL1439:2018?

UL1439:2018, also known as the Standard for Single and Multiple Station Smoke Alarms, is a technical specification developed by Underwriters Laboratories (UL). It provides guidelines and requirements for the design, performance, and testing of smoke alarms used in residential and commercial buildings.

Scope and Purpose

The scope of UL1439:2018 covers both single and multiple station smoke alarms designed to detect the presence of smoke and provide an audible alert. The purpose of the standard is to ensure that these devices meet established safety standards and offer reliable smoke detection capabilities.

Design and Performance Requirements

UL1439:2018 outlines various design and performance requirements for smoke alarms. This includes specifications for the sensor used to detect smoke, the loudness of the alarm signal, the ability to differentiate between different types of smoke, and compliance with environmental conditions such as temperature and humidity.

Testing and Certification

In order to obtain UL certification, smoke alarms must undergo rigorous testing according to the requirements stated in UL1439:2018. These tests evaluate factors such as smoke sensitivity, false alarm rate, endurance, and resistance to interference from external sources. Products that pass the tests are certified and can bear the UL mark, indicating that they comply with safety and performance standards.