DANBURY, Connecticut, United States, 13 June 2021: Belimo said its damper actuators and most of the valve actuators and sensors meet UL 2043 requirements. The National Electrical Code Section 300.22 (c), in the United States, requires electrical devices in plenums to be tested to UL 2043 for low smoke generation. Underwriters Laboratories’ UL 2043 is the standard for fire test for heat and visible smoke release for discrete products installed in air-handling spaces, Belimo said, adding that its products, used for installation in air-handling spaces, meet UL 2043 standard for heat and smoke release. By complying with the UL 2043 requirements, Belimo said, its products have demonstrated the following characteristics:

• A peak rate of heat release of 100 kW or less
• A peak normalized optical density of 0.50 or less
• An average normalized optical density of 0.15 or less