By Joe Musso – UL Standards Program Manager Click here for Standards information. Register here for “What’s New” to receive e-mails twice a month that let you know about the new published UL Standards, Outlines, and Proposals. UL 325 – Door, Drapery, Gate, Louver, and Window Operators UL 325 remains active with a number of… read more
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By Brian Rodgers – UL Principal Engineer & Dean Saputa – Associate member ASHRAE Since the 1990s, ultraviolet germicidal irradiation (UVGI), or light in the UV-C wavelength (specifically 253.7 nm), has been used in HVAC&R equipment to maintain or return cooling capacity to as-built conditions by maximizing heat exchange efficiency. The technology deactivates biological growth… read more
By Stephen R. Kuscsik – UL Principal Engineer Perimeter security is a concept that many facilities use to deter unauthorized access to a protected premises. Automatic gates and door operators allow for the convenience of opening gated portals to enter the facilities. Electronic Access Control Systems ensure that only authorized and credentialed users can gain… read more