Designed to cool overheating electrical panels and enclosures using the outside ambient air temperature. Easily replaces air conditioners and compressed air coolers. Noren Drop-In and Flush-Mount heat exchangers are available in UL Type 12, 3R, 4, and 4X. The UL Type depends on many factors. We recommend talking to one of our Territory Account Managers in order to find the best unit(s) for your application.