The schematic below illustrates frost protection on incoming air, air filtration, main heating and cooling coils and intended and true states of the fans. There are also hidden popup text boxes as shown by the blue box white text 'Frost Alarm' over the frost coil. Also illustrated is a recuperation unit for efficient energy reclaim. The pages are completely configurable to the clients needs and when applied to the TREND 962/3 Lite version is easily reconfigurable even by your engineers on site.