PTC units for DIN bar application. FEH/FFH heaters, installed separately from cooling units, must be connected to FTMC thermostat. When used to provent cabinet condensate they should be electrically connected, also when cabinet is off. In large cabinets it's better to install more heating elements with small heating power to have optimal air temperature distribution.
Series FEH/FFH heaters, series FTH fan heaters.