Enclosure Heaters - SK Series Snap-fastening onto 35 mm support rails EN 50 022 or direct screw-fastening onto the mounting plate PTC technology with Computational Fluid Dynamics assisted design for superior heating performance Requires external Thermostat and or Hygrostat to regulate heating in the enclosure Fan assisted heat flow on models 200W and above DIN Rail Mount Enclosure Heaters Heaters specifically intended for anti-condensation and frost protection in control and equipment cabinets. All types are supplied with DIN rail mounting hardware.