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Heaters
In order to choose the most suitable heating element,
please refer to the Technical section on page 340.
HEATING ELEMENT WI271 WI273 WI274 HEATING ELEMENT
PTC (semiconductor).
PROTECTION RATING
IP44.
PROTECTION CLASS
I (protection wire to earth).
HEATING ELEMENT
WI250 WI255 WI260 WI265 WI270 HEATING ELEMENT PTC (semiconductor). PROTECTION RATING IP20. PROTECTION CLASS I (protection wire to earth). Note: supply does not include the cable.  HEATING ELEMENT WI277 WI279 TECHNICAL FEATURES
Air flow: 45 m3/h (50 Hz) and/or 54 m3/h (60 Hz).
Surface temperature: Max 75°C.
Time capacity: 50.000 hours to 25°C.
PROTECTION RATING
IP20.
PROTECTION CLASS
I (protection wire to earth).
HEATER WITH FAN
AND THERMOSTAT WIRV HEATER PTC (semiconductor). TEMPERATURE ADJUSTMENT 0-60°. PROTECTION RATING IP20. PROTECTION CLASS I (double insulation). 
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