Electric duct heaters EKA...NV PTC are designed to
heat clean air in ventilation systems and react to air flow in the duct. Air
flow through the heater can't be less than 1,5 m/s. If there is an air flow in
the duct, PTC sensor gives a signal, which allows to begin heating, depending on
heating value set on the heater. If there is no air flow through the heater,
heating is blocked (regardless from heating need).
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