Intelligent Control System Design v humane air quality automatic detection function with integrated air quality sensor to detect when the composite indicator of indoor air exceeds a set value, the system automatically run faster, automatically slow down after the return to normal, to maintain the best energy-saving mode v LCD control total running time filter replacement indicator based on the actual total running time, timed reminder to change the filter differential pressure alarm function v ERU / ERU-L can be equipped with front and rear sections can be configured to filter differential pressure sensor, when the filter is clogged pressure exceeds a set value feedback to the control system automatically alerts remind replacement, to facilitate the timely replacement of filters to ensure the normal operation of the new air system v LCD control with automatic defrost feature hosts indoor and outdoor temperature sensing probe, can switch to indoor and outdoor temperature display, when will automatically start when the outdoor temperature is below the set value the defrost mode, there is an optional accessory duct heater v personalization feature set different operating modes can be timed according to their own habits, to achieve different times of day L / M / H position Automatic switching to sleep mode settings ultra-quiet low-speed operation, the operating mode to achieve the best humane and environmentally friendly energy-saving effect of the new fire-retardant material inside the high security configuration using Huntsman v polymer environmentally friendly materials, high strength and good sound-absorbing effect, to Building retardant B1 level, demonstrated complete security v shell to use environmentally friendly galvanized sheet, the surface of Akzo Nobel (Netherlands) epoxy powder coating, corrosion and enhance the appearance of fine grade P2 v-proof membrane capacitance, high level of operational safety long v Germany EBM external rotor motor, 2 speed air volume high pressure, high resistance to the air supply system is running provides a strong guarantee. ERU-L model with optional EBM motor v motor maintenance-free self-lubricating bearings, comes with thermal protection, transformer governor strong guarantee L / M / H switch smoothly third gear, the best safety performance standards v pluggable connection cable line connection security easy and efficient total heat recovery core