Engineered to optimize indoor air exchange and reduce energy waste in residential buildings with intelligent electrical control features.

• 1 fresh air inlet temperature sensor
• 1 supply air outlet temperature sensor
• 1 return air temperature sensor

• 1 external humidity sensor
• 1 external CO2 sensor
• 1 external differential pressure switch
• 1 WiFi module

• 2 external electric heaters

• 2 RS485 communication ports: 1 for centralized control to external system, 1 for communication between master and slave boards
• 4 digital inputs reserved: Fire alarm signal input, bypass control switch, forced start switch, differential pressure signal input, forced high-speed signal input
• 4 digital outputs reserved: Operation status signal output, fault signal output, electric heater 1 output, electric heater 2 output

• Heat Exchange Mode: Energy from exhaust air can be extracted to heat (in winter) or cool (in summer) the fresh air, reducing energy consumption
• Speed Adjustment: 5 adjustable speeds (positions 1, 3, 5, 7, 10) for supply air and exhaust air outlets, adjustable independently
• Operation Timer: Unit can operate intermittently for 15min, 30min, or 45min per hour; continuous operation also possible
• Power-off Memory: Unit retains its operating status prior to power outage upon restart
• Frost Protection: Unit enters frost protection mode when outdoor temperature is too low

• Allows free adjustment of fan speeds for supply and exhaust air at each speed level

• Ultra-Low Temperature Operation: Can operate normally (intermittently) even below 5°F (-15°C)
• Temperature Calibration: Displays and calibrates 3 air temperatures (fresh air, return air, supply air); all 3 temperatures used in intelligent control
• Advanced Sleep Mode: Operates at lowest speed during specific periods, intelligently opens or closes bypass based on indoor-outdoor temperature difference to reduce air conditioning energy consumption
• Intelligent Airflow Compensation: Intelligently compensates airflow after prolonged operation without replacing or cleaning filters or the core

• Cloud Control: Remote control via Tuya Cloud platform mobile APP (WiFi module required)
• Forced Dehumidification: Set desired indoor humidity for intelligent operation (humidity sensor required)
• CO2 Forced Ventilation: Intelligent operation based on preset CO2 control logic (CO2 sensor required)
• Differential Pressure Filter Alert: Intelligent operation and alerts based on core and filter differential pressure (differential pressure switch required, must be installed at factory)
• Multiple Signal Interfaces: RS485 interface, bypass control switch signal, differential pressure signal, forced start/stop signal, fire alarm signal, forced high-speed input signal, fault signal, operation signal, and electric heating signal

• Heat Exchange Mode: Energy from exhaust air can be extracted to heat (in winter) or cool (in summer) the fresh air, reducing energy consumption
• Speed Adjustment: One-touch high speed for supply/exhaust air and one-touch exit from high speed mode
• Operation Timer: One-touch high speed duration: 10/20/30 minutes
• Power-off Memory: Unit retains its operating status prior to power outage upon restart
• Frost Protection: Unit enters frost protection mode when outdoor temperature is too low

• Ultra-Low Temperature Operation: Unit can operate normally (intermittently) even below 5°F (-15°C)

• Multiple Signal Interfaces: RS485 interface, bypass control switch signal, differential pressure signal, forced start/stop signal, fire alarm signal, forced high-speed input signal, fault signal, operation signal, and electric heating signal