Select all that apply.

• A

  Isolating hot and cold air, avoiding the confusion of hot and cold air and improving the utilization of cold air.

• B

  It can increase the air supply temperature of the air conditioner, thus reducing the energy consumption of the air conditioner.

• C

  The closed heat channel can increase the return air temperature and improve the cooling efficiency.

• D

  Reduce the humidification power consumption by increasing the supply air temperature and reducing the power consumption of humidification.