The Fresh Air Vent allows the air conditioner to recirculateinsideair,drawfreshairintotheroom and exhaust stale air to the outside .

12.Electrostatic Filter (not all models) Being constructed of high efficiency purifying substance, active carbon fabric, electrostatic fabric, electrostaticactivecarbonnetandothermaterials itpurifiestheaireffectively.Itswavystructure increases the capability to filter dust and smoke effectively.Duetotheretentionoftheactivecarbon it has a high purifying speed capable of strong airflow.

Page 9
Image 9
Haier HWR18VC5 manual