Characteristics:

1. The unit is built in with two cooling sources which have different evaporation temperatures. Firstly, the high-temperature cooling source precools and dehumidifies the fresh air through the primary high-temperature cooling coil to bear the heat and humidity loads of fresh air, and then the low-temperature cooling source further cools and dehumidifies the fresh air through the secondary low-temperature cooling coil to bear all the indoor humidity loads.

2. High-temperature cooling sources are intensively set by high-temperature cooling water units (the supply water temperature is generally 14-16ºC), and the low-temperature cooling sources are usually intensively set by conventional cooling water units (7/12ºC or lower cooling sources), or dispersedly set by fresh air unit-equipped independent cooling sources;

3. According to different modes of low-temperature cooling sources of fresh air handing unit, the fresh air handing unit can be divided into air-cooled, water-cooled, cooling-water, total heat recovery double-cold-source dehumidification fresh air handing units;

4. After dehumidifying the constant temperature and humidity unit, the unit shall be reheated and supplied air, or to prevent low-temperature fresh air with air dehumidified from moisture condensation at air supply outlet, the fresh air shall be reheated by condensing heat, which can supply the air within appropriate temperature range (16-21ºC) into the room again;

5. Simple structure, high operation reliability, and small unit size;

6、 风量：2000~180000m3/h.