1.The unit adopts a high-strength cage type heavy-duty frame, the box can withstand pressure difference between the inside and outside 4500Pa, with high strength, good sealing, no cold bridge and so on;

2.Integral wrapped type windward bypass valve and streamlined double-blade split structure reduce equipment volume and have low flow resistance;

3.Rear-bend-type voluteless fan features by small size, light weight, and low noise;

4.The efficient copper tube copper fin heat exchanger is adopted and the tube plate flanged-hole is equipped with copper guard ring to reduce local wear and extend the service life.