Double skin panel with thermo- isolation of PU foam : 20 mm thick foam panel features light     weight,good rigidity and low thermo conductivity.

New type sealing material : Air leakage is minimized by the new type sealing material combined     with specially designed aluminium alloy frame.

Bottom drain piping : All the condensates from the water pan are drained completely though     bottom drain piping.

External coils drainage valve : the external drainage valve is equipped at the lowest point of colis     for complete drainage and guarding against freezing.

Airfoil damper : Gear driven airfoil can be opened and closed freely,and electric acutator can be     implemented if necessary

Unit fundament: each section is equipped with a fundamental for strength improvement ,making     transportation and assembly easier.