Cost-effective products Ripple fin titanium air exchanger 5~8% more efficient than standard heat exchangers No welding points reduce gas leakage risk by 30% High/Low pressure protection available Clock & Timing on/off function Water proof display and keyboard for operation Dual fan speed-low noise and horizontal air out Defrosting: The unit defrosts the evaporator when the ventilator is activated Wide ambient working temperature -5â~53â CE approval