... flow passages, sensible heat exchanger.2. Fresh air filtersTriple filtration to ensure air cleanness, G4+F7+H10.Aluminum frame, solid ... . Bypass systemBy adjusting the opening angle, different fresh air volume can go through theheat exchanger and by-pass ... refrigerant, environment friendly. 6. EvaporatorPlate fin heat exchanger, with coated hydrophilic fins. 7. Connection boxCircuit board, core of ...