... 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 ... coated galvanized steel, collecting the drain water from heat exchanger, evaporator and condenser.10. Drain pump Integrated with ball cock to ...