... Technical parametersConfigeuration 1. Crossflow heat exchanger -Made of Aluminum, cross flow passages, sensible heat exchanger.2. Fresh ... filtration to ensure air cleanness, G4+F7+H10.Aluminum frame, solid, stable, ametabolic and anti corrosive. 3. Return ... air filterNonwoven material, G4 class, filtering return air.Aluminum frame, solid, stable, ametabolic and anti corrosive. 4. Bypass ...