... air system2×3KW double-intake centrifugal fans for intake air, model YDW4.5M1, air capacity for each fan: 10500m3/h.Exhaust air system ... air, 5.5KW double intake centrifugal fan for exhaust air, model YDW-4.5S, air capacity is 15500 m3/h, with manual ... damper for exhaust air.Heating SystemRIELLO G10 oil burner ...