Fan sound effects

Filmoscope: cooling fan, no slide change

2997 887

Hospital, fan running, air outlet

3617 993

Ventilation in the passenger compartment

3542 1129

Working ventilator in a hospital

2869 712

Medical ventilator

4650 1722

Wind generator: ventilation

3313 683

Dehumidifier turns on

4638 1315

Air conditioner is working

4638 1325

Air conditioner

238 4

Wind farm

261 5