Fan sound effects

Filmoscope: cooling fan, no slide change

2872 886

Hospital, fan running, air outlet

3519 993

Ventilation in the passenger compartment

3439 1128

Working ventilator in a hospital

2669 710

Medical ventilator

4523 1720

Wind generator: ventilation

3218 682

Dehumidifier turns on

4522 1313

Air conditioner is working

4519 1323

Air conditioner

139 4

Wind farm

139 4