1 Outside Building Ventilation Units
2 Outside Air Unit 2
3 Office Shredder
4 Large Industrial Air Conditioners
5 Outside Refrigerator Unit
6 Old Oscillating Fan on High
7 Old Oscillating Fan on Low
8 Small Oscillating Fan on High
9 Home Air Filterer Unit
10 Car Air Conditioners
11 Box Fan
12 Elevator Fans
13 Rumbling Fan
14 Industrial fan
15 Office Air Conditioners
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