1:07
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Domestic furnace running with a hush
0:12
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Domestic furnace exhaust nearby 3
0:48
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Domestic furnace exhaust off
0:32
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Industrial heater on run and turn off
0:11
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Domestic furnace exhaust nearby 2
5:16
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Domestic furnace on run and off
0:24
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Domestic furnace exhaust nearby 1
1:00
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Hvac vent run
1:00
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Hvac vent run with a metal rattle
0:08
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Elevator interior, fan running steadily, thick.