| Fresh air intake
- Cooling tower
- Exhaust system
- Sanitary vent
- Carbon monoxide
|
- Snow and rain
- Storage area
- Organic matter
- Stagnant water
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Return ductwork plenum
- Dust accumulation
- Debris accumulation
- Excessive humidity
|
- Condensation
- Water infiltration
|
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Mixing plenum and filtration unit
- Wet filter
- Excessive dust accumulation
- Inadequate filtration
|
- Inadequate insulation
- Water infiltration
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Blower and coil section
- Wet filter
- Excessive dust accumulation
- Inadequate insulation
|
- Water infiltration
- Water carry-over
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Sound attenuator and supply ductwork
- Dust accumulation
- Debris accumulation
- Excessive humidity
|
- Condensation
- Water infiltration
|
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Diffusers and vav and mixing box
- Dust accumulation
- Humidity
- Condensation
|
- Water infiltration
- Inadequate insulation
|
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