The process
Large sheds shed heat through the ridge with roof extractors and draw fresh air through louvers or supply fans. Evaporative cooling is added where the process heat is high.
The gas
Ambient air carrying light dust from the surroundings, enough to settle on blades over months but not to erode them. Inlet screens and a wheel that sheds deposit are the usual precautions.
Fans in this process
| Duty | What it does here | Type usually selected |
|---|---|---|
| Roof Extractor | An axial fan in a weatherproof cowl mounted on an inclined or flat roof, exhausting hot air from the ridge of a factory shed.. | Axial |
| Ventilation Fan | Moves air through a plant or building for fresh air supply, heat removal and fume dilution where the system is ducted. | Backward inclined and forward curved |
| HVAC | Supply, return and exhaust fans for heating, ventilation and air conditioning of plant and office space. | Axial, backward inclined and forward curved |
Air pollution control
Industries
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