Source capture of pollutants using localized exhaust hoods is an economical and a cost-effective means to control plant air quality. Source capture or collection of a dust at its source minimizes the amount of air that needs to be cleaned as well as the amount of make-up air required and the cost of control.
Carefully designed hoods are available as standard “off the shelf” designs or they can be custom designed to maximize capture of particulate and fume. An important resource for design help is the “Industrial Ventilation – A Manual of Recommended Practice for Design” manual published by American Conference of Governmental Industrial Hygienists. The manual shows a plethora of specific hood designs with dimensional data, CFM, static pressure and position variables to be considered. The manual is our starting point for all our custom hood fabrications.
Advantages of Custom Exhaust Hoods
- Moveable or fixed, requiring minimal amount of space
- Custom designed to maximize collection efficiency at a point source
- Fit any process
- Can be added to an existing central dust collection system
- Isolate pollutant points within a plant
- Constructed of carbon steel, stainless steel, FRP or PVC
Disadvantages of Fixed Hoods
- If the hood is not positioned close to the source it will not pick-up dust effectively and probably not be used
- Man coolers and cross drafts may move air away from the hood inlet and destroy effectiveness of source capture
Applications for Hoods
- Work stations
- Weigh stations
- Bins
- Hoppers
- Mixers
- Tools
- Furnaces
- Laboratory hoods
- Open surface tanks
- Weld stations
Typical Exhaust Hood Designs Available
- Barrel and Bag Filling
- Sampling Box
- Foundry Shakeout
- Laboratory
- Oven Exhaust
- Lathe
- Melting Furnace
- Pouring Station
