Bonnet Style Air Filters
Protect equipment motors, workers and products from harmful dust and contaminants with bonnet style equipment protection air filters. Available for use on circular fan guards, ventilation exhausts or air intake openings to prevent possible contamination from dust, dirt, thread, lint and fibers. These fan filters contain 1 layer of washable electrostatic polypropylene media is custom sewn with elastic cloth binding to fit over any sized fan guard grill or forced air ventilation opening. Approximately 1/8" thick, bonnet can be made in any size diameter. Black polypropylene media is UV protected and can be used for outdoor applications. White media is FDA approved for food processing applications and works well to meet AIB Food Safety audit and inspection dust collection & filtering device requirements. Additional media (non-woven polyester or foam) can be added to the filter configurations to increase arrestance efficiencies. Pull tabs and drawstrings can be added for easy access or velcro closures for wrap around style filter. 4 styles are available:
- BONNET - Circular Fan Guards
- FANGUARD - Protects Backside of Fan Air Intake
- VENTCAP - Square or Rectangular Wall Vents
- SOCK - Drop Down Ceiling Vents
Product model name
Model![]() | BONNET | FANGUARD | VENTCAP | SOCK |
|---|---|---|---|---|
Material frame is made of
Frame![]() | Elastic Edge | Elastic Edge | Elastic Edge | Elastic Edge |
Filtering material used
Media![]() | Black or White Polypropylene | Black or White Polypropylene | Black or White Polypropylene | Black or White Polypropylene |
Thickness filter is available in
Filter Thickness![]() | 1/8" | 1/8" | 1/8" | 1/8" |
Percentage of dust captured by filter under test conditions
Average Arrestance Efficiency![]() | 42% | 42% | 42% | 42% |
Clean filter resistance to air flow
Initial Resistance![]() | 0.02" w.g. | 0.02" w.g. | 0.02" w.g. | 0.02" w.g. |
Dust captured before reaching end of test pressure
Dust Holding Capacity![]() | 67 grams | 67 grams | 67 grams | 67 grams |
Underwriters Laboratory flammability designation
U.L. Classification![]() | As to Flammability Only | As to Flammability Only | As to Flammability Only | As to Flammability Only |
Length of time product is warrantied
Warranty![]() | 5 Years | 5 Years | 5 Years | 5 Years |






