About Air Filter Efficiency Ratings
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Curb-Style Storm Drain Filters
Prevent rainwater from carrying trash, debris, and sediment into sewers. These filters are often used on construction sites. They mount inside curb openings, keeping them out of the way of vehicles.
In addition to solids, 22"-35" filters remove oil and fuels from storm water. Two tension rods hold the filters in place.
Scouring Pads
Scrub away heavy grease and grime with these pads.
Contoured pads are rounded to fit comfortably in your palm, with pointed ends to scrub corners. An antimicrobial treatment keeps bacteria from growing on these pads.
Pkg. | ||||||||
|---|---|---|---|---|---|---|---|---|
| Abrasion Type | Lg. | Wd. | Ht. | Choose a Color | Pkg. Qty. | 1-5 | 6-Up | |
Non-Contoured Shape | ||||||||
Synthetic Fiber | ||||||||
| Light | 9" | 6" | 3/8" | 20 | 0000000 | 000000 | 000000 | |
| Light | 9" | 6" | 3/8" | White | 10 | 000000 | 0000 | 0000 |
| Medium | 9" | 6" | 1/4" | Green | 10 | 0000000 | 0000 | 0000 |
| Medium | 9" | 6" | 3/8" | Red | 20 | 0000000 | 00000 | 00000 |
| Heavy | 5" | 3 1/2" | 1" | Blue | 20 | 0000000 | 00000 | 00000 |
| Heavy | 9" | 6" | 3/8" | Green | 10 | 0000000 | 00000 | 00000 |
Contoured Shape | ||||||||
Synthetic Fiber | ||||||||
| Medium | 7" | 4 1/4" | 3/8" | Blue | 20 | 0000000 | 00000 | 00000 |
Prefilter Air Filter Pads
These pads are an economical choice for protecting more expensive filters that catch finer particles. Cut to the size you need; frames are sold separately.
Pads meet UL standards for flame retardance.
Synthetic fiber pads have a heavy dust-holding capacity and withstand poor weather conditions such as rain, snow, and wind. Often used in upstream HVAC applications, they’re durable and can catch dirt, dust, hair, and other large particles. The material of these pads is also known as hog hair.
Pkg. of 25 | |||||||
|---|---|---|---|---|---|---|---|
| HVAC Filter Trade Size | MERV Filter Rating  | Filter Efficiency @ 3 Microns | Removes Particle Size Down To, microns | Color | Max. Temp., °F | Pkg. | |
1" Thick | |||||||
| 12 × 24 | 3 | 20% | 3 | Blue | 180° | 00000000 | 0000000 |
| 16 × 20 | 3 | 20% | 3 | Blue | 180° | 00000000 | 000000 |
| 20 × 20 | 3 | 20% | 3 | Blue | 180° | 00000000 | 000000 |
| 20 × 25 | 3 | 20% | 3 | Blue | 180° | 00000000 | 000000 |
| 20 × 30 | 3 | 20% | 3 | Blue | 180° | 00000000 | 000000 |
| 24 × 24 | 3 | 20% | 3 | Blue | 180° | 00000000 | 000000 |