We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Five white foam filters for four inch fans

HOFFMAN

HOFFMAN AFLTR4 Filter for 4 in Fans Pack of 5

SKU CH-BCXN-T4305

Foam filter pack of five fits 4-inch fans to protect enclosures from dust ingress

  • TypeEnclosures
  • Foam filter protects 4 in fans from dust
  • Pack of five filters covers multiple fan installations
  • NVENT HOFFMAN brand ensures reliable enclosure accessories
  • Free shipping on orders of 75 or more
  • Direct shipment from Zoro speeds delivery to your door

HOFFMAN AFLTR4 Fan Filter Pack

The HOFFMAN AFLTR4 pack contains five foam filters designed to fit four-inch fans inside electrical enclosures. Each filter helps block dust and debris from entering sensitive equipment. The pack is sold new and ready for immediate installation in compatible enclosures.

Suited for enclosure maintenance teams

These filters suit technicians who service electrical cabinets fitted with four-inch cooling fans and need a ready supply of replacements. Buyers who require filters for other fan sizes, different mounting styles, or non-foam media should look at other product lines.

Foam filter media for four-inch fans

The defining specification is the foam filter media cut for four-inch fan openings, supplied in a pack of five. This single detail determines whether the kit matches the ventilation cut-outs in your enclosure.

Highlights

  • Foam filter protects 4 in fans from dust
  • Pack of five filters covers multiple fan installations
  • NVENT HOFFMAN brand ensures reliable enclosure accessories
  • Free shipping on orders of 75 or more
  • Direct shipment from Zoro speeds delivery to your door

Specifications

BrandHOFFMAN
TypeEnclosures

Questions about this item

How quickly does the foam material clog under continuous airflow?

The foam filter traps dust and particles during sustained fan operation, extending the interval between cleaning or replacement.

Does the foam filter add noticeable airflow restriction or fan noise during all-day use?

The open-cell foam is designed for low resistance so the 4-inch fan maintains its rated airflow with minimal added noise.

What size fan must already be installed for these filters to fit?

These filters are made for 4-inch square fan openings and mount directly over the fan guard.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.