How To Clean a Box Fan

Updated: Jun. 23, 2023

Portable, affordable box fans move serious air — and collect serious dirt. Here's how to get yours looking like new.

Next Project
Time

1 - 2 hours

Complexity

Beginner

Cost

$5

Introduction

A box fan and an open window — there's nothing better to move stale, stuffy air. However, all that action means box fans pick up all kinds of grime and dust.

Luckily, cleaning them is a breeze. If yours is only a little dusty, a vacuum and a damp cloth might take care of things. But for serious grime, dunk the grilles (but never the electronics!) in soapy water and give them a scrub.

Tools Required

  • Screwdriver
  • Sponge or dishcloth
  • Towels
  • Tub or sink
  • Vacuum cleaner with brush attachment (or whisk broom)

Materials Required

  • Dish soap

Project step-by-step (7)

Step 1

Unplug

  • Unplug the fan from the wall.

unplug fanAlly Childress for Family Handyman

Step 2

Remove grille(s) and blades

  • If the front and back grilles are removable, detach with a screwdriver.
  • Place the screws where you won’t lose them.
  • Remove blades if possible; check the owner’s manual for instructions.

remove fan gratesAlly Childress for Family Handyman

Step 3

Vacuum

  • Vacuum dust and dirt from housing and grilles.
  • Use the brush attachment or whisk broom to loosen buildup.

vacuum fanAlly Childress for Family Handyman

Step 4

Soak grilles and blades

  • Fill the tub with soapy warm water.
  • Soak grilles and blades while you clean the rest of the fan.

soak fanAlly Childress for Family Handyman

Step 5

Wipe down components

  • Dunk sponge or cloth in soapy water and wring out well.
  • Wipe down the interior of fan housing.
    • Do not get water in the electronics.
  • Wipe down the cord.

wipe fanAlly Childress for Family Handyman

Step 6

Scrub grilles

  • Wash grilles and blades in the soapy water.
  • Rinse well.

Fan Scrub GratesAlly Childress for Family Handyman

Step 7

Dry

  • Lay grilles and blades on towels to dry.
  • Be sure they’ve dried thoroughly before reassembling.

clean box fanAlly Childress for Family Handyman