Bionaire 914 Humidifier Foam Pre-filter

$17.96 – subscription plans available

$8.98/each (2-pack)

This Bionaire foam replacement pre-filter fits several Bionaire units. Compatible model numbers are listed below. This filter has approximate dimensions of 9″ x 9-1/4″ x 1-3/4″ and should be replaced every three (3) months.

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This is the correct pre-filter for the following Bionaire models:

  • C22, C33
  • W2, W2S
  • W6, W6S
  • W7
  • W9, W9H, W9S
  • W25
  • W0210, W0210S
  • W0305
  • W0310
  • W0340
  • W3040
  • WC0840

Dry air provides better conditions for bacteria and germs to live, breed, and spread. You can minimize the spread of germs and increase your indoor comfort during the winter season by adding moisture to your air with a humidifier. Ideal humidity levels are 30-40%.

Additional information

Item Number

Model Numbers

Case Size

Filter Features

Equipment Protection
Lint/Heavy Dust Protection
Mold Spores Protection
Settling/Average Dust Protection
Dust Mites Protection
Pollen Protection
Dander Protection
Suspended/Fine Dust Protection
Auto Emissions Protection
Smoke Particles Protection
Bacteria Protection
Sub-Pollen Particles Protection
Attached Viruses Protection
Pollution Protection


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