You pull the console humidifier out of the closet in September. You prepare the machine for the long cold months. You fill the water tank and turn the power on. The airflow feels much weaker than it did last winter. The bemis humidifier filter inside the unit is a full year old. A clogged filter slows the air through the cabinet. Less air through the cabinet means less moisture reaches the room. You need a clean cartridge to restore normal operation.

Water Filters FAST stocks the exact replacement part right now. Water Filters FAST lists the Bemis 1051 humidifier filter at $30.99 today. The fresh part prepares your home for the dry heating season.

Written by the Water Filters FAST filter experts. Reviewed by Phil McNamara, owner, Water Filters FAST. Updated September 2026.

What the Bemis 1051 air cleaning cartridge does

The Bemis 1051 operates as a two-stage air cleaning filter. This original replacement cartridge fits inside your console humidifier. It measures approximately 18 inches long. It measures 10 1/2 inches wide. The cartridge is about one inch thick. It weighs 0.89 pounds. The manufacturer states that this cartridge helps your humidifier achieve its operational output. A clean cartridge lets the fan pull air easily.

The listing rates the cartridge for an average life of one year. This cartridge sits among standard humidifier filters as an air cleaning unit. The listing calls it a wick filter replacement in its first line and an air cleaning filter in its specifications. Use the listing's words: it is the console's two-stage air cleaning filter. The dual stages capture distinct types of household debris.

How the electrostatic media removes airborne particles

The first stage of this cartridge features high efficiency filter media. This media carries an electrostatic charge. The electrostatic charge catches small particles in the air stream. The moving air brings household debris into the cabinet. The electrostatic material captures this debris on contact.

The cartridge removes dust and pollen. It captures smoke particles and other airborne contaminants. Clean air then passes through to the next stage.

How the activated carbon stage removes household odors

The second stage of the cartridge uses activated carbon media. The activated carbon stage targets smells in the room air. The carbon removes odors from cooking and pets. It captures odors from smoke.

The two stages work together inside the single cartridge frame. One frame drops into the console and both stages go to work.

Check your console to find the correct match

You need to match your console model number to this part. You can perform this physical check in about ten seconds. Turn the humidifier cabinet around. Look for a printed manufacturer label on the back panel. Check the underside of the cabinet if the back is blank. Open the fill door and check the interior walls.

Read the model number printed on this sticker. The number might begin with a 4 or a 6. It might display 4D7 or 800. It might list ED11 or H12. The Bemis 1051 fits all of these specific series families. The label on the old part overrules any table. Trust the printed text on your existing cartridge.

Compare console series and model numbers

The manufacturer lists exact model matches for this air cleaning filter. The bemis 400 series filter family includes the 426-300 and the 426-700 units. It covers the 427-300 and the 436-300 models. The cartridge fits the 447-301 and the 447-401 consoles. It matches the 496-800 and the 497-300 machines. The list includes the 497-800 model.

The 400 series also features many four digit codes. The cartridge fits the 4029 and the 4161 models. It fits the 4261 and the 4262 consoles. The part fits the 4273 and the 4363 units. It matches the 4968 and the 4371 machines. It fits the 4971 and the 4973 consoles. The 1051 fits all other unlisted 400 series humidifiers.

The bemis 600 series filter includes the 696-100 and the 696-400 models. It covers the 697-400 and the 697-500 consoles. The cartridge fits the 6974 machine. The part matches all other 600 series units. You can view other replacement accessories in the Bemis collection online.

The h12 humidifier filter supports a dedicated line of consoles. This line includes the H12-001 and the H12-300 units. It fits the H12-400 and the H12-600 models. The cartridge fits all other H12 series machines. The ed11 humidifier filter matches the ED11-800 and the ED11-910 units. It fits all other ED11 consoles on the market.

The part fits the 4D7-300 and the 4D7-800 models. It fits the entire 800 series family. It fits the standalone 1500 model. If your model is not on this list, call before ordering.

The name change to the Essick Air brand

You might see different brand names on this exact part. Bemis sold their Home Comfort Division to Essick Air Products. This division sale included all humidifiers and air purifiers. Essick Air now sells the line under the Bemis by Essick Air brand name.

The cardboard box might display the Bemis 1051 name. The box might display the Essick Air 1051 name. These names indicate the same physical cartridge. Both boxes contain the identical two-stage air cleaning filter for your console.

Steps to change your air cleaning cartridge

The swap needs no special tools on most consoles. Your console manual shows which panel opens to the filter.

1. Unplug the console from the electrical wall outlet before you begin.
2. Open the filter door on the humidifier cabinet to expose the old media.
3. Note how the old cartridge sits in the housing before you pull it out.
4. Lift out the old cartridge and throw it away in the regular household trash.
5. Seat the new 1051 cartridge in the same orientation inside the housing.
6. Close the panel tightly to secure the new component in the cabinet.
7. Write the current month on the cardboard frame with a dark marker.
8. Plan the next change for one year out from today.

Signs you need a replacement cartridge before one year

The manufacturer rates this air cleaning filter for an average life of one year. Some homes need a replacement cartridge sooner than twelve months. A long heating season forces the console to run continuously every day. This heavy use pushes more air through the electrostatic media.

Pets in the room add excess hair and heavy dander to the air stream. The cartridge traps this physical debris and fills up faster than usual. A visible gray coat on the media indicates a full cartridge. A furnace filter in the air filters collection goes gray the same way at the end of winter.

The MERV 11 furnace filter post covers the same particles at the furnace. Replace the cartridge if you see a solid gray layer. The cartridge itself shows you the correct answer about replacement timing. Do not wait for the one year mark if the material turns gray.

Common questions about the Bemis 1051 humidifier filter

Does the Bemis 1051 fit the 400 series?

The cartridge fits the entire Bemis 400 series family of console humidifiers. You will find your specific model number printed on the back panel or underside of the unit. The 1051 cartridge works in the 426-300 and the 497-800 models. It fits all other 400 series machines.

Does it fit ED11 and H12 consoles?

The manufacturer rates this exact replacement cartridge for all ED11 series units. It fits the ED11-800 and the ED11-910 machines. It also fits the H12-001 and the H12-600 consoles. The part fits all other H12 series models in the manufacturer lineup.

Is Bemis 1051 the same as Essick Air 1051?

These two names refer to the same physical cartridge. Bemis sold its Home Comfort Division to Essick Air Products. Your replacement box might display either brand name on the outside cardboard packaging.

How often do I replace the cartridge?

The listing rates this air cleaning filter for an average life of about one year. You should check the media visually during the middle of the cold winter season. You need to replace the part earlier if the material develops a thick gray coat. Heavy use shortens the lifespan of the cartridge.

Is the 1051 a water wick or an air filter?

The listing sells it as a wick filter replacement and describes it as a two-stage air cleaning filter with activated carbon. It filters the air the console moves. It removes dust and odors from the room air.

Which filter fits a 1040 or 1043 console?

The 1040 and 1043 numbers are different wick numbers for different consoles. Read your console label carefully before buying a new component. Call the filter experts at Water Filters FAST if your model does not appear on the official 1051 compatibility list.

Order your replacement cartridge today

Water Filters FAST stocks the exact replacement part for your console right now. Water Filters FAST lists it at $30.99. You can order a single Bemis 1051 Humidifier Filter to prep your machine for the heating season.

Shipping is free over $75, and orders under that carry a $5 flat rate. A 30-day return policy and the Water Filters FAST satisfaction guarantee back every order. Call 855-789-FAST and the filter experts will confirm the match before you buy.