AIRx 16x21x5WR-ALLERGY | Our#: 174277

16x21x5 AIRx ALLERGY White Rodgers FR1000-100 Replacement Air Filter - MERV 11

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AIRx 16x21x5WR-ALLERGY | Our#: 174277

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Reduce common allergy symptoms

  • Reduces allergy irritating particles
  • Captures allergens like dust, mold spores, pet dander, dust mite debris and more
  • Lessens odors from car fumes & smog
  • Creates cleaner indoor air
  • Actual Dimensions: 16 ¼" x 21" x 5"

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Frequently Purchased Together

Product Details

16x21x5 AIRx ALLERGY White Rodgers FR1000-100 Replacement Air Filter - MERV 11

Aftermarket Replacement for White-Rodgers Comfort PlusTM media filter - Rated MERV 11. 

Same as Filter Model # FR1000-100
Fits in ACB1000-101 Media Cabinet.
Same as filter in ACM1000-101 Cabinet Kit
Fits 0121-018000 Air Cleaner

Save money by purchasing a "generic" aftermarket product.  Not manufactured by White-Rodgers.

Size: 16" x 21" x 5"
Actual Size:  16 1/4" x 21 x 5

This filter can also be used to replace the cells in the Model SST 10C26S-xxx electronic air cleaner.

. Durable construction for easy, slide-in replacement.
. Disposable for convenience.
. Packaged in convenient 2-Pack

Do you want to know about the technical specs?

Nominal Dimensions
16 x 21 x 5"
Actual Dimensions
16 ¼ x 21 x 5"
Filter Media
Electrostatically charged 100% synthetic gradient media that does not support microbiological growth
Filter Support Grid
30 gauge galvanized expanded metal grid
Moisture resistant double-wall beverage board
Max Temperature
180F (82C) continuous service, peak 225F (107C)
Max Humidity
Resistant to 100% R.H.

Replaces These Filters:

National Filter Sales:

How to change your furnace/air-conditioner/HVAC air filter

Estimated time: 10 minutes or less


  1. Determine the location of your filter

    Your forced air system will be similar, whether or not it is a heating (furnace) or cooling (AC) system – or both. The furnace filter housing/slot is located right next to the heating/cooling system’s air handler or blower. Your filter(s) may also be located in a return grille on the wall or ceiling of your home.

  2. Determine the type/size of filter that you use

    Typically, the dimensions or part number of the filter will be printed on the filter frame. Use this information to order a new filter.

  3. Purchase a new air filter from

    Visit and purchase a new filter. Use our filter finders to verify the correct match.

  4. Remove the old filter

    Turn off the power to the heating/cooling system and remove the old filter from its housing/slot and discard.

  5. Insert the new filter

    Pay attention to any airflow direction arrows printed on the frame of the new filter. Install the filter by sliding it into the filter housing/slot with the airflow arrow pointing towards the blower. If installing the filter in a wall or ceiling grille – the airflow arrow should point towards the wall or ceiling. Turn on the power to the forced air system.

    Enjoy cleaner air!