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General Aire 4521 Filter Media

SKU#: 4521
List Price: $40.99 Sale Price: $34.99
Product Description

Replacement Filter Media.

This component is also known as part number: 14164, 3FM1625

Replace every 6 months if you have heating & cooling OR every 12 months if you only have heating. If you have a dusty environment or shedding pets you may need to replace your filter more often.

The manufacturer is sometimes referred to as General Filters, General Air but is correctly spelled GeneralAire®.


Nominal Width:
25 (inches)
Nominal Height:
16 (inches)
Nominal Thickness:
3 (inches)
Exact Width:
24 1/4 (inches)
Exact Height:
15 1/2 (inches)
Exact Thickness:
3 (inches)
1 (lb) 4 (oz)
Direction of Air Flow:
Indicated on Product
On Product Packaging

Product Reviews

Add your review of this product Global rating: 5.00 from 2 reviews
Dec 13, 2018
Furnace filter by Randy (West chicago IL US)

Easy ordering, good price, arrived quickly.

Sep 1, 2018
Great products by Denise Atherton-Bentley (Buckner KY US)

Called customer service to place order, they were very helpful, was not sure of the sizing listed would work for me. The filter fits great! Fast shipping also. Can't ask for more!


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