Why it matters
The GeneralAire 4001 Replacement Filter is a replacement filter.
Made for GeneralAire's 4001 purifiers. The model label is usually on the back or under the filter door; match it before ordering.
Most purifier HEPA filters last six to twelve months in normal use; follow the unit's filter indicator and replace sooner in smoky or pet-heavy homes.
Use the filter made for your exact unit: purifier filters seal against their own housing, and a close-but-different filter lets air bypass the media.
The listing gives dimensions of 25 inL x 8 inW x 6 inTh.
Who it's for, and who should skip it
Good fit if
- GeneralAire 4001 owners
- Keeping rated performance
Look elsewhere if
- Other purifier models
Pros and cons
Pros
- Exact-fit replacement
Cons
- Only fits its own unit family
- A recurring cost of owning the purifier
Limitations to weigh
- Specifications are the maker's or seller's own figures; check fit against your equipment's model number and the actual size.
Specifications
The bracket shows where each figure comes from.
| Model number | 12758 | Retailer |
|---|---|---|
| MERV rating | 11 | Retailer |
| Dimensions (seller) | 25"L x 8"W x 6"Th | Retailer |
| Compatible devices | Air Cleaner | Retailer |
Alternatives worth comparing
More air purifier replacement filters we cover
- IQAir Atem Desk Replacement Filter
- VEVA Replacement Filter for GermGuardian AC4825
- Levoit LV-H132 Air Purifier Replacement Filter $22.99
- Blueair Blue Pure 411 Series Allergenblock Filter $37.99
- Medify Air MA-25 Filter Set $49.99
All air purifier replacement filters, compared in one table · Every GeneralAire product we cover
Final verdict
A sensible choice for generalAire 4001 owners. Confirm the model it fits before ordering.
Where to buy
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