Why it matters
The Filter-Monster CO-400-FM1 Replacement Filter for Coway is a replacement filter.
Made for Filter-Monster's CO-400-FM1 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.
Compared with the Filter-Monster Replacement Filter for Rabbit Air MinusA2: MERV rating 16 here vs 17.
The listing gives dimensions of 14.25 inL x 11 inW x 2 inTh.
Who it's for, and who should skip it
Good fit if
- Filter-Monster CO-400-FM1 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 | CO-400-FM1 | Retailer |
|---|---|---|
| MERV rating | 16 | Retailer |
| Dimensions (seller) | 14.25"L x 11"W x 2"Th | Retailer |
Alternatives worth comparing
More air purifier replacement filters we cover
- Levoit Core 200S-P 3-Stage Replacement Filter $25.99
- Honeywell HRF-R1C Replacement Filter
- Molekule MH1-PF3 Pre-Filter
- PuroAir 400 HEPA Replacement Filter $82.99
- Blueair Blue Pure 121 Replacement Filter
All air purifier replacement filters, compared in one table · Every Filter-Monster product we cover
Final verdict
A practical choice for filter-Monster CO-400-FM1 owners. Confirm the model it fits before ordering.
Where to buy
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