1 / 7Airtiancai APH4000 Replacement Filters, 4-Pack
Airtiancai APH4000 replacement filters are a four-pack listed as compatible with the KNKA APH4000 air purifier. Their HEPA and activated-carbon construction is described as a three-stage filter, so verify the purifier model before ordering and treat the stated filtration performance as a manufacturer claim.
At a glance
- Listed as compatible with the KNKA APH4000 air purifier.
- Described as a three-stage design with a pre-filter, HEPA filter and activated-carbon filter.
- The listing says the filter captures 99.97% of airborne particles down to 0.3 microns. This is a manufacturer claim, not an independently verified result.
- The listing recommends replacement every 6–8 months depending on use and environment.
Reference price: $49.99
Price checked: Nov 14, 2026
View offerAhead of Black FridayExplore the selectionPros and cons
Pros
- Four filters are listed in the package, offering replacements for successive filter changes.
- The stated three-stage design combines particle filtration with an activated-carbon layer intended to reduce odors.
- Listed dimensions help buyers compare the filter with their existing replacement.
Technical specifications
4 specifications| Brand | Airtiancai |
|---|---|
| Model | 4 Pack APH4000 Replacement Filter |
| Dimensions listed | 12.05"L x 10.08"W x 0.98"Th |
|---|
| Material listed | HEPA+Activiated Carbon |
|---|
What to know before buying
- Confirm that your purifier is the KNKA APH4000 and compare the listed dimensions before ordering. The recommended 6–8-month replacement interval depends on usage and environment. The 99.97% particle-capture figure and odor-reduction statements are manufacturer claims.
Who is it for?
A good fit for
- KNKA APH4000 owners seeking a four-filter replacement supply.
- Buyers looking for a replacement filter listing that combines HEPA and activated carbon.
Less suited to
- Owners of other purifier models unless compatibility is confirmed.
- Buyers who require independently verified filtration performance.
Customer reviews on Amazon
- 5 stars
85% 85% - 4 stars
9% 9% - 3 stars
3% 3% - 2 stars
2% 2% - 1 star
1% 1%
Aggregate customer ratings lean strongly positive, with most ratings in the five-star category, but a smaller share are lower. Ratings alone do not identify specific strengths or problems. For buyers, fit with the KNKA APH4000 and the stated filter dimensions are practical checks that ratings cannot resolve.
Frequently asked questions
Which purifier is this filter listed for?
The listing says it is compatible with the KNKA APH4000 air purifier. Check your model before purchase.
What filter materials are specified?
The listed material is HEPA and activated carbon. The feature description also calls it a three-stage filter with a pre-filter.
How often does the listing recommend replacement?
It recommends replacing the filter every 6–8 months, depending on usage and environment.
What are the listed dimensions?
The listed dimensions are 12.05"L x 10.08"W x 0.98"Th. Compare these with your existing filter before ordering.
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