KNKA APH4000 Air Purifier with 2 Filters
- 350 square feet rated floor area
- HEPA, 3-stage filtration with dual air intakes and outlets
- Pack of 2 replacement filters included with the purifier
- Smoke, dust, pollen, odors and VOCs named as targets
Last refreshed Sep 24, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A small-room HEPA purifier with spare filters included. The listing gives no noise level, airflow rating or filter life, so confirm those before you buy.
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ASIN: B0FYC4QDWSModel: APH4000Category: HEPA Air Purifiers
Overview
KNKA built the APH4000 around a three-stage filter with HEPA media and dual air intakes and outlets. The listing pairs the purifier with a set of genuine replacement filters, so the first swap is already in the package.
Spare filters in the package are the practical selling point, and the stated coverage suits a bedroom or office. The data stops at coverage and filter stages, with no sound, airflow, size or warranty detail.
Who it's for
Someone cleaning the air in a single average-size room, with smoke, dust or pollen as the concern, gets a filter swap included. Buyers comparing noise, clean air delivery or smart features will find too little here.
Pros and cons
- Spare replacement filters included
- HEPA in a multi-stage filter
- Dual air intakes and outlets
- Targets smoke, dust, pollen and VOCs
- Noise level, airflow and filter life not listed
- Coverage suits one room only
- Controls and sensors not described
Performance notes
Air is drawn in through multiple intakes, passes the filter stages and returns through multiple outlets, so the filter media decides what is captured. Real results depend on how long the filters run and when they are swapped. With no airflow rating given, the stated coverage is the only guide to room fit.
Specifications
| Brand | KNKA |
|---|---|
| Model | APH4000 |
| Included components | |
| Number of Packs | 2 |
| Other details | |
| Floor Area | 350 square feet |
| Filter Type | HEPA |
| Filter Class | Multi-stage, 3-stage filtration |
| Contaminant Filtration Capability | Cigarette smoke, dust, odors, pollen, VOCs |
| Special Features | Dual air intakes and outlets, included replacement filters |
Frequently asked questions
How often should the KNKA APH4000 filter be replaced?
The listing gives no replacement interval. It does include replacement filters, so the first swap is covered when you need it.
Does the KNKA APH4000 come with two purifiers?
The title describes one purifier with a 2 pack of replacement filters, and the spec table shows a pack count of 2.
Is the KNKA APH4000 suitable for a large living room?
The listed floor area is 350 square feet, which points to a single room rather than an open-plan space.
Does the KNKA APH4000 remove smoke and pollen?
The listing names cigarette smoke, dust, odors, pollen and VOCs as filtration targets.