KNKA APH4000 HEPA Air Purifier
- 350 sq ft room rating, 1,695 sq ft in 1 hour per title
- 22 dB noise level
- 0.3 micrometer HEPA retention
- 45 watts, 9.7 pounds
- Pet, eco, auto and sleep modes
- Dual 3-stage filters, washable pre-filter
- 2 year warranty, AHAM verified
Last refreshed Sep 8, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A HEPA air purifier with an AQI display, a washable pre filter and pet, eco, auto and sleep modes. Coverage is quoted two ways, and no app or Wi-Fi is listed.
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ASIN: B0FNDG2TNKModel: APH4000Category: HEPA Air Purifiers
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Overview
A bedroom with pets or pollen season is the setting for this HEPA purifier, which draws air through a washable pre filter and two three stage filters. An AQI display shows air quality, and four modes set the fan.
HEPA filtration, an AQI display, a washable pre filter and several modes cover a bedroom for pet and pollen use. Room rating and air change claims are quoted differently in the title and the specs.
Who it's for
Pet owners and pollen sufferers who want to see air quality and run a quiet night mode. Buyers needing app control or Wi-Fi should note that none is listed.
Pros and cons
- Washable pre filter
- Pet and sleep modes
- Two year warranty
- Coverage quoted two ways
- No app listed
- Replacement filter details not listed
Performance notes
The pre filter catches hair and larger dust, and the HEPA stage traps fine particles down to the stated retention size. Pet, eco, auto and sleep modes change how the fan runs, and the AQI display shows the room reading.
Where it stands among hepa air purifiers
- 22 dB noise level: quieter than 74% of the hepa air purifiers we list.
From the specs of the 101 hepa air purifiers we list; not a test result.
Specifications
| Brand | Knka |
|---|---|
| Model | APH4000 |
| Dimensions & fit | |
| Particle Retention Size | 0.3 micrometers |
| Item Dimensions D x W x H | 8.15 x 12.36 x 17.09 inches |
| Item weight | 9.7 pounds |
| Capacity & performance | |
| Noise Level | 22 dBlower than 74% of 48 hepa air purifiers |
| Wattage | 45 watts |
| Power & efficiency | |
| Power Source | ac_dc |
| Construction & materials | |
| Color | White |
| Included components | |
| Included Components | 1 air purifier, 2 three-stage filters (pre-installed), 1 user manual |
| Unit Count | 1 Count |
| Warranty & support | |
| Warranty Description | 2 years |
| Software Update Supported To Date | unknown |
| Other details | |
| Floor Area | 350 square feetlower than 76% of 22 hepa air purifiers |
| Filter Type | HEPA |
| Contaminant Filtration Capability | Cigarette smoke, dust, odors, pet dander, pet hair, pollen, VOCs, wildfire smoke |
| Special Features | AQI display, dual 3-stage filters, pet, eco, auto and sleep modes, washable pre-filter |
| Specification Met | CARB, DOE, ETL, FCC |
| Control method | Touch |
| Controller Type | Hand Control |
| Item Type Name | APH4000 Air Purifier |
| Manufacture Year | 2025 |
Closest rivals on specs
Blueair Mini Max Air Purifier- Floor Area 350 vs 107 sq ft (+227%)
- Noise Level 22 vs 20 dB (+10%)
Levoit Core 300-P HEPA Air Purifier- Floor Area 350 vs 1073 sq ft (-67%)
- Item Weight 9.7 vs 7.9 pounds (+23%)
- Wattage 45 vs 56 watts (-20%)
PuroAir 240 HEPA Air Purifier- Floor Area 350 vs 1000 sq ft (-65%)
- Item Weight 9.7 vs 7.3 pounds (+33%)
- Wattage 45 vs 22 watts (+105%)
Frequently asked questions
Is the KNKA APH4000 a smart Wi-Fi air purifier?
No app or Wi-Fi is listed. Control is touch, and the display shows air quality.
Is the KNKA APH4000 a true HEPA purifier?
The filter type and class are listed as HEPA with a 0.3 micrometer retention size. No efficiency percentage is given.
Is the KNKA pre-filter washable?
Yes. The features list a washable pre-filter.
What comes with the KNKA APH4000?
The purifier, two three stage filters that are pre-installed, and a user manual.