# KNKA APH4000 Air Purifier, HEPA, White

HEPA White: The KNKA APH4000 air purifier combines dual three-stage filters with washable pre-filters, air-quality display and PET, ECO, AUTO and SLEEP modes. Its stated coverage varies substantially by room size and refresh rate, so buyers should match the operating claim to their space.

- [Original product page](https://loonieperks.com/product/knka-aph4000-hepa-air-purifier)
- [View offer](https://loonieperks.com/visit/knka-aph4000-hepa-air-purifier)
- Market: CA
- Language: en-CA
- Currency: CAD
- Brand: KNKA
- Model: APH4000
- Category: Home & Kitchen > Heating, Cooling & Air Quality > Air Purifiers
- Price: 139.99 CAD
- Previous price: 189.99 CAD
- Discount: 26%
- Price checked: 2026-11-13T12:25:03.648Z
- Rating: 4.7 / 5
- Reviews: 2907

Prices and deal status are the latest recorded data, not a guarantee of availability. Confirm the price and availability with the store.

## At a glance

- Dual front-and-back filter cartridges each use three filtration stages, including a washable pre-filter and activated carbon filter.
- PET, ECO, AUTO and SLEEP modes provide different operating settings, with four fan speeds listed.
- A built-in sensor and colour-coded display show the claimed real-time air-quality index.
- The listing states 4.8 air refreshes per hour up to 350 ft², but only one per hour at its larger 1,695 ft² claim.

## Pros

- Dual filters and washable pre-filters give buyers a reusable first filtration stage.
- PET, ECO, AUTO and SLEEP modes, four fan speeds and an AQI display offer several ways to manage operation.
- The manufacturer lists CADR values for smoke, dust, PM2.5 and pollen.

## Specifications

### Identity
- Brand: KNKA
- Model: APH4000
- Colour: White
### Filtration and airflow
- Filter type: HEPA
- Particle retention size: 0.3 micrometer
- Smoke, dust and PM2.5 CADR: 226 CFM \(384 m³/h\)
- Pollen CADR: 244 CFM \(415 m³/h\)
- Coverage claim: 350 ft²
- Air refresh claim: 4.8 times per hour in rooms up to 350 ft²
- Large-room coverage claim: up to 1695 ft²
- Large-room refresh claim: 1 full air refresh per hour
- Listed contaminants: Cigarette Smoke, Dust, Odors, Pet Dander, Pet Hair, Pollen, Volatile Organic Compounds \(VOCs\), Wildfire Smoke
### Modes and controls
- Control methods listed: Touch
- Modes and display: AQI Display, Dual 3-Stage Filters, PET & ECO & AUTO & SLEEP Mode, Washable Pre-Filter
- Fan speeds: four fan speeds
### Power and noise
- Power configuration: ac\_dc
- Wattage: 45 watts
- Noise level: 22 db
- Sleep-mode noise claim: 22-24 dB
### Dimensions and installation
- Dimensions listed: 19.8D x 34.3W x 44.2H centimetres
### Certifications and warranty
- Specifications met: CARB Certified, DOE Certified, ETL Certified
- Warranty description: 2-Year Warranty

## Before you buy

- Remove the filters' plastic packaging before use. The listing recommends replacing filters every 3–6 months and says to use genuine KNKA replacements.
- Coverage statements use different room sizes and refresh rates. The listing title claims up to 1,695 ft² in one hour, while detailed claims specify 350 ft² at 4.8 refreshes per hour and 1,695 ft² at one refresh per hour, with differing stated purification-efficiency figures. Treat these as manufacturer claims and choose based on the smaller-room refresh rate if frequent air turnover matters.

## In the box

- 1 x Air Purifier (Included)
- 2 x 3-Stage Original Filter \(Pre-Installed\) (Included)
- User manual (Included)

## A good fit for

- Buyers seeking an air purifier with dual filters, washable pre-filters and a visible air-quality display.
- Pet owners interested in a dedicated PET mode and filtration claims that include pet hair, dander and odours.
- Buyers who want selectable ECO, AUTO and SLEEP modes rather than a single operating setting.

## Less suited to

- Buyers who need a confirmed high refresh rate throughout a room near the stated 1,695 ft² maximum.
- Buyers who require independently verified coverage, airflow or filtration performance.

## Customer feedback

Customer rating aggregates skew strongly positive, with most ratings in the five-star category, but a smaller share falls in the lower categories. Without comment-level feedback, they do not identify specific strengths, faults or reasons for ratings. Treat the overall pattern as a limited satisfaction signal rather than evidence that the purifier achieves its stated room coverage or airflow.

## Frequently asked questions

### How large a room does the APH4000 cover?
The title claims up to 1,695 ft² with one air refresh per hour. The detailed listing also states 4.8 refreshes per hour in rooms up to 350 ft², so the appropriate claim depends on room size and desired turnover.
### What filtration does it use?
The listing describes two three-stage cartridges, each with a washable pre-filter, a high-efficiency filter and activated carbon. It also lists HEPA filtration.
### What modes and controls are listed?
The listed modes are PET, ECO, AUTO and SLEEP, with four fan speeds. Touch is given as the control method, and a built-in display is claimed to show AQI.
### What maintenance is specified?
The listing says to remove the filter packaging before use and recommends filter replacement every 3–6 months. It also identifies the pre-filter as washable.

## Alternative options

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- [Levoit Air Purifiers for Large Room Home with Washable Filter, Vital100S-P \| Air Quality Monitor, AHAM VERIFIDE, Smart WiFi, HEPA Sleep Mode, Auto Mode, Removes Pet Hairs, Allergies, Pollen, Smoke, Dust](https://loonieperks.com/visit/levoit-vital-100s-p-smart-air-purifier)
- [WINIX 5520 Air Purifier with Wi-Fi for Home Large Room Up to 1882 Ft² in 1 Hr With Air Quality Monitor, True HEPA, High Deodorization Carbon Filter and Auto Mode, Captures Pet Allergies, Smoke, Dust.](https://loonieperks.com/visit/knka-aph4000-hepa-air-purifier)
- [Air Purifier for Home with True HEPA Filter – 1,190 Sq Ft Coverage for Bedroom/Large Room, Removes Dust, Pollen, Smoke, Pet Dander & Odors, White](https://loonieperks.com/visit/knka-aph4000-hepa-air-purifier)
- [BLUEAIR Air Purifiers for Small Spaces Bedroom Dorm Office, Mini Max Auto \| Compact, Auto Sensor, Quiet HEPASilent Filtration, Washable Pre-Filter, Captures Pet Hair, Allergens, Pollen, Dust, Smoke](https://loonieperks.com/visit/knka-aph4000-hepa-air-purifier)
- [BLUEAIR Air Purifiers for Home up to 2,107 Ft², Blue 311i Max \| WiFi, Auto Mode, Quiet 23dB HEPASilent Filtration, AHAM Verified, Washable Pre-Filter, Captures Pet Hair Allergens Dust Smoke](https://loonieperks.com/visit/knka-aph4000-hepa-air-purifier)

## Add-ons

- [Afloia Air Purifiers for Bedroom Large Room Up to 1500 ft², 4-Stage Filter \| Washable Pre-Filter for Pet Dander, Dust, Smoke,](https://loonieperks.com/visit/knka-aph4000-hepa-air-purifier)
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## Images

![KNKA APH4000 Air Purifier, HEPA, White — 1](https://loonieperks.com/i/vNAN47ZrwDuSppO-RePlqOskomMSmVY8BaqXsLOflq-E0Sb-N0FN_t4NF0ElBYHNer06x8Z4-HEDz6D8VURu0t9cAr-GPYGYLbqqTp13mRwG6IW_x9hnNWIk.jpg)

![KNKA APH4000 Air Purifier, HEPA, White — 2](https://loonieperks.com/i/frFPoE4DK9VUDeuN_AJsK7kZbxOE8FwqHGRlPhNV9-Nvm_ELfvNP9t4kR9l9PAD3t5hSkQvBh0ecD-0w59SSlWyM6qCo9r42YeVOYmPS-5fGlBsLwtC2VHzd.jpg)

![KNKA APH4000 Air Purifier, HEPA, White — 3](https://loonieperks.com/i/EXlQLm3bVJao1gFl7N--JSa2H7W87N0MuG9oEnOOna5KWqyCuGhyWj_w4JfGdhJQVuT5I7IgQWN3Jt3r345HsRaKk87dCxdJQMgGvvh-TbQJfYnxi1PPKuqx.jpg)

![KNKA APH4000 Air Purifier, HEPA, White — 4](https://loonieperks.com/i/FQO4e7y06OJpdJ5Z_aCRuNqhxexstHKnlHxKhUT_t5GIrTYcFoV_eaR-JEhSX6u9YU6WyfhxT2zsbqxpO4jOtgn87j96y7RjdnTH3ZZAN_3b55xYwli1fEpn.jpg)

![KNKA APH4000 Air Purifier, HEPA, White — 5](https://loonieperks.com/i/XHd37FyblCOmj-RtNx9JVQaH3VkToAcl-VG6Fl6uOZqPRcz-u8mAz8R5KcUsy7X937lt24KMqisvGtTkeN87ujawHlUP_yFecceoJpL3GTYrs2C01TMK8R56.jpg)

![KNKA APH4000 Air Purifier, HEPA, White — 6](https://loonieperks.com/i/toY1Ty4MYx-9MU3rN45inY7lRlYIHSNukpOPpYsJz0z96y7-4_b7i5yVghlUGv8W9kQA78LfzpnMBk5Wk5M9ECPcEnMqmuzu10GpD8cogbapnY9BGNtQV2Em.jpg)

![KNKA APH4000 Air Purifier, HEPA, White — 7](https://loonieperks.com/i/DzJptPefQ3DrSzwPWktmCZ4Zc2_-pMjZ9mP0gIGd5z2fSQsLUAqU1Q-DKTSnOWbGwR0TpRwRuz4QLHF4WQpMVBl3RA5T9FYINbg0r5_51LBGg5TQFosCyM4j.jpg)