KNKA Air Purifiers for Home Bedroom Up to 1,695 Ft² in 1 Hr, APH4000
$129.99 is an ordinary price for this.
The middle price across the 23 days we have watched it, counting the days a limited-time deal was running, was $129.99. It has held a price as low as $119.97, so there is room to wait if the timing is yours to choose. It touched $113.97 on October 6 without holding it.
The lowest, $113.97 on October 6, was a deal only Prime members could buy at. The lowest anyone could pay was $119.97.
This describes the prices we recorded. It is not a forecast of where this one goes next.
Price at AmazonVerified
In the Department of Energy’s test, sixteen hours a day, this air purifier uses 304 kWh a year: about $56 a year at the US average of 18.31¢ per kWh (July 2026). Its certified clean air delivery rate is 226 cfm, for rooms up to 350 sq ft.
Price history
One line: the best price any tracked retailer charged, per day.
Price set by a third-party seller, not the retailer itselfLightning or limited-time dealDeal for Prime members only
sales rank — the line rises as it sells moreShaded stretches are sales, from our calendar.
| Price | Now | Lowest | Highest | Usual | Average | Days recorded |
|---|---|---|---|---|---|---|
| New | $129.99 | $113.97 on Oct 6 | $129.99 on Sep 25 | $129.99 | $125.55 | 23 |
Sales events
Next on the calendar: Black Friday, November 27. We keep checking this price through it and report here what it did.
What our record shows
- $16.02 more than the $113.97 it cost on October 6 — this price went up, not down.
Computed from our own checks at Amazon as of October 10. No line here uses a price a retailer told us about.
Where to buy
- Held for
- 2d
- Their 23-day low
- $113.97
- Checked
- 31m ago
Prices checked at least every 12 hours. “Held for” is how long that retailer has been charging this price. A hidden price is one we cannot re-confirm recently enough to publish.
We earn a commission on purchases. It never affects our rankings.
Tell me when it drops
A notification in this browser when the price falls. No email, no account, nothing to install.
A notification carries a button that stops that alert; blocking notifications for this site in your browser stops them all.
What it is
6 attributes, in the retailer’s own words. We record the prices; these we only pass on.
- Size
- M
- Color
- White
- Weight
- 9.68 pounds
- Dimensions
- 17.09 × 12.36 × 8.15 inches
- Model
- APH4000
- Warranty
- 2-Year Warranty
Cheaper in Air & climate, and what changes
Things we track on the same shelf for at least 10% less than $129.99, with the attributes the retailers describe differently. Their words, not our judgement — we record prices, we do not test products.
LevoitAir Purifier for Home Pets Hair Allergens in Bedroom Quiet Purifiers$89.99 at Amazon $40.00 lessWeight: 7.9 pounds instead of 9.68 poundsDimensions: 14.2 × 8.7 × 8.7 inches instead of 17.09 × 12.36 × 8.15 inches
LevoitAir Purifier for Home Pets Bedroom Dorm Room Washable Pre-Filter$108.29 at Amazon $21.70 lessWeight: 8.6 pounds instead of 9.68 poundsDimensions: 15.98 × 12.64 × 6.3 inches instead of 17.09 × 12.36 × 8.15 inches
MOOKAAir Purifiers for Home Large Room up to 2200sq.ft, MOOKA Air purifier for Home Pets with Washable Filter, PM 2.5 Display Air Quality Sensor Air Cleaner for Bedroom, Dorm room, Pets, Office PR1 (White)$79.99 at Amazon $50.00 lessWeight: 8.91 pounds instead of 9.68 poundsDimensions: 16.3 × 12.3 × 6.4 inches instead of 17.09 × 12.36 × 8.15 inches
Every change we recorded at Amazon
Every row is a price we saw change. We write one only when a price actually moves, so a gap here means the price held.
| When | Price | Change |
|---|---|---|
| · 2d ago | $129.99 | −$130.00 |
| · 2d ago | $259.99 | +$146.02 |
| · 4d ago | $113.97 | −$16.02 |
| · 15d ago | $129.99 | −$130.00 |
| · 15d ago | $259.99 | +$140.02 |
| · 22d ago | $119.97 | first seen |
Others we track in Air & climate
See all Air & climate prices
BREATHEAirmonitor Plus Indoor Air Quality Monitor w/CO₂, PM & App. Gen 2.$129.99 · low $99.991 retailer · 10 recorded prices
GEWindow Air Conditioner 5,000 BTU AC Unit for Small Spaces up to 150 sq ft with Manual Controls & 2 Cooling Modes, Easy Install Kit, White$139.991 retailer · 2 recorded prices
AQItech16-in-1 Indoor Air Quality Monitor, High-Precision Multi-Parameter Smart Air Quality Tester with HD Real-Time Color Screen, Portable Air Quality Monitor for Home, Office, Cars, Bedroom (Dark Gray)$139.991 retailer · 1 recorded price
SharkNeverChange Air Purifier, HP152, Charcoal$149.001 retailer · 18 recorded prices
FreAireAir Purifiers for Home Large Room Up to 2600 Ft², HAP605, White$149.99 · low $89.991 retailer · 6 recorded prices
qingpingAir Quality Monitor Gen 2, Air Quality Monitor Indoor Detects PM2.5, CO2, PM10, Noise, Temperature and Humidity, New Upgraded Alarm Clock Function, Air Quality Tester for Bedroom, Smart Home$149.991 retailer · 1 recorded price
$129.99
at Amazon · we earn a commission