KNKAAPH4000 Pro

Air purifier · sold under 2 brands

DOE certified smoke CADR

369cfmDOE test

Dust 364 · PM2.5 367 cfm

Effective room size 572 sq ft (DOE)

DOE data as of 2026-11-03DOE record

Does it fit your room? How DOE sizes rooms

KNKA APH4000 Pro: certified to DOE with smoke CADR 369 cfm, dust 364, PM2.5 367, effective room size 572 sq ft. The same unit is also filed as FUMKL AP400 Pro. DOE data as of 2026-11-03.

Every model number on this record

Filed with DOE under basic model APH4000 Pro. A listing with any of these numbers is this unit.

Every model number filed under basic model APH4000 Pro, DOE data as of 2026-11-03
Model numberFiled by
APH4000 Pro (DOE basic model)KNKA
AP400 ProFUMKL

Same unit, 2 brands

  • KNKAAPH4000 ProNo listing matched
  • FUMKLAP400 ProNo listing matched

369 cfm under every name. Choose on price, warranty and what's in stock.

Both filed under DOE basic model APH4000 Pro. Listing status as of 2026-11-03.

Compare the 2 brands on one page

How much does the KNKA APH4000 Pro cost to run?

About $5.86 a month, or $70.28 a year, on DOE's annual energy figure of 387 kWh.

Electricity at 18.16¢/kWh, the US residential average for August 2026 (EIA Electric Power Monthly, table 5.6.A). Each 1¢/kWh you pay above or below 18.16¢ moves the yearly figure by $3.87.

How does the KNKA APH4000 Pro rank in its DOE class?

In its DOE class (air purifiers, PM2.5 CADR 150+ cfm), 63 models have a matched Amazon listing. 25 of them have a higher CADR/W than its 5.6, which is 12% above their median of 5.

DOE's annual energy figure for it is 387 kWh, against their median of 266 kWh: $21.97 a year more at the US average price.

Air purifiers for 500 sq ft (10 with a listing)

Among 140 air purifiers, PM2.5 CADR 150+ cfm

Smoke CADR (cfm)369

Higher than 124 of 140.

143591 cfm

Efficiency (CADR/W)5.6

Higher than 72 of 140. 5 others share 5.6.

313.5

Three to compare with

From models with a matched listing.

  • Within 20 cfm of its size, highest CADR/W

    WOZOYO Pure Air PA6363 smoke CADR

    Room size 563 sq ft, CADR/W 5.8.

  • Nearest size in its class with a higher CADR/W

    BOSCH Air 6000339 smoke CADR

    Room size 525 sq ft, CADR/W 6.9: about 19% less power for the same clean air.

  • Nearest bigger unit

    JAFANDA JF888423 smoke CADR

    Room size 656 sq ft, CADR/W 4.8.

DOE record

Air cleaning

Smoke CADR
369 cfm
Dust CADR
364 cfm
PM2.5 CADR
367 cfm
Effective room size
572 sq ft
Efficiency (IEF)
5.6 cfm/W
Energy use
387 kWh/year

Record

DOE basic model
APH4000 Pro
DOE class
150 <= PM2.5 Clean Air Delivery Rate
Brands on the filings
2
In DOE's list since
2026-11-02first snapshot we hold

Questions

What room size is it for?
DOE lists an effective room size of 572 sq ft, based on its smoke CADR of 369 cfm: CADR and room size.
How much does the KNKA APH4000 Pro cost to run for a year?
About $70.28: DOE's annual figure of 387 kWh at 18.16¢/kWh, the US residential average for August 2026 (EIA).
Who makes the KNKA APH4000 Pro?
DOE's database has no manufacturer field, so the record doesn't say. It does show 2 brands filing one basic model, APH4000 Pro: KNKA and FUMKL.
Is the KNKA APH4000 Pro the same as the FUMKL AP400 Pro?
Yes, by DOE's records. FUMKL files AP400 Pro under the same basic model, APH4000 Pro, with the same 369 cfm.