PurivortexKJ100F

Air purifier · sold under 2 brands

DOE certified smoke CADR

47cfmDOE test

Dust 50 · PM2.5 48 cfm

Effective room size 73 sq ft (DOE)

DOE data as of 2026-11-03DOE record

Does it fit your room? How DOE sizes rooms

Purivortex KJ100F: certified to DOE with smoke CADR 47 cfm, dust 50, PM2.5 48, effective room size 73 sq ft. The same unit is also filed as SEJOY AC400. DOE data as of 2026-11-03.

Every model number on this record

Filed with DOE under basic model KJ100F. A listing with any of these numbers is this unit.

Every model number filed under basic model KJ100F, DOE data as of 2026-11-03
Model numberFiled by
KJ100F (DOE basic model)Purivortex, SEJOY
AC400Purivortex, SEJOY
KJ100F-C1Purivortex, SEJOY
PX500Purivortex, SEJOY

Same unit, 2 brands

Every brand files AC400, KJ100F, KJ100F-C1, PX500.

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

Both filed under DOE basic model KJ100F. Listing status as of 2026-11-03.

Compare the 2 brands on one page

How much does the Purivortex KJ100F cost to run?

About $1.03 a month, or $12.35 a year, on DOE's annual energy figure of 68 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 68¢.

How does the Purivortex KJ100F rank in its DOE class?

In its DOE class (air purifiers, PM2.5 CADR 10 to 99 cfm), 42 models have a matched Amazon listing. Its CADR/W of 3.4 is 21st of the 42, and 1% above their median of 3.35.

DOE's annual energy figure for it is 68 kWh, against their median of 94.5 kWh: $4.81 a year less at the US average price.

Air purifiers (133 with a listing)

Among 90 air purifiers, PM2.5 CADR 10 to 99 cfm

Smoke CADR (cfm)47

Higher than 39 of 90. 2 others share 47.

1993 cfm

Efficiency (CADR/W)3.4

Higher than 43 of 90.

1.914

Three to compare with

From models with a matched listing.

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

    DREAME CVA10B54 smoke CADR

    Room size 84 sq ft, CADR/W 10.3: about 67% less power for the same clean air.

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

    Bionaire BAP926046 smoke CADR

    Room size 71 sq ft, CADR/W 4.5: about 24% less power for the same clean air.

  • Nearest bigger unit

    Blueair 313100010069 smoke CADR

    Room size 107 sq ft, CADR/W 8.

DOE record

Air cleaning

Smoke CADR
47 cfm
Dust CADR
50 cfm
PM2.5 CADR
48 cfm
Effective room size
73 sq ft
Efficiency (IEF)
3.4 cfm/W
Energy use
68 kWh/year

Record

DOE basic model
KJ100F
DOE class
10 <= PM2.5 Clean Air Delivery Rate < 100
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 73 sq ft, based on its smoke CADR of 47 cfm: CADR and room size.
How much does the Purivortex KJ100F cost to run for a year?
About $12.35: DOE's annual figure of 68 kWh at 18.16¢/kWh, the US residential average for August 2026 (EIA).
Who makes the Purivortex KJ100F?
DOE's database has no manufacturer field, so the record doesn't say. It does show 2 brands filing one basic model, KJ100F: Purivortex and SEJOY.
Is the Purivortex KJ100F the same as the SEJOY AC400?
Yes, by DOE's records. SEJOY files AC400, KJ100F and KJ100F-C1 under the same basic model, KJ100F, with the same 47 cfm.