One unit, 3 brandsKJ10
FreAire KJ10 = ECOSELF KJ10 · Air purifier filed by ECOSELF and 2 other brands
- ECOSELF
- FreAire
- HASHONE
DOE certified smoke CADR, every brand
46cfmDOE test
Dust 39 · PM2.5 42 cfm
46 cfm under every nameChoose on price, warranty and what's in stock.
DOE data as of 2026-11-03DOE record
KJ10 (ECOSELF, FreAire and HASHONE): all filed with DOE under one basic model, KJ10, certified at 46 cfm. DOE data as of 2026-11-03.
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The filings
DOE lists one individual model number, KJ10, under basic model KJ10, filed under 3 brand names. Every filing lists the same figures: smoke CADR 46 cfm, PM2.5 CADR 42 cfm and a 70 sq ft room size.
| Brand | Model numbers | Smoke CADR | CADR/W | Room size, sq ft | Listing |
|---|---|---|---|---|---|
| ECOSELF | KJ10 | 46 | 2 | 70 | None matched |
| FreAire | KJ10 | 46 | 2 | 70 | None matched |
| HASHONE | KJ10 | 46 | 2 | 70 | None matched |
How we know it's one unit
Every brand here filed its model numbers under the same DOE basic model, KJ10. DOE's definition of a basic model (10 CFR 430.2) covers "all units of a given type of covered product (or class thereof) manufactured by one manufacturer" with "the same primary energy source" and nearly identical "electrical, physical, and functional (or hydraulic) characteristics that affect energy consumption, energy efficiency, water consumption, or water efficiency." So one set of DOE figures covers every name on the list. All 3 brands file KJ10 itself as their model number, so the number alone doesn't say which of them builds it.
Brands may still differ in color, controls, accessories, warranty and support. Full record and every model number: ECOSELF KJ10.
How much does the KJ10 cost to run?
DOE's record lists 125 kWh a year, the annual energy figure from DOE's test. That's about $22.70 a year.
At 18.16¢ per kWh, the US average residential price for August 2026 (EIA Electric Power Monthly, table 5.6.A). Worked out from the certified figures.
Among 90 air purifiers, PM2.5 CADR 10 to 99 cfm
Smoke CADR (cfm)46
Higher than 34 of 90. 4 others share 46.
1993 cfm
Efficiency (CADR/W)2
Higher than 1 of 90. 8 others share 2.
1.914
Who makes the KJ10, and is it the same under every brand?
- Who makes the FreAire KJ10?
- DOE's records don't say. The FreAire KJ10 is filed under basic model KJ10 along with 2 other brands. All of them file that same number as their model, and DOE's database has no manufacturer field.
- Is the FreAire KJ10 the same as the ECOSELF KJ10?
- Yes, by DOE's records. Both are filed under basic model KJ10 and list the same certified figures: smoke CADR 46 cfm, PM2.5 CADR 42 cfm and a 70 sq ft room size.
- Which brand of KJ10 is cheapest to run?
- They tie: every brand files smoke CADR 46 cfm, PM2.5 CADR 42 cfm and a 70 sq ft room size, so each costs about $22.70 a year to run.
Related units, shared brands
More: all units sold under several brands · all air purifiers