One unit, 3 brandsHAP-601W

FreAire HAP-601W = ECOSELF HAP-601W · Air purifier filed by ECOSELF and 2 other brands

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

HAP-601W (ECOSELF, FreAire and HASHONE): all filed with DOE under one basic model, HAP-601W, certified at 46 cfm. DOE data as of 2026-11-03.

Sold as

  • ECOSELF

    HAP-601W

    46 cfm

    No Amazon listing matched as of 2026-11-03.

  • FreAire

    HAP-601W

    46 cfm

    No Amazon listing matched as of 2026-11-03.

  • HASHONE

    HAP-601W

    46 cfm

    No Amazon listing matched as of 2026-11-03.

The filings

DOE lists one individual model number, HAP-601W, under basic model HAP-601W, 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.

Each brand's DOE filing under basic model HAP-601W, DOE data as of 2026-11-03. Identical columns are the evidence.
BrandModel numbersSmoke CADRCADR/WRoom size, sq ftListing
ECOSELFHAP-601W46270None matched
FreAireHAP-601W46270None matched
HASHONEHAP-601W46270None matched

How we know it's one unit

Every brand here filed its model numbers under the same DOE basic model, HAP-601W. 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 HAP-601W 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 HAP-601W.

How much does the HAP-601W 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 HAP-601W, and is it the same under every brand?

Who makes the FreAire HAP-601W?
DOE's records don't say. The FreAire HAP-601W is filed under basic model HAP-601W 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 HAP-601W the same as the ECOSELF HAP-601W?
Yes, by DOE's records. Both are filed under basic model HAP-601W 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 HAP-601W 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