KOIOS: 2 DOE certified models

KOIOS has 2 air purifier basic models certified to DOE as of 2026-11-03, rated smoke CADR 88 to 121 cfm. 2 are the same unit as models filed under other brands. How their efficiency compares with their DOE class is below.

Highest certified smoke CADR among its air purifiers: KOIOS PR1 E220 at 121 cfm.

Source: DOE Compliance Certification Database (air purifiers), data as of 2026-11-03.

Air purifiers

2 KOIOS air purifiers. DOE data as of 2026-11-03.
#	Photo	Model	Labels	Smoke CADR, cfm	Room size	PM2.5 CADR	CADR/W	Brands
1		KOIOSPR1 E220filed as BAREN PR1 E220	CADR/W 3.9 Sold under 3 brands	121cfm, 188 sq ft	188 sq ft	127	3.9	3
2		KOIOSK03filed as BAREN K03	CADR/W 3.8 Sold under 5 brands	88cfm, 136 sq ft	136 sq ft	91	3.8	5

How efficient are KOIOS air purifiers?

Of the 2 KOIOS air purifiers, 1 files a higher CADR/W than the class median and 1 falls below it.

KOIOS air purifiers against the median CADR/W of their DOE class. DOE data as of 2026-11-03.
DOE class	KOIOS models	Above median	Class median	Best KOIOS
Air purifiers, PM2.5 CADR 10 to 99 cfm (90)	1	1	CADR/W 3.5	K03 CADR/W 3.8
Air purifiers, PM2.5 CADR 100 to 149 cfm (66)	1	0	CADR/W 4.65	PR1 E220 CADR/W 3.9

A higher CADR/W means more clean air per watt.

Who makes KOIOS air purifiers?

DOE's database has no manufacturer field, so the evidence is whose model number each unit is filed under and which other brands file the same unit.

KOIOS shares 2 units with 4 other brands. Brands it shares with, and how many units each:

KOIOS units filed under one DOE basic model with other brands. DOE data as of 2026-11-03.
Basic model	KOIOS model	Number belongs to	Brands
K03	K03	No known prefix	5
PR1 E220	PR1 E220	No known prefix	3

How much does a KOIOS air purifier cost to run?

DOE's annual energy figures for the 2 KOIOS air purifiers that file one run from 139 to 190 kWh a year: about $25.24 to $34.50 a year. The lowest is KOIOS K03 (88 cfm, CADR/W 3.8) and the highest KOIOS PR1 E220 (121 cfm, CADR/W 3.9).

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.

How does KOIOS PR1 E220 compare with other brands?

Picked by rule from models with a matched listing, DOE data as of 2026-11-03.

Within 20 cfm of its size, highest CADR/W: AROEVE DH-JH021US-A00, 138 cfm. Room size 214 sq ft, CADR/W 8: about 51% less power for the same clean air.
Nearest size in its class with a higher CADR/W: FMUKL APH2500P, 119 cfm. Room size 184 sq ft, CADR/W 5.2: about 25% less power for the same clean air.
Nearest bigger unit: WOZOYO 200004-2, 142 cfm. Room size 220 sq ft, CADR/W 6.1.

Questions about KOIOS

Is KOIOS a good air purifier brand?: How its 2 air purifiers compare on efficiency with their DOE class is above. 2 of them are the same unit as another brand's model. We don't test reliability, noise or build quality, so we can't rank brands on those. How we compare models.
What room size are KOIOS air purifiers rated for?: DOE's effective room size for its 2 rated models is 136 to 188 sq ft, from a certified smoke CADR 88 to 121 cfm. CADR and room size.
Which KOIOS air purifier is the most efficient for its size?: KOIOS K03, at CADR/W 3.8: higher than 48 of the 90 in its DOE class (air purifiers, PM2.5 CADR 10 to 99 cfm). At the other end is KOIOS PR1 E220, at CADR/W 3.9, higher than 24 of the 66 in its class.
Is KOIOS the same as BAREN?: For 2 units, yes: both file them under the same DOE basic model (K03 and PR1 E220). Compare the 5 brands of K03. Compare the 3 brands of PR1 E220.