WinixC545

Air purifier

DOE certified smoke CADR

234cfmDOE test

Dust 225 · PM2.5 230 cfm

Effective room size 363 sq ft (DOE)

DOE data as of 2026-11-03DOE record

Does it fit your room? How DOE sizes rooms

Winix C545: certified to DOE with smoke CADR 234 cfm, dust 225, PM2.5 230, effective room size 363 sq ft. DOE data as of 2026-11-03.

Every model number on this record

Filed with DOE under basic model C545. A listing with any of these numbers is this unit.

Every model number filed under basic model C545, DOE data as of 2026-11-03
Model numberFiled by
C545 (DOE basic model)Winix

How much does the Winix C545 cost to run?

About $4.75 a month, or $57.02 a year, on DOE's annual energy figure of 314 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 $3.14.

How does the Winix C545 rank in its DOE class?

In its DOE class (air purifiers, PM2.5 CADR 150+ cfm), 63 models have a matched Amazon listing. Its CADR/W of 4.3 is tied for 42nd of the 63, and 14% below their median of 5.

DOE's annual energy figure for it is 314 kWh, against their median of 266 kWh: $8.72 a year more at the US average price.

Air purifiers for 300 sq ft (44 with a listing)

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

Smoke CADR (cfm)234

Higher than 66 of 140. 1 other shares 234.

143591 cfm

Efficiency (CADR/W)4.3

Higher than 34 of 140. 2 others share 4.3.

313.5

Three to compare with

From models with a matched listing.

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

    DREAME CVF20B224 smoke CADR

    Room size 347 sq ft, CADR/W 8.8: about 51% less power for the same clean air.

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

    Blueair 6331411000232 smoke CADR

    Room size 360 sq ft, CADR/W 4.9: about 12% less power for the same clean air.

  • Nearest bigger unit

    Coway AP-1526D255 smoke CADR

    Room size 395 sq ft, CADR/W 7.6.

DOE record

Air cleaning

Smoke CADR
234 cfm
Dust CADR
225 cfm
PM2.5 CADR
230 cfm
Effective room size
363 sq ft
Efficiency (IEF)
4.3 cfm/W
Energy use
314 kWh/year

Record

DOE basic model
C545
DOE class
150 <= PM2.5 Clean Air Delivery Rate
Brands on the filings
1
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 363 sq ft, based on its smoke CADR of 234 cfm: CADR and room size.
How much does the Winix C545 cost to run for a year?
About $57.02: DOE's annual figure of 314 kWh at 18.16¢/kWh, the US residential average for August 2026 (EIA).