SharpKC-850U

Air purifier

DOE certified smoke CADR

169cfmDOE test

Dust 178 · PM2.5 173 cfm

Effective room size 262 sq ft (DOE)

DOE data as of 2026-11-03DOE record

Does it fit your room? How DOE sizes rooms

Sharp KC-850U: certified to DOE with smoke CADR 169 cfm, dust 178, PM2.5 173, effective room size 262 sq ft. DOE data as of 2026-11-03.

Every model number on this record

Filed with DOE under basic model KC-850U. A listing with any of these numbers is this unit.

Every model number filed under basic model KC-850U, DOE data as of 2026-11-03
Model numberFiled by
KC-850U (DOE basic model)Sharp

How much does the Sharp KC-850U cost to run?

About $4.18 a month, or $50.12 a year, on DOE's annual energy figure of 276 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 $2.76.

How does the Sharp KC-850U 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 3.7 is tied for 53rd of the 63, and 26% below their median of 5.

DOE's annual energy figure for it is 276 kWh, against their median of 266 kWh: $1.82 a year more at the US average price.

Air purifiers for 200 sq ft (80 with a listing)

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

Smoke CADR (cfm)169

Higher than 30 of 140.

143591 cfm

Efficiency (CADR/W)3.7

Higher than 16 of 140. 2 others share 3.7.

313.5

Three to compare with

From models with a matched listing.

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

    Blueair 4512311000161 smoke CADR

    Room size 250 sq ft, CADR/W 8.6: about 57% less power for the same clean air.

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

    Sharp FPK50UW167 smoke CADR

    Room size 259 sq ft, CADR/W 4.1: about 10% less power for the same clean air.

  • Nearest bigger unit

    HEAPETS XT-C05193 smoke CADR

    Room size 299 sq ft, CADR/W 3.3.

DOE record

Air cleaning

Smoke CADR
169 cfm
Dust CADR
178 cfm
PM2.5 CADR
173 cfm
Effective room size
262 sq ft
Efficiency (IEF)
3.7 cfm/W
Energy use
276 kWh/year

Record

DOE basic model
KC-850U
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 262 sq ft, based on its smoke CADR of 169 cfm: CADR and room size.
How much does the Sharp KC-850U cost to run for a year?
About $50.12: DOE's annual figure of 276 kWh at 18.16¢/kWh, the US residential average for August 2026 (EIA).