Best ENERGY STAR Air Purifier (2026): Yearly Power Cost by Room Size

For a living room or large bedroom, buy the Honeywell HPA4300B ($158.11 on November 11, 2026). ENERGY STAR certifies it at 185 kWh a year, about $34 to run, and AHAM, the group that tests purifiers, certifies it for 354 sq ft. For a bedroom or small room, the Dreo 338 is $59.98.

Honeywell HPA4300B

Best for a living room

Honeywell HPA4300B

$158.11 on Amazon

Check price on Amazon
  • ENERGY STAR certifies it at 185 kWh a year, about $34 at the U.S. average of 18.19 cents per kWh.
  • AHAM, the trade group that tests purifiers, certifies it for 354 sq ft. Its smoke CADR is 229: the cubic feet of air it cleans of smoke each minute. That is enough for a living room or a large bedroom.
  • The cheapest of the 4 ENERGY STAR purifiers we can buy today that cover 300 sq ft or more.

Which one is right for you?

  • For a bedroom or small room, up to 178 sq ft

    Dreo 338 · Room size: 178 sq ft · 125 kWh a year (about $23) · 5.5 cubic feet of clean air a minute for each watt

    The cheapest ENERGY STAR purifier we can buy today, with a low yearly power cost, and a true HEPA filter in AHAM's record.

    $59.98 on Amazon

  • For a room up to 225 sq ft

    Dreo DR-HAP009AS · Room size: 225 sq ft · 159 kWh a year (about $29) · 5.6 cubic feet of clean air a minute for each watt

    The cheapest ENERGY STAR purifier in the 200 to 299 sq ft range.

    $107.93 on Amazon

  • If you want a Winix, for up to 418 sq ft

    Winix T810 · Room size: 418 sq ft · 259 kWh a year (about $47) · 6.1 cubic feet of clean air a minute for each watt

    The cheapest ENERGY STAR Winix we can buy today. AHAM lists its filter as True HEPA.

    $175.99 on Amazon

  • For a very large room, up to 563 sq ft

    Wozoyo Pure Air PA6 · Room size: 563 sq ft · 373 kWh a year (about $68) · 5.6 cubic feet of clean air a minute for each watt

    AHAM certifies it for 563 sq ft, the largest ENERGY STAR room here.

    $249.99 on Amazon

Prices are Amazon's on November 11, 2026. Yearly energy use is ENERGY STAR's certified figure; the dollar cost is that figure at the U.S. average of 18.19 cents per kWh.

By Erin Rose · Updated

01 / Savings

What ENERGY STAR saves on a purifier

ENERGY STAR says a standard room air cleaner running all the time uses about 394 kWh a year, about $72 at the U.S. average of 18.19 cents per kWh. Certified models are "more than 50% more energy-efficient than standard models."[1][2]

The table shows each pick's certified yearly use against that standard. Pick the room size first, then the lowest power use. Yearly power cost across these picks runs from $17 to $68.[1]

Each ENERGY STAR purifier's certified yearly energy use, cost at the U.S. average rate, and savings against a standard purifier
PurifierkWh a yearCost a yearSaved a year
Wozoyo Pure Air PA292$17$55
Dreo 338125$23$49
Dreo DR-HAP009AS159$29$43
Honeywell HPA4300B185$34$38
Winix T810259$47$25
Winix AT40272$49$23
Wozoyo Pure Air PA6373$68$4

02 / How to read it

How to read an ENERGY STAR purifier

  1. Room size first. AHAM certifies the room size from CADR. ENERGY STAR does not say how fast a purifier cleans. A small one that is cheap to run will not keep up in a big room.
  2. kWh a year is the number to compare. It is ENERGY STAR's certified yearly use. Multiply by your own electric rate for your cost.
  3. Clean air per watt shows efficiency. ENERGY STAR divides CADR (the cubic feet of clean air a purifier makes a minute) by its watts. A higher number cleans more air for each watt.
  4. Filters cost more than power. For most purifiers a year of replacement filters costs as much as or more than a year of electricity. Check the filter price before you buy.

03 / The full list

All 7 ENERGY STAR purifiers we can buy today

All 7 ENERGY STAR purifiers we can buy today: certified room size, yearly kWh, yearly cost, clean air per watt and Amazon price
PurifierRoom (sq ft)kWh a yearCost a yearClean air per wattPriceBuy
Certified for 450+ sq ft
Wozoyo Pure Air PA6 563 373 $68 5.6 $249.99 Buy
Certified for 300 to 449 sq ft
Honeywell HPA4300Bsold by Amazon 354 185 $34 7.4 $158.11 Buy
Winix T810sold by Amazon 418 259 $47 6.1 $175.99 Buy
Winix AT40sold by Amazon 410 272 $49 5.6 $192.57 Buy
Certified for 200 to 299 sq ft
Dreo DR-HAP009ASsold by Amazon 225 159 $29 5.6 $107.93 Buy
Certified for under 200 sq ft
Dreo 338sold by Amazon 178 125 $23 5.5 $59.98 Buy
Wozoyo Pure Air PA2 116 92 $17 5 $67.99 Buy

Room size is AHAM-certified. Yearly kWh and clean air per watt (CADR divided by watts, the Integrated Energy Factor) are ENERGY STAR's certified figures; yearly cost is that figure at 18.19 cents per kWh. Prices read live November 11, 2026.

04 / Questions

Frequently asked

What does ENERGY STAR mean on an air purifier?
ENERGY STAR says certified room air cleaners are "more than 50% more energy-efficient than standard models." It measures this as CADR (the cubic feet of clean air a purifier makes a minute) per watt, called the Integrated Energy Factor. A certified model also has a yearly energy figure on the ENERGY STAR list.
How much does it cost to run an ENERGY STAR air purifier?
The purifiers here use 92 to 373 kWh a year by ENERGY STAR's figure. At the U.S. average of 18.19 cents per kWh, that is $17 to $68 a year. ENERGY STAR says a standard purifier running all the time uses about 394 kWh, about $72 a year at the same rate.
Does ENERGY STAR mean the purifier cleans better?
No. ENERGY STAR measures power used for the air cleaned. How fast a purifier cleans a room is its CADR, which AHAM certifies. Pick the room size first, then the lowest power use.
Do ENERGY STAR purifiers make ozone?
ENERGY STAR lists an ozone figure for each model. Every pick here is also on the California Air Resources Board list of tested air cleaners.
Which ENERGY STAR purifier is cheapest to run?
By ENERGY STAR's yearly figure, the lowest here is Wozoyo Pure Air PA2 at 92 kWh. It is also the smallest, so match the room first.

References

Sources

6 references · prices on November 11, 2026
  1. 1

    ENERGY STAR: Air Purifiers and Cleaners, Room

    Read November 2, 2026. Certified models are "more than 50% more energy-efficient than standard models." "A standard room air cleaner, operating continuously, uses approximately 394 kWh per year in electricity."

  2. 2

    ENERGY STAR certified room air cleaners (data.energystar.gov)

    Yearly energy use, Integrated Energy Factor, certified room size and ozone for every model on this page. Pulled October 18, 2026.

  3. 3

    U.S. EIA: Electric Power Monthly, Table 5.6.B, average residential price of electricity by state

    U.S. average 18.19 cents per kWh, Year-to-Date through July 2026.

  4. 4

    AHAM Verifide directory of certified room air cleaners

    Smoke CADR and certified room size for every purifier on this page.

  5. 5

    California Air Resources Board: list of CARB-certified air cleaning devices

    Read October 20, 2026. Certification covers ozone (0.050 ppm limit) and electrical safety, not cleaning performance.

  6. 6

    Amazon listings: price, seller and stock

    Read live on November 11, 2026. A price shows only if the listing could be bought that day.