Is the Winix C710 worth it?
Room air purifier · suggested up to 384 sq ft · True HEPA (H13) + activated carbon
Winix AT40 on Amazon · $185.64 →Our pick: the C710’s twin, with 2 years of filters in the box. Affiliate link.
Yes, for a room up to 384 sq ft. But it isn't sold on Amazon, so buy the Winix AT40 there: same filter, same 45 watts, a higher smoke rating, and two years of filters in the box.
Winix C710 review
The short answer
Yes. The Winix C710 is worth it for a room up to 384 sq ft, but if you shop on Amazon, buy the Winix AT40 instead. The C710 isn't sold on Amazon. The AT40 uses the same Filter Z and the same 45 watts, AHAM rates it higher on smoke (265 vs 248), and it comes with two years of filters. It was $185.64 on Amazon on October 17, 2026.
- Winix AT40 on Amazon · $185.64 Our pick: the C710’s twin, with 2 years of filters in the box
- Genuine Filter Z · $49.99 Fits the C710, C610 and AT40; replace every 12 months
- Want the C710 itself? Costco and Winix’s own store sell it. We only link Amazon, so there is no C710 button here.
Prices on Amazon on the review date; they change often. Affiliate links; we earn a commission at no cost to you.
All 25 certified Winix models compared, with prices →
At a glance
Who it's for
A bedroom, office or living room up to about 384 sq ft. For smoke or allergy season, size it for a smaller room so it cleans faster.
The standout number
248 smoke CADR on 45 watts. Even running all day, that is about $74 a year in power.
The catch
It is not on Amazon. The AT40 is the same filter and power with a higher smoke rating, so it is the one to buy there.
The Verified Label — every AHAM-tested spec
ENERGY STAR listed
US market
Clean Air Delivery Rate (CADR) — source: AHAM
Coverage & power — source: AHAM (+ computed)
Filter & identity
How it ranks
Where this unit sits among the 235 room air purifiers we track, on the two numbers that decide one: how fast it clears fine smoke particles, and how big a room it covers. Percentiles are computed from our corpus (higher = better).
Smoke CADR
Better than 75%
of the 235 units with a published smoke CADR
Suggested room size
Better than 75%
of the 235 units with a published room size
The C710 vs its two closest rivals on Amazon
Smoke CADR and room size are AHAM-certified. Quietest setting is the maker's own figure. Filter cost is the genuine filter on Amazon, replaced every 12 months as Winix says. Power cost is running all day on the smoke-test speed at 18.83¢ per kWh. Two-year cost = Amazon price + filters you'd buy + two years of power. Amazon prices on October 17, 2026.
| Unit | Smoke CADR | Room (sq ft) | Quietest (dB) | Filter / yr | Power / yr | 2-year cost | Where |
|---|---|---|---|---|---|---|---|
| Winix C710This page; not on Amazon | 248 | 384 | 22 | $50 | $74 | — | Costco, Winix |
| Winix AT40Same Filter Z; 2 filter sets in the box | 265 | 410 | 22 | $50 | $74 | $334 | $185.64 on Amazon |
| Winix 5520Different filter (Filter Q); not ENERGY STAR | 253 | 392 | 23.5 | $47 | $107 | $442 | $179.99 on Amazon |
The AT40 is the better buy on Amazon: over two years it costs about $108 less than the 5520, mostly because it draws 45 W instead of 65 W and ships with a second filter. The 5520 costs less up front ($179.99 vs $185.64). All three are about as quiet on their lowest speed (22–23.5 dB).
Sources: AHAM Verifide directory: Winix C710, AT40, 5520 · Winix: C710 product page · Winix: AT40 product page · Winix: 5520 product page · Amazon listing: Winix Genuine Replacement Filter Z (Model1712-0121-00) for Winix C610, C710, AT40 Air Puri · Amazon listing: WINIX AT40 Air Purifier with 2 Years of Filters for Extra Large Room Up to 1968 Ft² in 1 H · Amazon listing: WINIX 5520 Air Purifier for Home Large Room Up to 1882 Ft² in 1 Hr With Air Quality Monito · Amazon listing: Genuine Winix Filter Q –1712-0123-00 with Activated Carbon for Odor Control For Winix 5510 · Costco: WINIX C710 4-Stage True HEPA Air Purifier with Wi-Fi and Additional Filter (item 4449587)
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Frequently asked questions
Is the Winix C710 worth it?
Yes for a room up to about 384 sq ft. AHAM certifies 248 smoke CADR on 45 W, and it is ENERGY STAR. It isn't on Amazon, though. There, the AT40 is the same filter and power, rates higher on smoke (265), and ships with two years of filters.
Winix C710 vs AT40: what is the difference?
Very little. Both use Filter Z and draw 45 W, and both are ENERGY STAR. AHAM rates the AT40 a little higher on smoke (265 vs 248) and dust (259 vs 252), and a little lower on pollen (244 vs 262). The AT40 is rated for 410 sq ft vs 384. Winix lists both at 22 dB on the lowest speed. The AT40 is slightly bigger (10.2 lb vs 8.8 lb).
Is the Winix C710 on Amazon?
No. We found no C710 listing on Amazon. Costco lists it (item 4449587), and Winix sells it on its own site. The AT40 is the closest Winix on Amazon.
Winix C710 vs 5520: which is better?
They clear about the same air (248 vs 253 smoke CADR). The C710 draws 45 W vs 65 W and is ENERGY STAR; the 5520 is not. Running all day, that is about $74 vs $107 a year in power. The 5520 uses a different filter (Filter Q, $47.49).
How much does the Winix C710 filter cost?
The genuine Winix Filter Z (part 1712-0121-00) was $49.99 on Amazon on October 17, 2026. Winix says to replace it every 12 months, so plan on about $49.99 a year. The same filter fits the AT40 and C610.
Is the Winix C710 the same as the C610?
Yes, as far as the certificates go. AHAM lists the C610 with the same numbers as the C710 (248 smoke CADR, 384 sq ft, 45 W), and both take Filter Z. The C610 is on Amazon from third-party sellers; the AT40 is sold by Amazon.com, rates higher on smoke and ships with two years of filters.
How loud is the Winix C710?
Winix lists 22 dB on the lowest fan speed, about a whisper. Winix does not publish a figure for high speed, and high is the speed AHAM's room-size rating assumes.
How big a room does the Winix C710 cover?
AHAM suggests it for a room up to 384 square feet. That rating assumes it runs on high and cleans the air about 4.8 times an hour. For faster cleaning — say for wildfire smoke or allergies — size it to a smaller room than the maximum.
What is the CADR of the Winix C710?
Its AHAM Clean Air Delivery Rate is 252 for dust, 248 for smoke and 262 for pollen, with a PM2.5 CADR of 250. CADR is cubic feet of clean air delivered per minute — higher clears a room faster.
Does the Winix C710 use a real HEPA filter?
Its filter is listed as True HEPA (H13) + activated carbon. True HEPA captures 99.97% of particles down to 0.3 microns. The activated-carbon layer also helps with odors and gases.
How much power does the Winix C710 use?
About 45 watts on its smoke-clearing setting, which works out to 5.5 CADR per watt — a measure of how much clean air you get for the electricity it draws. It is ENERGY STAR certified.
Sources. Clean Air Delivery Rate (dust / smoke / pollen), PM2.5 CADR, suggested room size, ENERGY STAR status and power draw come from the AHAM Verifide air-cleaner directory (the industry's independent CADR test). Average CADR, clean-air-per-watt and the percentile figures are computed by Verified HVAC Data from those published ratings. We publish no star ratings and take no payment for placement. "Not published" means AHAM's record doesn't disclose it — we never fill a spec with a guess.
Winix AT40 on Amazon · $185.64 → See how it ranks against every purifier