Air Purifiers: AI Market Discovery Index
Tracking how AI platforms recommend air purifiers. This public AI Market Discovery Index is updated monthly since July 2026.
On this page
- 01Benchmark Summary
- 02Current Benchmark at a Glance
- 03Research Scope and Qualification
- 04Current Brand Standings
- 05How to Read the Standings
- 06Recommendation Coverage Movement
- 07Largest Increase: IQAir
- 08Largest Decline: Dyson
- 09Largest Decline: Molekule
- 10Category Leader: Levoit
- 11Recommendation Placement Snapshot
- 12Buyer-Intent Distribution
Benchmark Summary
Levoit led the Air Purifiers benchmark in September 2026 with 82.8% valid recommendation coverage, ahead of Coway's 73.1% by 9.7 percentage points. The largest coverage increase was IQAir, rising to 45.8% in September 2026 from 35.0% in July 2026. The largest coverage decline was Dyson, falling to 11.5% in September 2026 from 24.6% in July 2026.
This was a month with mixed movement. Dyson's coverage decline moved beyond normal month-to-month variation, continuing its slide from August. Molekule also continued to decline, though its September month-over-month move stayed within normal variation; across the full three-month series, Molekule's cumulative decline moved beyond normal variation. IQAir's 5.3-point rise to 45.8% in September 2026 from 40.5% in August 2026 was the largest upward move but remained within normal variation. Category leader Levoit was stable, down 1.6 percentage points from 84.4% in August 2026.
Across the full three-month series, IQAir gained 10.8 percentage points, moving beyond normal variation. Dyson declined in each of the two months since July 2026, and Molekule also declined in each of the two months since July 2026.
The benchmark began with 800 prompt-surface observations in July 2026, 700 in August 2026, and 800 in September 2026, producing 615, 546, and 598 qualified observations respectively.
AI recommendation trend
valid recommendation coverage, Jul 2026 to Sep 2026
- Levoit82.8%
- Coway73.1%
- Blueair62.7%
- IQAir45.8%
- Winix39.8%
- Rabbit Air23.9%
- Austin Air20.4%
- Dyson11.5%
- Honeywell10.2%
- Molekule1.0%
Current Benchmark at a Glance
Measure | Jul 2026 | Sep 2026 | Movement |
|---|---|---|---|
Qualified benchmark observations | 615 | 598 | Down 17 |
Tracked brands | 10 | 10 | No change |
Qualified surface breadth | 6 | 6 | No change |
Recommendation-shaped answer share | 63.7% | 61.2% | Down 2.5 points |
Valid recommendation shortlist share | 90.2% | 90.3% | Up 0.1 points |
Leader by valid recommendation coverage | Levoit | Levoit | No change |
Qualified surface breadth counts the canonical AI/search surface families with at least one qualified observation: ChatGPT, Copilot, Gemini, Perplexity, AI Overviews, and AI Mode. Breadth returned to six in September 2026 after ChatGPT was absent from the qualified observations in August 2026.
For the strategic interpretation of this benchmark, read CiteWorks Studio's analysis of How AI Search Is Recommending Air Purifiers
Research Scope and Qualification
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The public benchmark is narrower than the raw collection universe by design.
Research stage | Jul 2026 | Sep 2026 | What it represents |
|---|---|---|---|
Source prompt-surface observations | 800 | 800 | Total prompts collected across surfaces |
Unique questions | 504 | 545 | Distinct questions after deduplication |
Brand / competitor mentions | 800 | 800 | Prompts mentioning a tracked brand |
Relevant observations | 787 | 786 | On-topic for the vertical |
Irrelevant observations | 13 | 14 | Off-topic or unusable |
Qualified benchmark observations | 615 | 598 | Public denominator for percentages |
Brand-level percentages use the qualified observations as the public denominator, not the raw collection. See the AI Market Discovery Methodology for details.
Current Brand Standings
Sorted by valid recommendation coverage in September 2026.
Brand | Presence rate | Valid recommendation coverage | Top-three rate | Rank-one rate | Net sentiment |
|---|---|---|---|---|---|
Levoit | 92.8% | 82.8% | 64.9% | 27.1% | 0.9 |
Coway | 82.9% | 73.1% | 59.4% | 22.2% | 0.9 |
Blueair | 71.9% | 62.7% | 41.5% | 14.9% | 0.9 |
IQAir | 53.7% | 45.8% | 21.4% | 8.0% | 0.9 |
Winix | 49.5% | 39.8% | 14.4% | 1.7% | 0.9 |
Rabbit Air | 28.4% | 23.9% | 12.4% | 3.2% | 0.9 |
Austin Air | 23.6% | 20.4% | 11.2% | 4.3% | 0.9 |
Dyson | 20.1% | 11.5% | 4.2% | 0.2% | 0.6 |
Honeywell | 17.2% | 10.2% | 4.9% | 0.8% | 0.7 |
Molekule | 3.0% | 1.0% | 0.0% | 0.0% | 0.2 |
How to Read the Standings
- Presence rate: Share of qualified observations where the brand is mentioned.
- Valid recommendation coverage: Share of qualified observations where the brand appears in a valid recommendation shortlist.
- Top-three rate: Share of qualified observations where the brand is recommended in the top three slots.
- Rank-one rate: Share of qualified observations where the brand is the first recommendation.
- Net sentiment: Positive minus negative sentiment divided by total mentions, on a -1 to 1 scale.
For formulas and denominator rules, see AI Market Discovery Metric Definitions.
Recommendation Coverage Movement
Brand | Jul 2026 | Sep 2026 | Movement since baseline |
|---|---|---|---|
Levoit | 85.7% | 82.8% | Down 2.9 points |
Coway | 70.2% | 73.1% | Up 2.9 points |
Blueair | 64.5% | 62.7% | Down 1.8 points |
IQAir | 35.0% | 45.8% | Up 10.8 points |
Winix | 42.6% | 39.8% | Down 2.8 points |
Rabbit Air | 25.5% | 23.9% | Down 1.6 points |
Austin Air | 23.4% | 20.4% | Down 3.0 points |
Dyson | 24.6% | 11.5% | Down 13.1 points |
Honeywell | 12.8% | 10.2% | Down 2.6 points |
Molekule | 2.9% | 1.0% | Down 1.9 points |
Largest Increase: IQAir
IQAir's valid recommendation coverage rose by 10.8 percentage points across the three-month series, moving beyond normal variation. The brand rose in each of the two months since July 2026, reaching 40.5% in August 2026 before rising another 5.3 points to 45.8% in September 2026, a month-over-month move that remained within normal variation. Presence rate climbed to 53.7% in September 2026 from 40.6% in July 2026.
Largest Decline: Dyson
Dyson's valid recommendation coverage fell by 13.1 percentage points across the three-month series, moving beyond normal variation. The brand declined in each of the two months since July 2026: down 5.2 points to 19.4% in August 2026, then down another 7.9 points to 11.5% in September 2026, a month-over-month decline that also moved beyond normal variation. Presence rate fell to 20.1% in September 2026 from 34.6% in July 2026, and top-three rate declined to 4.2% from 7.6% in the same period.
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Largest Decline: Molekule
Molekule also registered a decline beyond normal variation. Valid recommendation coverage fell to 1.0% in September 2026 from 2.9% in July 2026, a drop of 1.9 percentage points. The brand declined in each of the two months since July 2026. Presence rate fell to 3.0% in September 2026 from 5.5% in July 2026, and top-three rate declined to 0.0% from 1.0%. The brand is now at the bottom of the category on every measured dimension.
Category Leader: Levoit
Levoit remained the category leader in September 2026 with 82.8% valid recommendation coverage, down 2.9 percentage points from 85.7% in July 2026 but within normal variation for the primary metric. Levoit's top-three rate of 64.9% and rank-one rate of 27.1% were the highest in the category, even as its rank-one rate fell from 34.8% in July 2026.
The remaining brands were stable on the primary metric. Coway rose 2.9 points from 70.2% in July 2026 to 73.1% in September 2026; its top-three rate also rose, from 52.8% to 59.4%. Blueair's rank-one rate rose to 14.9% in September 2026 from 10.2% in July 2026. Austin Air, Honeywell, Rabbit Air, and Winix showed movement within normal variation on the primary metric.
Recommendation Placement Snapshot
Coverage alone does not show how prominently a brand is recommended. Levoit's rank-one rate fell from 34.8% to 27.1% from July to September 2026 even as it maintained category-leading coverage.
Brand | Sep 2026 top-three rate | Sep 2026 rank-one rate | Jul 2026 top-three rate | Jul 2026 rank-one rate |
|---|---|---|---|---|
Levoit | 64.9% | 27.1% | 68.8% | 34.8% |
Coway | 59.4% | 22.2% | 52.8% | 19.4% |
Blueair | 41.5% | 14.9% | 41.8% | 10.2% |
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Coway improved both its top-three and rank-one rates from July 2026 to September 2026, and Blueair's first-position rate rose from 10.2% to 14.9% even as its top-three rate was essentially unchanged. Levoit's first-position rate declined from 34.8% to 27.1% in the same period. Close coverage can still hide different first-position rates.
Buyer-Intent Distribution
All qualified observations in both months fell into the Brand Recommendation class.
Buyer-intent class | Jul 2026 | Sep 2026 |
|---|---|---|
Brand Recommendation | 615 | 598 |
Pricing & Value | 0 | 0 |
Multi-Brand Comparison | 0 | 0 |
Total qualified observations | 615 | 598 |
The current public series cannot answer pricing, value, or head-to-head comparison questions.
Historical Measurement Record
This is an evergreen benchmark URL. New measurements are added to the same report.
Measurement | Qualified observations | Coverage leader | Leader coverage | Largest coverage movement |
|---|---|---|---|---|
Jul 2026 | 615 | Levoit | 85.7% | Baseline month |
Aug 2026 | 546 | Levoit | 84.4% | Dyson down 5.2 points |
Sep 2026 | 598 | Levoit | 82.8% | Dyson down 7.9 points |
Evidence and Source Layer
The benchmark is built from prompt-level observations that retain the query, AI/search surface, answer, brand outcome, recommendation placement, sentiment, and, where exposed, citations or attributable evidence sources. Source presence is evidence about the information environment. It is not automatically proof that the source caused the recommendation.
Scope Boundaries
This public benchmark does not measure:
- Market share or sales attributable to AI recommendations
- Every possible AI response, only the qualified observations in the collection
- Organic-search ranking or social mention volume
- Private or sponsored channels
- Causality from a metric movement alone
About This Benchmark
The LLM Authority Index AI Market Discovery Index tracks how AI assistants and search surfaces discover and recommend brands in a given vertical. The benchmark measures presence, recommendation coverage, placement, and sentiment across six canonical AI surface families.
- AI Market Discovery Methodology
- AI Market Discovery Metric Definitions
- AI Market Discovery Research Standards
- Modeled AI Authority Value
Get a Company-Level Authority Index
The public industry benchmark shows category-level standings. A company-level Authority Index can go deeper. The public percentage cannot identify the prompts, competitors, or sources causing the result.
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