How FreshAirReview makes recommendations
We're a synthesis publication, not a testing lab. We don't run first-party 90-day trials on every air purifier, humidifier, or dehumidifier we cover. What we have is a methodology for systematically reading what the people who DO have those things have published, weighting their findings through a transparent framework, and presenting the synthesis with the limits explicitly stated.
We don't run a lab
FreshAirReview is a synthesis publication. We don't have calibrated chamber equipment, Airthings View Plus and Awair Element monitors running across multiple test bedrooms, or 1,920-unit-hour test cycles. What we have is a methodology for systematically reading what the people who DO have those things have published (RTINGS' chamber measurements, HouseFresh and AirPurifierFirst independent reviews, AHAM CADR certification database, EPA and Energy Star databases, verified owner reports at scale), weighting those findings through a transparent framework, and presenting the synthesis with the limits stated.
What we do verify directly: manufacturer specifications, current pricing pages, AHAM CADR certifications (publicly verifiable), EPA Energy Star ratings (publicly verifiable), and convergent owner-report patterns from accounts with established posting history. What we don't claim: that we have personally logged 1,920 unit-hours across 8 purifiers during peak Spring 2026 pollen season, measured filter degradation with a manometer at the intake, or run a calibrated SPL meter at 3 ft against each unit.
Our source stack
For each product we cover, we draw on:
- RTINGS' chamber measurements for CADR and calibrated SPL (dB) readings, where RTINGS has tested the specific unit
- HouseFresh and AirPurifierFirst independent reviews for unit-specific lab and real-room testing
- AHAM CADR certification database for smoke, dust, and pollen CADR ratings (publicly verifiable)
- EPA Energy Star database for energy consumption ratings and ozone-emission certifications (publicly verifiable)
- Manufacturer product documentation, spec sheets, and pricing pages (verified as current at the article's "Last updated" date)
- Verified-purchase owner reports from Amazon, Best Buy, and Home Depot, filtered for accounts with 6+ months of ownership and established posting history (sample ≥50 per unit where available)
- Aged-account community sources: r/airpurifiers, r/HVAC, r/HomeImprovement, r/allergies, filtered for 1+ year of platform participation
- Building-science trade press: ASHRAE Journal, Indoor Air journal, EPA IAQ publications
Where manufacturer claims and independent chamber data diverge, we report both and explain how we weighted the divergence in the final scoring. Where chamber data and owner reports diverge, we report both: chamber data describes engineering capability; owner reports describe real-room performance with door cracks, kid traffic, and the cat that sleeps on top of the unit.
Our 5-criteria weighted framework
Every platform is scored across five weighted criteria:
For FreshAirReview specifically, we apply a hard ozone gate: any product that produces detectable ozone at consumer-use levels (whether via intentional ionization, PCO, or as a byproduct of UV-C) is flagged as non-recommended regardless of other criteria. Ozone is a respiratory irritant per EPA guidance; this is non-negotiable.
What we won't claim
- We won't claim first-party hands-on testing we haven't done.
- We won't claim calibrated chamber measurements we haven't recorded.
- We won't attribute a number to a source (RTINGS, AHAM, EPA, HouseFresh) that doesn't actually contain that number. If we can't verify the source, we drop the specific value and use a categorical claim.
- We won't quote retail prices we can't verify against the manufacturer's current published pricing page.
- We won't recommend a product with an affiliate program over an equivalent product without one, when the evaluation criteria are equal. Ties are broken on the lower commission.
- We won't omit eliminations from our shortlist; if a product was considered and rejected on substance, we name it and explain why.
- We won't allow vendors to review articles before publication.
- We won't invent anonymized expert quotes. Where we attribute a perspective, it traces to a real verifiable source.
How affiliate revenue works at FreshAirReview
FreshAirReview earns commission when readers click affiliate links and complete a purchase (Amazon Associates, vendor-direct programs). Affiliate relationships do not influence our rankings. We score the job, not the payout. When a vendor's product is the wrong recommendation for a home profile, we say so even if we have an affiliate relationship with that vendor.
Independence policy:
- Affiliate commission rates have no bearing on scoring or ranking.
- Where two products would otherwise rank identically, ties are broken on the lower commission.
- We do not accept paid sponsorships, vendor-paid placements, or "sponsored content."
- We do not allow vendors to review articles before publication.
Update cadence
- Pricing changes monitored monthly; articles updated within 30 days of detected change.
- Filter availability changes tracked quarterly (consumable supply chain matters for ownership cost).
- Recall or safety notices (CPSC, EPA ozone-emission flags) trigger article updates within 48 hours.
Editorial corrections and feedback
Errors are corrected in-line with a visible (Updated: YYYY-MM-DD) note. Substantive corrections are logged on our corrections page.
Found an error or want to flag a missing consideration? Email corrections@freshairreview.com with the article URL and a brief description.