About this site

AirFilterKits.com is an independent publication about home air filtration. We sell nothing and stock nothing — the job is explaining sizes, ratings, schedules and DIY builds accurately enough that you buy or build once, correctly.

Why it exists

Most filter information online is written by companies selling filters, which produces predictable distortions: every page concludes you need the premium tier, replacement intervals shrink to whatever sells more units, and the genuinely remarkable budget option — the Corsi-Rosenthal box, with peer-reviewed performance data — gets ignored because nobody profits from a roll of tape. An independent reference fixes the incentive: our recommendations can afford to be cheap when cheap is correct.

Editorial policy

Performance claims cite their tests. Any number about how well something cleans air — CADR figures, MERV capture rates — traces to a published study, standard, or test report, named on the page. If no credible test exists, we say "untested" instead of guessing.

Recommendations are reasoned in the open. Where we recommend (a MERV level, a build spec, a buying pattern), the trade-off logic is on the page so you can disagree with the reasoning, not just the conclusion.

Dated verification. Every guide carries a "verified" date — when its facts were last checked against sources, not just when prose was edited.

Corrections are visible. Confirmed errors get fixed with a note, not silently. Spotted one? corrections@airfilterkits.com.

No medical advice. Air quality intersects with health; we explain filtration, and we say plainly when a question belongs to your clinician.

How the site is funded

Advertising (Google AdSense) and clearly labeled affiliate links — including Amazon Associates and filter-subscription referral programs. The wall between revenue and content: no brand pays for placement, no affiliate relationship changes a recommendation, and any section containing affiliate links is labeled where the links appear. The full statement is on the disclosures page.

Update rhythm

Filtration facts move slower than tax rates, but they move: new test publications, filter standard revisions, and product-category shifts (PC-fan builds maturing, for example). Guides are reviewed seasonally, and the wildfire playbook is checked ahead of each North American fire season.

AirFilterKits.com is not affiliated with any filter manufacturer, retailer, or standards body.