What Room & Filter provides

Guides that size a purifier from the published EPA minimum CADR for the room, with no coverage claims and no invented figures.

• Every minimum comes from the six published EPA rows, quoted verbatim with the retrieval date on the page.
• Where the dataset has no answer, the page says so: there is no published CADR for gases, odours or VOCs.
• Category suggestions only, never per-model verdicts or prices.

An instant room-size lookup that reads the same published table the guides quote.

• Type a room size, get the published minimum, rounded up to the larger row when a room sits between two published sizes.
• No interpolation, no extrapolation past 600 sq ft, and every refusal says why in plain text.
• The tool and the pages read one dataset, so they never disagree.

Comparisons built from published rows only, so the table holds exactly what the sources hold.

• Published figures side by side, each row carrying its citation.
• Where nothing comparable is published, the table says so instead of estimating.
• A filled suggestion once per screen, and the answer comes before the commerce.

Readers write in with a room and a question, and the answer comes from the same published rows.

• Send your room size and what you are trying to remove; the reply uses the published minimum for that area.
• If the table has no figure for the case, the reply says so rather than inventing one.
• Free, read by a human, and corrections get answered, not archived.