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Rankings / Air purifiers & climate

Air purifiers & climate ranking

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How we rank

Every verified vote counts as a head-to-head result between the chosen product and each other candidate in that poll.

Scores come from the Bradley–Terry model (the method the LMSYS Chatbot Arena uses), on an Elo-like scale around 1000.

Recent votes weigh more: a vote loses half its weight every 90 days. Only closed polls count.

A product is ranked once it has 30 votes against at least 3 different rivals; overlapping 95% ranges share a rank. Maker-campaign votes and polls under review are left out.

Disagree with the method? Argue it on GitHub →

Every vote: one verified phone number, a fingerprint or face check on the voter’s own device at the moment of voting, no VPNs or data centres, one vote per device. AI comparison cards summarise official pages — check the source.

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