TempoLife › Features › Air cleaners: the sizing arithmetic
Air cleaners: the sizing arithmetic
Air cleaners: the sizing arithmetic: every air-purifier page online is an affiliate list; nobody publishes the arithmetic. This is a CADR-to-room calculator…
This launch guide maps the topic, the source base and the practical questions. Check the linked official authority before acting on a rule, deadline, price or safety requirement.
What this guide covers
Every air-purifier page online is an affiliate list; nobody publishes the arithmetic. This is a CADR-to-room calculator (clean-air delivery rate times sixty, over room volume, equals air changes per hour), a page per room size from 8 m2 to 60 m2 saying what CADR is needed for two, four and five air changes, and a page per filter class explaining HEPA E10-H14, ISO 16890 and MERV against what they actually stop.
Also the honest negatives: ozone generators, ionisers, "UV sterilisation" claims, plasma, and a costed DIY box- fan-plus-filter build with the measured performance from published tests.
How to use it
Use Air cleaners: the sizing arithmetic to understand the inputs, units and assumptions before relying on an output. A useful result should be reproducible from the named source rather than presented as an unexplained score.
The page keeps the main question, its evidence base and its limits together in one canonical place. That makes it useful as a quick orientation and avoids splitting a broad subject into shallow pages before each narrower answer has enough verified material of its own.
Search vocabulary in four languages
Terminology changes across borders. These are example phrases people use for the same subject in Estonian, Finnish, Russian and English; they are included as a practical vocabulary aid, not as hidden keywords.
| Language | Example phrase |
|---|---|
| Estonian | õhupuhasti kui suur ruumi |
| Finnish | ilmanpuhdistin riittävä teho |
| Russian | как выбрать очиститель воздуха по площади |
| English | cadr to air changes calculator |
Evidence and provenance
The evidence map below records the primary, official or openly licensed material chosen for this guide. It is deliberately visible so a reader can tell the difference between a rule published by an authority, a measured dataset and an editorial explanation.
Source: AHAM AC-1 CADR method and CARB certified air-cleaner list (public), ISO 16890 and EN 1822 class definitions (facts cited); sizing computed. · checked 2026-09-09
Source names are preserved even where an authority changes its web address. No figure is added to this launch page unless it is already present in the cited source description or can be computed from a named dataset.
Scope and boundaries
/indoorair is the pollutants; this is the device and the maths.
Connected TempoLife guides
The following paths are the intentional hand-offs named in the brief. They keep adjacent subjects separate while making the next useful reference easy to find.
Why it belongs on TempoLife
/more/allergy and the apex sleep calculator.
Frequently asked questions
What does this guide cover?
Every air-purifier page online is an affiliate list; nobody publishes the arithmetic. This is a CADR-to-room calculator (clean-air delivery rate times sixty, over room volume, equals air changes per hour), a page per room size from 8 m2 to 60 m2 saying what CADR is needed for two, four and five air changes, and a page per filter class explaining HEPA E10-H14, ISO 16890 and MERV against what they actually stop. Also the honest negatives: ozone generators, ionisers, "UV sterilisation" claims, plasma, and a costed…
What evidence does it use?
AHAM AC-1 CADR method and CARB certified air-cleaner list (public), ISO 16890 and EN 1822 class definitions (facts cited); sizing computed.
Where does this guide stop?
/indoorair is the pollutants; this is the device and the maths.
Turn the reference into a routine
TempoLife brings food, movement, sleep and everyday health habits into one private place when you want to track what happens next.