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What is in the air indoors
What is in the air indoors: a pollutant-by-pollutant reference with the numbers people can act on: fine particles, NO2, formaldehyde, benzene, ozone, VOCs…
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
A pollutant-by-pollutant reference with the numbers people can act on: fine particles, NO2, formaldehyde, benzene, ozone, VOCs and their household sources, each with the WHO guideline value, the typical indoor level from published surveys, and the three interventions ranked by effect.
One page per activity that changes the number: frying, toasting, a gas hob, a wood stove light-up, candles, incense, a vacuum without a good filter, hairspray, 3D printing, a laser printer, an ozone "steriliser", opening a window on a smoggy day, and one per season. Twenty-plus item pages, all computed against published measurements rather than invented.
How to use it
Use What is in the air indoors 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 | siseõhu kvaliteet mõõtmine |
| Finnish | sisäilman pienhiukkaset |
| Russian | качество воздуха в квартире pm2.5 |
| English | does cooking raise indoor pm2.5 |
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: WHO Global Air Quality Guidelines 2021 and WHO IAQ: Selected Pollutants 2010 (public), Health Canada residential IAQ guidelines (open), peer-reviewed cooking-emission studies (cited). · 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
the taken air-quality boards report outdoor monitoring stations; this is the indoor side and its sources.
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/lungs and the apex heart-rate zone pages (exercising indoors).
Frequently asked questions
What does this guide cover?
A pollutant-by-pollutant reference with the numbers people can act on: fine particles, NO2, formaldehyde, benzene, ozone, VOCs and their household sources, each with the WHO guideline value, the typical indoor level from published surveys, and the three interventions ranked by effect. One page per activity that changes the number: frying, toasting, a gas hob, a wood stove light-up, candles, incense, a vacuum without a good filter, hairspray, 3D printing, a laser printer, an ozone "steriliser", opening a window on…
What evidence does it use?
WHO Global Air Quality Guidelines 2021 and WHO IAQ: Selected Pollutants 2010 (public), Health Canada residential IAQ guidelines (open), peer-reviewed cooking-emission studies (cited).
Where does this guide stop?
the taken air-quality boards report outdoor monitoring stations; this is the indoor side and its sources.
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.