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Ventilation: how much air a room actually needs
Ventilation: how much air a room actually needs: the CO2 number people now measure and cannot interpret, done properly: litres per second per person, air…
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
The CO2 number people now measure and cannot interpret, done properly: litres per second per person, air changes per hour, and what 800 / 1200 / 2000 ppm means, with a calculator that takes room size, occupancy and window type and returns how long to air out.
One page per room and situation: bedroom with the door shut, nursery, home office, classroom, meeting room, gym corner, kitchen extraction, bathroom extraction, a flat with only exhaust ventilation, a house with heat recovery, a passive-house winter, an old stove-vented flat. Includes filter classes for supply air and why a "CO2" sensor under €30 is usually not measuring CO2 at all.
How to use it
Use Ventilation: how much air a room actually needs 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 | õhuvahetus korteris norm |
| Finnish | ilmanvaihto asunnossa riittävä |
| Russian | норма co2 в комнате ppm |
| English | how many air changes per hour bedroom |
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: EN 16798-1 indoor-environment categories and Finnish Asumisterveysasetus 545/2015 (facts cited), WHO Housing and Health Guidelines 2018; the calculators 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
/more/home has a single CO2 ventilation calculator; this is the rate reference and the per-room guidance behind it.
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
the apex sleep calculator (bedroom air) and /more/home.
Frequently asked questions
What does this guide cover?
The CO2 number people now measure and cannot interpret, done properly: litres per second per person, air changes per hour, and what 800 / 1200 / 2000 ppm means, with a calculator that takes room size, occupancy and window type and returns how long to air out. One page per room and situation: bedroom with the door shut, nursery, home office, classroom, meeting room, gym corner, kitchen extraction, bathroom extraction, a flat with only exhaust ventilation, a house with heat recovery, a passive-house winter, an old…
What evidence does it use?
EN 16798-1 indoor-environment categories and Finnish Asumisterveysasetus 545/2015 (facts cited), WHO Housing and Health Guidelines 2018; the calculators computed.
Where does this guide stop?
/more/home has a single CO2 ventilation calculator; this is the rate reference and the per-room guidance behind it.
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.