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Office and desk chairs
Office and desk chairs: "Ergonomic" is not a defined term but EN 1335 type A/B/C is, and the display-screen-equipment directive sets the adjustability an…
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
"Ergonomic" is not a defined term but EN 1335 type A/B/C is, and the display-screen-equipment directive sets the adjustability an employer legally owes — those two facts turn a shopping page into a reference.
Item pages rank the adjustments that matter in order, measure the buyer for seat height and depth, compare mesh against foam, explain gas-lift classes and how they fail, castors for hard floors, chairs rated for tall, short and heavier users, kneeling and saddle chairs against the trial evidence, kids' and student chairs, gaming chairs, and what wears out on a used office chair. ~14 pages.
How to use it
Use Office and desk chairs 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 | kontoritool kuidas valida |
| Finnish | työtuolin valinta |
| Russian | как выбрать офисное кресло |
| English | what does EN 1335 mean on an office chair |
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 1335-1/-2 scope abstracts, Council Directive 90/270/EEC (EUR-Lex, reusable), published sitting-posture and back-pain trials (cited); measurement guidance own writing. · 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
/ergo calculates desk, monitor and chair heights for the setup you have; this is which chair to buy and what its spec sheet claims.
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.
Backpain
Continue to the related TempoLife reference.
Workplace
Continue to the related TempoLife reference.
Why it belongs on TempoLife
/ergo, /backpain, /workplace.
Frequently asked questions
What does this guide cover?
"Ergonomic" is not a defined term but EN 1335 type A/B/C is, and the display-screen-equipment directive sets the adjustability an employer legally owes — those two facts turn a shopping page into a reference. Item pages rank the adjustments that matter in order, measure the buyer for seat height and depth, compare mesh against foam, explain gas-lift classes and how they fail, castors for hard floors, chairs rated for tall, short and heavier users, kneeling and saddle chairs against the trial evidence, kids' and…
What evidence does it use?
EN 1335-1/-2 scope abstracts, Council Directive 90/270/EEC (EUR-Lex, reusable), published sitting-posture and back-pain trials (cited); measurement guidance own writing.
Where does this guide stop?
/ergo calculates desk, monitor and chair heights for the setup you have; this is which chair to buy and what its spec sheet claims.
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