Sweden AFS 2023:12 — Time-Weighted Heat Index (Work in Intense Heat) — Heat Stress Work/Rest Limits

Sweden Arbetsmiljöverket AFS 2023:12 (Kap. 5 §§19–22, Bilaga 1) time-weighted heat index (WBGT). Binding föreskrift. Maximum permitted WBGT by activity class and heat-acclimatization status; the employer must ensure no work is performed once the maximum is exceeded. Table carried forward from the predecessor AFS 1997:2.

Open Sweden AFS 2023:12 — Time-Weighted Heat Index (Work in Intense Heat) in the interactive Guidance Wiki →

Authority: Arbetsmiljöverket (Swedish Work Environment Authority)
Jurisdiction: Sweden
Legal status: Regulation
Rule type: Schedule Engine
Standard ID: HGC-082

Governing formula

No standalone formula is published for this standard; see programmable logic and parameters below.

Work/rest limits

Acclimatized workers

WBGT (°C)	Light 180 W	Moderate 300 W	Heavy 415 W	Very heavy 520 W
24	60 / 0 min work/rest per hr	60 / 0 min work/rest per hr	60 / 0 min work/rest per hr	60 / 0 min work/rest per hr
25	60 / 0 min work/rest per hr	60 / 0 min work/rest per hr	60 / 0 min work/rest per hr	60 / 0 min work/rest per hr
26	60 / 0 min work/rest per hr	60 / 0 min work/rest per hr	60 / 0 min work/rest per hr	Stop work
27	60 / 0 min work/rest per hr	60 / 0 min work/rest per hr	Stop work	Stop work
28	60 / 0 min work/rest per hr	60 / 0 min work/rest per hr	Stop work	Stop work
29	60 / 0 min work/rest per hr	Stop work	Stop work	Stop work
30	60 / 0 min work/rest per hr	Stop work	Stop work	Stop work
31	Stop work	Stop work	Stop work	Stop work
32	Stop work	Stop work	Stop work	Stop work
33	Stop work	Stop work	Stop work	Stop work
34	Stop work	Stop work	Stop work	Stop work
35	Stop work	Stop work	Stop work	Stop work
36	Stop work	Stop work	Stop work	Stop work

Unacclimatized workers

WBGT (°C)	Light 180 W	Moderate 300 W	Heavy 415 W	Very heavy 520 W
24	60 / 0 min work/rest per hr	60 / 0 min work/rest per hr	Stop work	Stop work
25	60 / 0 min work/rest per hr	60 / 0 min work/rest per hr	Stop work	Stop work
26	60 / 0 min work/rest per hr	60 / 0 min work/rest per hr	Stop work	Stop work
27	60 / 0 min work/rest per hr	Stop work	Stop work	Stop work
28	60 / 0 min work/rest per hr	Stop work	Stop work	Stop work
29	60 / 0 min work/rest per hr	Stop work	Stop work	Stop work
30	Stop work	Stop work	Stop work	Stop work
31	Stop work	Stop work	Stop work	Stop work
32	Stop work	Stop work	Stop work	Stop work
33	Stop work	Stop work	Stop work	Stop work
34	Stop work	Stop work	Stop work	Stop work
35	Stop work	Stop work	Stop work	Stop work
36	Stop work	Stop work	Stop work	Stop work

Inputs

Required inputs: wbgtC, workload

Optional inputs: acclimatization

Sources

🇸🇪 Sweden Arbetsmiljöverket AFS 2023:12 — Work in intense heat (time-weighted heat index) — Arbetsmiljöverket (Swedish Work Environment Authority) (official)

Update history

2026-06-30 · Added to the calculator
This standard was added to the calculator.