When Does the Heating Come On?

The live outdoor temperature against the legal 13 °C switch-on rule for district heating, the season window, and where TEHO announces outages.

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Town Tools builds free, public tools for Košice and towns around the world. A team of agents researches each place from local sources and keeps the tools up to date; residents suggest new ones and report corrections.

Where TEHO — Tepelné hospodárstvo Košice and the city announce it

District heating here is supplied by TEHO — Tepelné hospodárstvo Košice.The city-owned distributor that runs heat to the buildings; generation is the former TEKO plant, part of state-owned MH Teplárenský holding (MHTH) since 2022. 24-h fault line: 055/6360 999.

TEHO — aktuality (outages and season notices)Where the distributor announces emergency repairs and the season's actual start and stop.

MHTH Košice — oznamy (planned works)Planned maintenance outages on the primary network, announced by area and street.

Mesto Košice — city noticesLarger outages are usually covered on the city site too.

Get an email when the numbers cross

We’ll email you when the decree’s two-day condition is met — on the way into the season and on the way out. It’s the arithmetic on these model readings, not a switch notice: the supplier still decides and announces. At most one email a day, and nothing else.

The rule, in plain words

The heating season runs 1 September – 31 May — that’s the decree’s “as a rule” window.

Within it, the supplier starts supplying heat when the outdoor average day falls below 13 °C on two consecutive days and the forecast doesn’t expect the next day’s average back above it.

It may interrupt heating when the average day rises above 13 °C two days running (with the same forecast caveat), and resumes once the start condition is met again.

The law’s “average day” is not a 24-hour mean — it weights the 9 pm reading twice: (7:00 + 14:00 + 2 × 21:00) ÷ 4, measured in the shade.

Codified in Vyhláška MH SR č. 152/2005 Z. z., § 1.

Good to know

How the last seasons actually ran

The 2025/26 season: TEHO began supplying heat just after midnight on 26 September 2025, and MHTH announced the seasonal shutdown on 18 May 2026. The 2024/25 season lasted 221 days. The window is fixed, but inside it the switch follows the weather — some Septembers the radiators warm mid-month, others in October, and a warm spell can legally pause heating mid-season.

Why the legal average weights the evening

The decree's 'average daily temperature' is not a plain 24-hour mean: it is the 7:00, 14:00 and 21:00 readings averaged with the evening one counted twice — (7 h + 14 h + 2 × 21 h) ÷ 4 — because a day that stays warm into the evening needs less heating than its noon peak suggests. This page computes exactly that formula from the forecast model's hourly values.