On 1 September 2022 a federal regulation to secure the energy supply came into force. It applied until 28 February 2023. Work rooms in public buildings could be heated to no more than 19 degrees Celsius for light, mostly seated work.
Shops were not allowed to keep their doors permanently open when heat escaped. Illuminated advertising had to be switched off from 10 p.m. until 4 p.m. the next day.