Between the hours of 11pm and 6pm, tenants in accomodation owned by Vonovia will be restricted to a maximum heating temperature of 17 degrees (centigrade). Modifications will be made shortly to the heating systems of tenants. The move is intended to cut costs due to rising gas prices in Germany which is heavily reliant on Russia to provide its natural gas. I remember this being tried where I live last winter and there was huge protest from elederly tenants who need to be warm at all times of the day. The heating was restored to normal.