Finland, Nov. 3 -- YIT has been selected to carry out the excavation contract for Vantaa Energy's heat storage facility, Varanto, in Vantaa. The project is valued at approximately EUR 100 million for YIT. The project will be recorded in YIT's order book for the fourth quarter of 2025. Excavation work will begin in December 2025, and the contract is expected to last around three years. Once completed, Varanto will be the world's largest seasonal heat storage facility, located deep beneath Ring Road III in Kuusikonmaki, Vantaa. The storage capacity will be 90 gigawatt-hours of district heating, equivalent to the annual heating needs of a medium-sized Finnish city. Varanto is scheduled for completion by 2030. Energy and industrial construction...