Pornainen in three videos: a heat battery, Road 146 and the village from above
Three distinct views of Pornainen: a working sand battery, the road from Järvenpää and an older aerial introduction.
Polar Night Energy published “World's Largest Sand Battery” on 10 June 2025. The video presents the thermal storage project built in Pornainen for a district-heating network; the operator's accompanying information gives the installation's capacity and technology. It adds a contemporary industrial dimension to a municipality otherwise encountered through river valleys and dispersed villages. This is an operator's account of working infrastructure, not a visitor attraction or independent performance review. Arrange access with the operator rather than assuming the site is open to the public.
Video by Polar Night Energy · Watch on YouTube