AI and other GPU workloads need dense, liquid-cooled capacity, but new data centres take years to plan, power and build, and much of the heat they produce goes to waste. At the same time, buildings spend heavily on heat, and many have unused space in their technical rooms and grid connections with capacity to spare.
Northeast Flow (NEF) connects the two. We develop and operate high-density compute sites inside existing buildings. Hosting customers bring their own hardware and get liquid cooling for racks of up to 150 kW, in sites specced with them and running in months rather than years. The servers' heat goes into the building's heating, so the property owner gets cheaper heat from space that used to earn nothing.
Because the building, grid connection and technical room already exist, less new infrastructure gets built, and the same energy does two jobs. Our vision is compute that helps heat the city it runs in.
NEF was founded in Helsinki in 2018 and has run heat-led compute in buildings' technical spaces since 2021. Our operational sites have capacity for around 5 GWh of heat a year, delivered to buildings across Southern Finland. We're a small team backed by experienced advisors and board members, starting GPU hosting in Southern Finland with a model that works wherever buildings need heat and compute needs a home.