In 2015, Siemens Blade Factory selected Hoval to be the supplier of ventilation and heating products. Due to the large area of the factory, a number of decentralized ventilation units were required, and due to the large openings of the building, the mechanical introduction of fresh air was not necessary.
Construction of the 67-acre facility began in June 2020. The first trains to be assembled there will be the new Piccadilly line trains for Transport for London. The facility, which sits between the M62 motorway and the River Ouse, is dominated by three large separate buildings for the assembly, single car testing and commissioning of the trains, with each building requiring a heating and ventilation solution.