22 October 2015: The Guardian reports: “Hailed as the UK’s most sustainable historic building, the Regent Street office scheme, 7 Air Street, comes with an ecological roof incorporating flowers, vegetation, grasses and habitats for insects, birds and bats. The building has received BREEAM outstanding rating, the highest award possible from the industry body which judges best practice for sustainability in the built environment.
“It features solar panels, low energy air conditioning, LED lighting and a unique central energy centre, powered by fuel cell technology, which saves around 350 tonnes of carbon dioxide emissions each year, while providing power to 500,000 sq ft of commercial and residential accommodation on Regent Street, including the Cafe Royal Hotel and the 20 Air Street office building.“
A previous post provides some additional details behind the fuel cell technology used.