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Daniel Libeskind's Imperial War Museum North revealed as energy-guzzler

Some of the country’s best-known contemporary buildings guzzle as much energy as their older cousins, an investigation by the Guardian has uncovered.

On the day after the new Display Energy Certificates (DEC) came into force for all public buildings over 1,000m2, it has been revealed that Daniel Libeskind's 2002 Imperial War Museum North (pictured) in Manchester has the same ‘bottom-of-the-class’ energy-use rating as the Houses of Parliament.

Both icons scored the lowest G efficiency rating, on a new scale where an A grade is given to buildings which produce the least carbon-dioxide emissions.

Other surprises included Foster + Partners’ helmet-shaped City Hall in London, which only mustered an E rating.

The new certificates have to be displayed on public view in every ‘qualifying’ public building, but, according to the report, at least a quarter of the 3,200 buildings assessed to date scored only an F or G rating.

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