Symbol for the Efficiency House standards for new buildings in Germany. A Efficiency House KFW 40 is a house that requires a maximum of 40 percent of

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Symbol for the Efficiency House standards for new buildings in Germany. A Efficiency House KFW 40 is a house that requires a maximum of 40 percent of the annual primary energy.

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Size: 5136px × 2815px
Photo credit: © Frank Harms / Alamy / Afripics
License: Royalty Free
Model Released: No

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