economical, energy, power, electricity, electric power, consumption of energy,

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Keywords: building, buildings, change, climate, consumption, dmmung, ecological, ecology, economical, efficiency, effizienzsteigerung, electric, electricity, endenergiebedarf, energy, engineering, future, heat, kologie, power, repress, save, saving, thrifty, warmth, wattage, wrmedmmung, zukunftsenergie