Система сохранения энергии, специально разработанная для этого здания, позволяет потреблять в половину меньше электроэнергии, чем могло было быть использовано любым зданием такого размера.
Energy conservation system, specially developed for this building allows you to consume less electricity than half could be used by any building of that size.
energy conservation system, specially designed for the building, allows to consume half as much electricity than it would be applied to any building of this size.
the system energy conservation, specially developed for this building allows you to consume less than half the electricity could be used in any building of this size.