Meridian Energy's Wellington head office continues to win awards for its green credentials nearly seven years after it was completed.
The EECA 2014 energy management award goes to building owner DNZ Property Fundfor its fine-tuning of energy-saving features.
The $29 million structure, hailed at its 2007 opening by Prime Minister Helen Clark as the first building in the country to receive a five-star rating from the Green Building Council, has several "climate-responsive" systems.
They include automatic louvres, solar control blinds, opening windows and daylight sensors.
Its lighting has been upgraded to LEDs, helping the building to a score of 5.5 out of six using the Nabersnz energy performance rating system.