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The airport won the electrical and systems award for its groundwater heat pump system, which reduced heating costs and created a better environment for staff and visitors.
A wide temperature range, from -9degC in winter to 25degC in summer, presented the engineering team from MWH with a difficult challenge, the judges said.
"The project team developed a thorough understanding of local climate along with the building's energy use and were able to tailor the building heat control system to [be] warm in winter and cool in summer," category awards convener David Elms said.
The fourth New Zealand Engineering Excellence Awards are the major awards for New Zealand engineering professionals.