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Auckland Airport has replaced its outdated gas-fired air-conditioning system with new heat pumps to improve efficiency and reduce emissions. The new system, capable of running in mixed mode and reusing waste heat, is designed to adapt to Auckland's variable weather and passenger flows.

The airport aims to reduce Scope 1 and Scope 2 emissions by 90% by 2030, with natural gas accounting for 29% of its direct emissions. The installation is currently in a fine-tuning phase, with full commissioning expected to continue through next winter. Future airport developments include a temporary check-in pavilion and a new integrated terminal scheduled for completion in 2028-29.