SeaTac Airport Central Preconditioned Air

The Centralized Pre-Conditioned Air project at SeaTac International Airport allows aircraft to use airport supplied heating and cooling during boarding and deplaning, eliminating the need for onboard auxiliary engines. The system shifts energy use from jet fuel to low carbon electrical power, reducing emissions, noise, and airline energy costs while improving overall terminal efficiency. Work included installing chillers 30 feet below the main terminal, heaters, and approximately 15 miles of piping routed through active terminal spaces, underground areas, and exterior building systems within a 600,000+ SF facility. The airport remained fully operational throughout construction, and the project was delivered using a Design‑Bid‑Build approach.