Jetliners parked at Sea-Tac Airport gates will be getting air conditioning or heated air from the terminal -- allowing them to turn off auxiliary power units, saving fuel and reducing pollution.
The airport said Tuesday a centralized heating and air condition plant at the airport would deliver ventilation through 15 miles of pipes to all 73 boarding gates.
A grant from the Federal Aviation Administration covers $22 million of the $43 million project.
The "pre-conditioning" began on the A and B concourses along with the south satellite. The remaining concourses and north satellite will be added by the end of the year.