Airport Buses are a common means of transferring passengers to the planes. Suvarnabhumi Airport Concourse building is equipped with many Bus Gates to facilitate this. Due to strong inward draft from the runway into the Concourse building, exhaust fume from the buses outside could enter the Bus Gates and create air pollution which irritates passengers.

Suvarnabhumi Airport implemented X-PER Heavy Duty Air Curtains at all their Bus Gates to alleviate this problem. Apart from direct benefit of increased passenger comfort (due to reduction of air pollutants), there were also other benefits such as more stable interior temperature and lower electricity usage as well.