排気

1. Origins, structure, and basic meaning

• Structure: In 排気 (はいき), expel 排 and air 気 combine to denote exhaust.
• Basic usage: 排気 can mean expelling air or gas from an interior, or the gas discharged.

2. Common pitfalls and similar expressions

• Exhausting air and exhaust gas
  • 排気設備 is exhaust equipment, while 排気が can make the exhaust or its condition the subject.