クリーンヒーター

noun

vented heater; clean heater

A heater that vents combustion gases outside, keeping indoor air clean. Often used for gas or oil heaters with an exhaust pipe.

• クリーンヒーターは排はい気きを外そとに出だすので、部屋へやの空くう気きが汚よごれにくい。

  A clean heater vents exhaust outside, so the room air stays cleaner.