排煙 はいえん Meanings Noun smokestack smoke; flue gas; factory smog; exhaust gas Noun, する verb, Transitive, Intransitive smoke extraction; smoke ejection; smoke dispersal Kanji 排 expel. Read as ハイ. 煙 smoke. Read as エン. Words containing 排煙 排煙口 (はいえんこう) smoke outlet Jinuma: Japanese Dictionary · Word lists