Is perfume or incense considered a fast-breaker for the one who is fasting, and what is the ruling for one who cooks his food over wood that produces smoke?

Question:
He says: Honorable Shaykh, may Allah grant you success, is perfume or incense considered a fast-breaker for the one who is fasting? And what about the one who cooks his food over wood that has smoke; does that break his fast? If he did not intend to smell the smoke, but the smoke went into his mouth or his throat without his intention.

Answer:
So what is harmful, and it is not permissible to smell incense, because this is intentional. If he intends to smell the incense, this invalidates his fasting. But if the incense reaches him without intention and reaches his nose without intention, this is not harmful. The criterion is intention and the absence of intention. And Allah the Exalted knows best, and may Allah send prayers and peace upon our Prophet Muhammad and upon his family and his Companions.