Kashering at 190 degrees
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Question
Shalom, is it possible to kasher a kitchen countertop for Pesach using a steam device with 10 bar pressure and a temperature of 190 degrees?
Answer
Shalom u’vracha.
Steam is considered “irui” (pouring) and not “hag'alah” (boiling immersion).
For a countertop where the concern is that it became forbidden through irui of chametz, irui with steam is effective to kasher it.
In any case, it is proper to cover the countertop (with aluminum foil, etc.).
Irui is like hag'alah, for which 100 degrees is sufficient, and not like light libun, which requires 250 degrees.
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