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I have read several articles stating that one may double wrap food and place it into a non-kosher oven.

I haven't read anything regarding the "opposite situation". Lets say one has verified that an oven owned by a non-Jew had all non-kosher food double-wrapped. Can a Jew place kosher food that is unwrapped into that oven?

It seems to me that this would be OK, but are there any other possible concerns, here?

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The halachot of an oven are much more lenient that one of a dish, since there is no contact between the food and the oven. The real issues are regarding the oven tray which touches the food or dish and transmits taste - and possibly any recent projections of (non-kosher) food on the walls.

As such a clean oven not used for 24 hours, or having undergone pyrolysis (self-cleaning), can be used to cook kosher food if the oven tray is covered (e.g., with aluminium foil).

Your case is even simpler, it is like one of a new oven and there is no issue cooking unwrapped kosher food in there.

Source: I spent the last months learning these halachot with a rosh kollel from Bnei Brak and checked again a similar case last week.

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