If the warm lower pot is still sitting on an open fire, does placing a cold vessel on top of it on Erev Shabbat remain permitted?
Synopsis
When the lower pot remains on an open fire, the Magen Avraham and Biur Halacha rule the situation changes — the pot now has the status of a heat-adding source and the rules of shehiyah apply rather than simple hatmanah.
More in Insulating with Heat-Generating Materials
Is it permitted on Erev Shabbat (while still daytime) to place a vessel containing cold food on top of a warm pot?
5 opinions across 3 eras
Is it permitted on Shabbat itself to place a cold vessel on top of a warm pot (not on fire) to warm it, particularly when the pot is covered with cloth?
3 opinions
Is it permitted to submerge a vessel with cold liquid inside a vessel of hot water on Shabbat to warm it (a practice common in winter)?
2 opinions
Is it permitted to cover a vessel of hot tea or similar drink with a cloth (mafteches/towel) on Shabbat to keep it warm?
2 opinions
What is the reason the warm pot is not considered a 'heat-adding insulator' (davar hamosif hevel), and does this reasoning have any limits?
3 opinions
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