Reply To: using hot water from tank on shabbos

DaasYochid; I am embarassed to say but I do not know how “to post a link”. Also, the actual teshuvo starts earlier than your posted link. (starts on page 301- shin-alef)

I am aware that the vast majority of Poskim do not allow it ,as I said in my initial posting, but R’Dovid zz’l has a novel way of looking at it-‘midin gromo’-that brings with it many other facets and may have applications in different situations.

oomis- I do not know to answer your question but I would not be surprised if such mechanism exists, in today’s technologically rich world. And, most interestingly, if such mechanism exists, the issues raised by the teshuvo I mentioned become even more relevant.