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Tzomet Institute approves hot water on Shabbat in 2 resorts

July 18, 2019 - from Arutz 7 :

"For first time, Tzomet Institute grants technological approval to Shabbat hot water system for two guest houses in Israel."

"At the Ramot Shapira Guest House and in the Keshet Guest House in the Golan Heights, hot water can now be used on Shabbat according to Jewish law."

"Tzomet Institute engineers examined the heating system and found that the electric boilers are shut down during Shabbat and holidays by an astronomical timer programmed for decades ahead. The system works with heat exchangers that separate the heated water from the incoming water."

"The incoming water is heated only by the walls and pipes of the boiler, and not directly from the fire. Therefore the water entering the system has only the status of a "second vessel" that many halakhic authorities allow to be reheated on Shabbat."

"Tzomet Institute head Rabbi Menachem Perl says at hotels many people accidentally open the hot water tap on Shabbat, possibly igniting a new spark and thereby desecrating the Sabbath."