Preparing the Fire Before Shabbos: Shema Yechateh, Modern Heating, and the Erev Shabbos Announcement

Topics

• The Fire Must Be Established Before Shabbos
• What Was Different About the Old Winter Oven?
• Different Forms of Shema Yechateh
• Warming Oneself Near a Fire
• Is the Concern Only When the Fire May Die Out?
• A Heker Is Not a New Gezeirah
• Returning to the Structure of the Sugya
• What About an Adjustable Radiator?
• The Erev Shabbos Shofar
• Early Kabbalas Shabbos and the Short Winter Friday
• The Rav Has to See the Working Jew

Transcript

## The Fire Must Be Established Before Shabbos

I want to begin with the basic halachah in **Shulchan Aruch, Orach Chaim 255:1**. A person may not make a *medurah* close to nightfall on Erev Shabbos unless the fire has already taken hold to the point that **“tehei hashaleheves olah me’eileha”**—the flame can continue rising on its own, without needing additional help. If the fire was not established to that degree before Shabbos, Chazal were concerned that a person might come to stir or rearrange the wood on Shabbos in order to strengthen the flame.

At first glance, this sounds like an old-fashioned halachah. We do not generally heat our homes with open wood fires, and many of the cases in these simanim involve ovens and fuels that are no longer common. But the *yesod* is very much *noge’a*.

The **Mishnah Berurah, O.C. 255:1**, applies the same rule to a *tanur shel beis hachoref*, the old winter oven used to heat a house. If the oven was sealed with clay there was no ordinary concern of *shema yechateh*. If it was not sealed, the Mishnah Berurah writes that where there is enough time before Shabbos for the fire to become self-sustaining, the basic requirement of *shaleheves olah me’eileha* is met. Nevertheless, he adds that *lechatchilah* it is proper to finish the heating process while it is still weekday, because otherwise burning pieces of fuel may remain and one may later have to involve a non-Jew in putting them out so that the oven can be closed without losing its heat.

That immediately raises the modern question.

What is the halachah of a boiler, furnace, or home heating system? Suppose I turn it on immediately before Shabbos. Must the system already be fully operating before Shabbos in the same way that the old fire had to be established? Or is a modern heating system fundamentally different?

Our systems are certainly not *to’ach b’tit*. They are not sealed in a way that removes all human control. A thermostat or control can raise or lower the heat. So the issue cannot simply be dismissed.

The question is deeper: **what exactly is the concern of *shema yechateh* in this halachah, and what part of the old case carries over to the modern one?**

That is the sugya I want to clarify.

## What Was Different About the Old Winter Oven?

To understand the Mishnah Berurah, we first have to understand the old oven.

The heating system he is discussing worked with burning fuel inside the oven. After the fuel had done its job, the remaining coals could not simply remain there indefinitely. In practice, the coals had to be dealt with so that the oven could be closed and retain its heat. If the opening remained exposed, the oven would cool; if the burning material remained in a dangerous state, the system could not simply be treated as finished.

That is why the Mishnah Berurah says that even where the technical requirement of *shaleheves olah me’eileha* has been reached, one should preferably complete the heating process before Shabbos. He is not merely discussing whether a flame exists. He is discussing a system that still invites direct involvement with the burning fuel.

Now let us return to our heating systems.

At first sight, one could say: a boiler is also a fire. If Chazal required the old fire to be established before Shabbos, why should I be allowed to turn on my boiler one moment before Shabbos and let the system begin working afterward?

Here I cited a distinction in the name of **Rav Shlomo Zalman Auerbach** that requires careful understanding.

In the old case, the *cheftza* that concerns us is the burning fuel itself. We need the wood or coals to be burning properly. The halachic benchmark is therefore whether the flame has taken hold and can continue on its own.

In a modern heating system, however, I do not care about the fuel as an independent object. I am not interested in producing beautifully burning oil, gas, or some other fuel. I want one result: **heat in the room**.

That sounds like a small distinction, but it may change the entire structure of the *shema yechateh* concern. The old case asks whether the fire itself is sufficiently established. The modern case may be one in which the combustion is simply the mechanism that produces a result I want elsewhere.

This is not yet enough to decide the question. We still have to compare it to other cases in Shulchan Aruch where I do not want the fire for itself but I do want the object being heated.

That will show us that there is more than one type of *shema yechateh*.

## Different Forms of *Shema Yechateh*

There is an important distinction running through these halachos.

When food is left on a fire for Shabbos, the concern of *shema yechateh* is not limited to a weak flame that may go out. Even a stable fire can present a concern, because I want the food to cook better or faster. That is the world of *gerufah u’ketumah* and the halachos of leaving food on a heat source.

Now look at another case. **Shulchan Aruch, O.C. 254:9** discusses placing a barrel of water into an oven close to Shabbos. The **Mishnah Berurah there, se’if katan 49–51**, explains that even though water can be drunk cold, heating it is valuable, and there can therefore be a concern that one will stoke the fire. He specifically discusses water that may be wanted hot for washing utensils.

Here the fire is not the final object I want. I want the **water** to become hot.

That gives us a useful framework.

One case is where I want food cooked for eating. Another is where I want an object—such as water—heated for some other practical use. A third case is our siman, O.C. 255, where the discussion is about the fire itself becoming properly established before Shabbos.

Now we can return to a modern heating system.

A boiler may heat water, burn oil, or ignite gas, but I do not want the water, oil, or gas as the final product. I want the **result produced by the system: a warm house**. That is the distinction I was using to explain the ruling attributed here to Rav Shlomo Zalman. The water or fuel is not my desired object; it is only part of the mechanism.

That is why the case cannot automatically be compared to the barrel of water in O.C. 254. There I want the water hot. Here I do not care about the water at all except as a means of carrying heat through the system.

The point is not that every modern heater is automatically permitted in every configuration. The point is that before applying an old *shema yechateh* case to a modern system, we must first identify **what the person wants, what object is being improved, and where the temptation to adjust the system lies**.

Without that analysis, the cases look identical because they all involve fire or heat. With the analysis, we see that they may belong to different categories.

## Warming Oneself Near a Fire

There is another source that complicates the picture.

The **Taz, O.C. 275:6**, writes that although it is generally permitted to warm oneself near a fire on Shabbos, one should not sit immediately next to the ends of the burning logs, because there is a concern that one may touch or rearrange them so that they burn better. The **Mishnah Berurah, O.C. 255:7**, brings this opinion, while also recording that the Eliyah Rabbah and Tosefes Shabbos disagree and do not accept that concern in the same way.

This is important because now we are no longer talking about cooking food.

Suppose I walk into a cold room on Shabbos and my hands are freezing. I stand near a fire because I want warmth. If the fire is weak, the natural reaction may be to improve it.

According to the stringent reading of the Taz, that practical human tendency itself can create a concern. The question then becomes very relevant to a fireplace. If people normally move the logs, adjust the opening, or otherwise manipulate the fire in order to get more heat, perhaps sitting right there creates the same kind of danger the Taz is describing.

I raised the possibility that if one wished to be stringent in such a situation, some recognizable *heker* or physical barrier might help remind a person not to adjust the fire. But I do not want to turn that suggestion into a formal *psak* merely because it sounds practical. The source itself has to be defined carefully, and the disagreement recorded by the Mishnah Berurah remains important.

The same question becomes even sharper with a stable gas flame.

A wood fire naturally changes. Logs shift, flames weaken, and people tend to move things around. A gas flame may remain perfectly stable until a person turns a control.

Is that the same concern?

If the whole *chashash* of the Taz is that a dying fire invites a person to rescue it, a stable gas flame may be different. But if the concern is broader—that when a person wants more warmth he may improve the heat source—then perhaps the logic extends further.

I do not want to decide that question from intuition. We have to read the Taz precisely and determine what generated his concern.

## Is the Concern Only When the Fire May Die Out?

At this point I want to look more carefully at the wording of the Taz.

The Taz describes the concern that a person sitting near the ends of the logs may touch them so that they burn properly, **“k’derech she’osin b’medurah”**—the way people ordinarily deal with a bonfire. His language also speaks about manipulating the logs so that the fire should not go out.

That creates a possible limitation.

I cited in the name of **Rav Shlomo Zalman Auerbach** that perhaps this concern is specifically where the fire itself is unstable—where, if I do nothing, the burning pieces may weaken or go out. In such a case, a person has a natural impulse to intervene and restore the fire.

If that is the definition, a steady gas flame is very different. It is not slowly dying. It does not need me to push a log back into place. It remains at the level at which the control was set.

But I was not fully satisfied with that distinction.

Why should the only concern be that the fire will go out? A person may also want the fire **hotter**. If my hands are cold and the flame is small, the human temptation is not necessarily to save a dying fire; it may simply be to increase the heat.

That is why I kept returning to the source. Is the Taz describing one very specific behavior associated with burning logs, or is he teaching a broader *shema yechateh* concern whenever a person sits close to a heat source he might naturally improve?

There is a related halachah in **O.C. 275** concerning reading by the light of a lamp or fire because one may come to adjust the flame. That sugya shows that the concern is not always limited to a fire that is literally about to go out. Sometimes the issue is that a person is engaged in an activity that makes him want better light and may therefore forget himself and adjust the source.

Still, we cannot simply merge every case.

A bonfire, a reading lamp, a gas range, and a radiator do not function in the same way. The fact that they can all be made “better” does not automatically mean Chazal placed the same gezeirah on all of them.

So I am leaving this as a real point of analysis: **does the Taz depend on the instability of the fire, or on the ordinary human tendency to improve a heat source while using it?** The practical applications depend on that definition.

## A *Heker* Is Not a New Gezeirah

This leads to an important methodological point.

Once we become sensitive to *shema yechateh*, it is very easy to overextend it.

If I say that a person warming himself might adjust a fire, then perhaps every adjustable appliance in the house becomes a problem. A heater can be turned higher. A lamp can be made brighter. Any device might tempt a person to do something prohibited.

But that cannot be the way we learn.

A gezeirah has a defined structure. We first have to know what Chazal prohibited and how the poskim extended that concern. We cannot create a new gezeirah every time we can imagine that somebody might forget himself.

That is why I was debating the role of a *heker*.

If a posek says that in a particular case there is a real concern but some visible change can remind the person not to adjust the device, that is one thing. But I do not want to say that every fireplace, every heater, and every adjustable system now requires a homemade “blech” merely because one can invent a scenario.

The Taz gives us a defined case: sitting close to the burning ends of a *medurah*. The Mishnah Berurah records the Taz but also records dissent. Rav Shlomo Zalman, as I quoted him here, appears to narrow the concern by focusing on a fire that is liable to weaken or extinguish. That exact source has to be checked.

So the responsible way to proceed is not to multiply chumros. It is to identify the category.

If the situation is genuinely parallel to the old *medurah*, then the Taz becomes highly relevant.

If it is a stable modern heat source with no ordinary practice of manipulating the burning material, the analogy may be weaker.

And if a person knows that he personally is likely to adjust something out of habit, then even apart from the formal scope of the gezeirah, a practical reminder may be wise. But practical advice and a formal issur are not the same thing.

I want that distinction to remain clear.

## Returning to the Structure of the Sugya

Let me put the sugya back together.

We have several different categories that can all sound like *shema yechateh*, but they are not identical.

First, there is food left on a fire. There the concern exists because I want the food to cook properly, and the classic halachos of *gerufah u’ketumah* govern the situation.

Second, there is an object such as water that I want heated for a practical use. **O.C. 254:9** and the Mishnah Berurah there show that this too can create a concern of stoking the fire.

Third, there is **O.C. 255**, where the fire itself has to be established before Shabbos to the point of *shaleheves olah me’eileha*. The issue is whether the burning process still needs human help.

Fourth, there is the Taz’s concern about a person sitting immediately near a *medurah* and instinctively moving the burning ends so that they burn better.

Those four cases are related, but I do not want to blur them into one rule.

That is the point I was pressing in the discussion. If the Taz is simply an application of the general prohibition of adjusting a fire, we need to know how far that principle extends. If, however, he is addressing a special behavior unique to a bonfire—people naturally push the logs back into the center—then we cannot jump from a bonfire to every appliance in the house.

A *sevara* can be strong and still require boundaries.

I may personally feel that when somebody is cold and standing next to a weak heat source, there is a very real temptation to increase the heat. But halachah is not built merely from “this feels similar.” We have to know whether the source actually created that category.

So I am not trying to weaken the Taz, and I am not trying to expand him. I am trying to read him *kipshuto*.

Only after the category is clear can we ask the modern question correctly.

## What About an Adjustable Radiator?

Now take a very ordinary modern case.

A person has a plug-in radiator or another adjustable heater. It is running on a low setting. He is cold, so he moves close to it to warm himself.

What is his normal weekday reaction if it is not warm enough?

He turns it higher.

That is why the question is not theoretical. In real life, people do adjust heat sources when they are cold.

But again, I do not want to skip the earlier step. Does the Taz’s concern about a *medurah* extend to this? The Taz did not discuss electricity. He did not discuss a thermostat. He discussed burning logs.

One way to learn the Taz is very narrow: the concern belongs to a *medurah* because the burning ends are physically in front of you and people commonly push them into the fire.

Another way to understand the underlying concern is broader: whenever a person is using a heat source and the ordinary way to improve the result is to manipulate that source, there may be room to worry that he will do so on Shabbos.

I was pushing on that distinction because it determines the modern application.

We cannot say, “Anything adjustable is forbidden to sit near.” That would be a new gezeirah of our own making.

But we also cannot say, “It is electricity, so it has nothing to do with the old sugya.” The human behavior may be exactly what the old poskim were concerned about: I want more heat, and the control is right there.

So the proper *lomdus* is to identify what in the original case was essential.

Was it the burning log?

Was it the possibility that the fire would go out?

Was it the proximity of the person to the mechanism he normally adjusts?

Or was it the specific gezeirah of reading or using a *medurah*?

Until that is clear, I would not turn the discussion into a broad practical ruling. But the question itself is exactly the kind of question these old simanim force us to ask about modern life.

## The Erev Shabbos Shofar

From here I want to move into **Shulchan Aruch, Orach Chaim 256:1**.

When Klal Yisrael lived in its settled communal framework, Chazal describe **six tekios on Erev Shabbos**. The purpose was practical: to separate the people from their weekday work and prepare them for Shabbos.

The Rema writes that in later communities, instead of those tekios, the *shaliach tzibbur* would make an announcement as Shabbos approached so that people would prepare themselves.

That raises an interesting question.

Is the later *hachrazah* merely a different local custom, unrelated to the original tekios? Or is it serving the same basic function that the tekios once served—a public declaration that the weekday is ending and the community must disengage from melachah?

The way the halachah is presented strongly suggests that the communal reminder itself matters.

Today we have calendars, clocks, phones, emails, sirens, and all kinds of reminders. Everybody can know the exact time of sunset. But knowing the time is not necessarily the same thing as having the community announce: **Shabbos is coming. Stop. Prepare yourself.**

The Mishnah Berurah in this siman discusses the communal responsibility to make sure that people leave their work and that stores close in time. The point is not merely information. It is to create a real boundary between the weekday and Shabbos.

That is why I was asking whether a modern siren or some other communal signal could fulfill the spirit of this *hachrazah*. I am not saying that every modern noise automatically has the formal status of the old tekios. I am asking what the halachah was trying to accomplish.

Once we understand that, we can appreciate the next question as well: **when should the community begin Shabbos, especially on a short winter Friday when people are likely to work until the last possible moment?**

## Early Kabbalas Shabbos and the Short Winter Friday

There is a common assumption that “early Shabbos” belongs to the summer. The days are long, so people daven early in order to make the seudah at a reasonable hour.

But I grew up with a different picture.

In the old European communities I knew about—Radin, Pinsk, and similar places—the pressure of an early Shabbos was especially real in the winter. Friday was short. People were working. If everybody waited until the last possible moment, they could easily run straight into Shabbos.

That is why the discussion in **Shaar HaTziyun to O.C. 256** is so important. The Pri Megadim, as cited there, discusses having the community accept Shabbos early so that people do not continue their weekday work until the edge of the zman.

That changes how we think about an early Kabbalas Shabbos.

It is not merely a convenience for the summer. It can be a safeguard for Shabbos itself.

If the communal tefillah begins early, a person who would otherwise still be in his store or office has a reason to stop. The shul creates a boundary. Instead of waiting until the clock tells him that Shabbos has already arrived, he is drawn out of the weekday beforehand.

In the shiur I also raised the related question of communities that davened Maariv early and how they dealt with the proper time of Krias Shema. That is a separate halachic discussion. It should not simply be folded into the Pri Megadim citation without checking the exact sources and conditions.

The broader point, however, is clear.

On a short Friday, the danger is not that people have too much time. The danger is that they have too little time and try to squeeze one more task into the day.

Sometimes the strongest way to protect Shabbos is to begin Shabbos earlier.

## The Rav Has to See the Working Jew

The discussion of *hachrazah* and closing the stores brought me to another point.

A rav has to protect Shabbos. But he also has to see the Jew who is struggling to earn a living.

It is very easy to stand in the beis medrash and say, “Everybody should stop working much earlier.” But what about the man whose *parnassah* is difficult? What about the immigrant who has just arrived, who is working every hour he can, and who is trying to keep Shabbos without losing his livelihood?

The Mishnah Berurah’s discussion in this siman shows that communal leadership has to deal with the reality of people’s work. There must be a system that gets people out of the stores and into Shabbos before it is too late. But that does not mean ignoring the pressure under which working families live.

This helped me understand something my father did.

He made the Friday-night minyan earlier. He did not demand that working men create an unrealistic gap between their jobs and davening. He told them, in effect: **come straight from work. Come to shul. Enter Shabbos.**

I remember that world. Men came from work with very little time. The job of the rav was not to make Shabbos harder for them. The job was to make it possible for them to keep Shabbos properly.

That is the balance I see in these halachos.

On the one hand, Shabbos cannot begin by accident. A community needs an announcement, a boundary, a schedule, and leadership that says clearly when the weekday must stop.

On the other hand, leadership has to understand the Jew standing in front of it.

The goal is not merely to tell people that they are late.

The goal is to bring them into Shabbos.