Why are the heater cores located under the window?

You may have thought of this before; In most buildings such as government offices, schools, or in the rooms of our homes, honeycombs are mainly placed under the windows. When you think about it, it feels like there is something wrong with this choice, right?

The reason for this is that this area is idle and it will be placed in the room. bed, closet, armchair etc. You can think of it as leaving room for items such as in other parts of the room. Yes, it seems like a partially logical thought. but that’s not why.

In this article, we will tell you why such an application exists. We will explain one by one.

Although the windows are well insulated, we know that there is a cold air flow from there and this is the coldest part of the room.

Most people are also aware of the fact that the air heated by the honeycombs directly encounters this cold air. that the heat is trapped in this area and therefore the heating of other parts of the room. later thinks it’s happening. When approaching this situation with such an idea, the honeycombs placed in front of the window may seem meaningless. But of course, the process does not go as expected here.

A simple knowledge we learned in middle school actually explains this situation easily.

Warm air rises, cool air descends. Because the air molecules in the heated air dilute, expand and become lighter. Since its density will decrease, the pressure it will exert on the unit surface on the ground will decrease. For cold air, the situation is the opposite. The best example of this is hot air balloons.

For this reason, honeycombs placed in front of the windows mean rapid heating of the room. most logical place appears as. So why?

While the hot air coming out of the honeycomb rises towards the ceiling, it is directly opposed to the cold air coming from the window. it isolates the room by creating a barrier. Thanks to this barrier, while the cold air descends directly towards the core, on the other hand, the rising hot air enters the room. to push faster It helps.

As an example, the following image will be explanatory:

While the hot air rising to the ceiling is moving towards the opposite wall, it is being pushed back towards the honeycomb due to the air circulation as it cools down. Thanks to this constant impulse and experienced circulation, every part of the room heats up faster.

So the trick here is; with the front of the window that contains the hot air, the coldest air in the room. direct encounter and rapid push.

temperature window room

If the honeycomb were placed on a wall opposite the window, it would be near the center of the room. heat barrier would occur. The window part of the room would remain cold compared to the other parts, as the thrust was low and the warm air had difficulty getting out of this area. That’s why honeycombs should be placed in front of the window that has the coldest air in the room. quite important.

Source: Stack Exchange, Little-Knights, Siemens


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