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49 votes

Why are so many radiators installed beneath a window (at least in Germany)?

In addition to the three good reasons from Ratchet Freak and Isherwood, I add that placing the radiator near the window is most efficient. It heats the coldest air in the room and allows the air ...
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38 votes

Why are so many radiators installed beneath a window (at least in Germany)?

Because other wall space tends to get filled with closets, art and random stuff. Below a window tends to remain free real estate. Windows tend to stay closed during heating season so a window left isn'...
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19 votes

Why are so many radiators installed beneath a window (at least in Germany)?

In addition to what's been said, in extreme climates like Germany* and Minnesota, the window would completely frost over in January. Even modern low-e windows can't overcome -40°F, especially when ...
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15 votes

Why are so many radiators installed beneath a window (at least in Germany)?

Windows are almost always going to be less efficient than wall assemblies (even triple pane windows will be less efficient than wall assemblies built with energy efficiency in mind — triple glazed has ...
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12 votes

Why are so many radiators installed beneath a window (at least in Germany)?

There are a couple of (german-language) websites easily found that explain why this is the best and most efficient place to put your radiator, e.g. https://heizoel.totalenergies.de/rund-um-heizoel/...
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  • 406
9 votes

Why are so many radiators installed beneath a window (at least in Germany)?

This pattern is decades (or maybe a honest century) old and not limited to Germany. When the central heating started to emerge, energy prices were much, much less of a concern and the modern energy-...
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8 votes
Accepted

Why does my heat pump "blow" at warm (even hot) outdoor temperatures? Should not it be inactive?

The heat pump is also responsible for heating hot water (also a feature), is that the reason for the blowing? Yes, hot water in a the tank (which is well above ambient temperatures) will slowly cool ...
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5 votes

Why are so many radiators installed beneath a window (at least in Germany)?

If you open the Window, well.. all the heat immediately flows away by convection. You are expected to air the room once or twice a day by opening the window wide for up to 20 minutes. At which time ...
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  • 151
4 votes

Why are so many radiators installed beneath a window (at least in Germany)?

It leads to a more uniform temperature across the room, which helps saving energy. Having lived in an old, poorly insulated house with a gas oven at the central wall, I can confirm that you get an ...
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  • 41
4 votes

Why are so many radiators installed beneath a window (at least in Germany)?

I studied the flow fields induced by convective heating in this exact situation for a university project. In fact it was a situation just like Tom's picture. Indeed I think that heating the air near ...
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4 votes
Accepted

Can I split a single 2500 watt baseboard heater into 2 smaller heaters?

Your plan will work. You'll need to pigtail to the first heater and continue the 240V run to the next heater. NB cable can be run in the walls and individual wires in conduit. Check codes to see if ...
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2 votes

Can I replace one hot water radiator with electric underfloor heat?

is it mainly to feel nice on your feet or can it be used to heat the room? It is used to heat the room. How it feels depends on how well the building is insulated. If it is well insulated, then the ...
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1 vote

Solar powered heating, the 1st step on the research phase

I'd recommend an energy audit of the house first: in winter, how much energy comes in as heating, how much comes out as losses. And in summer, how much unwanted energy sneaks in, making the house too ...
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1 vote

Why are so many radiators installed beneath a window (at least in Germany)?

Being a plumber all my life who has also studied building and construction, I believe that by reading some of the answers, I find a lot of them have correct elements to them, such as aesthetics, not ...
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1 vote

Can I split a single 2500 watt baseboard heater into 2 smaller heaters?

The answer should be yes NEC 220.51 in this case there is not enough diversity in the load electric heat in this case so it is continuous and 1920w max on a 20 a 120v circuit. fixed space heating is ...
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