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Wutzebaer7 Oct 2017 00:36Hello everyone
We are building a townhouse to KfW 55 standard. So far, we have planned to use conventional radiators, as we find their response time better. However, doubts are now arising about whether these radiators can even be used in a KfW 55 building or if there are any reasons against it.
Has anyone dealt with this or is knowledgeable about it here?
We are not fans of underfloor heating, but if there is no other technical option and someone can explain why, we would consider using it as a last resort.
We are building a townhouse to KfW 55 standard. So far, we have planned to use conventional radiators, as we find their response time better. However, doubts are now arising about whether these radiators can even be used in a KfW 55 building or if there are any reasons against it.
Has anyone dealt with this or is knowledgeable about it here?
We are not fans of underfloor heating, but if there is no other technical option and someone can explain why, we would consider using it as a last resort.
Underfloor heating is standard nowadays. Falling behind on this risks the resale value, so I wouldn’t recommend it. Increased thermal inertia is not inevitably due to the system itself, but can also be a matter of design.
The question with traditional radiators is: where to place them. Creating niches under windows like in the past, where they then hang behind thin exterior walls, is not ideal. However, placing them anywhere else also takes up space.
https://www.instagram.com/11antgmxde/
https://www.linkedin.com/company/bauen-jetzt/
The question with traditional radiators is: where to place them. Creating niches under windows like in the past, where they then hang behind thin exterior walls, is not ideal. However, placing them anywhere else also takes up space.
https://www.instagram.com/11antgmxde/
https://www.linkedin.com/company/bauen-jetzt/
Why don’t you want underfloor heating? Is it just because of the response time or because of hot feet?
Neither is really an issue nowadays. In new buildings, the heating is run constantly at a very low level, so there’s no need for a quick jump from 18 to 22 degrees. This feels more comfortable overall and does NOT consume more energy than letting the rooms cool down.
Also, hot feet are no longer a problem in new houses if the heating installer does their job properly. The underfloor heating is designed so that the surface temperature does not exceed 32°C (90°F), making it unnoticeable on your feet.
Or do you have other concerns?
Cost shouldn’t really be much of a factor, if at all.
Resale value was mentioned, as well as the question of location/placement.
The appearance also suffers.
Any allergy issues? Other concerns?
Neither is really an issue nowadays. In new buildings, the heating is run constantly at a very low level, so there’s no need for a quick jump from 18 to 22 degrees. This feels more comfortable overall and does NOT consume more energy than letting the rooms cool down.
Also, hot feet are no longer a problem in new houses if the heating installer does their job properly. The underfloor heating is designed so that the surface temperature does not exceed 32°C (90°F), making it unnoticeable on your feet.
Or do you have other concerns?
Cost shouldn’t really be much of a factor, if at all.
Resale value was mentioned, as well as the question of location/placement.
The appearance also suffers.
Any allergy issues? Other concerns?
Hi,
we are also in the process of planning a house. I will probably go for underfloor heating. This way, you always have warm floors when needed (so you can walk barefoot at home), and if necessary, you can quickly heat the room with radiators.
With underfloor heating, the pipes are laid in the floor but with larger spacing, and radiators are also installed; there are two separate circuits.
I think that is brilliant. It doesn’t make much difference in price either. That could also be an option.
we are also in the process of planning a house. I will probably go for underfloor heating. This way, you always have warm floors when needed (so you can walk barefoot at home), and if necessary, you can quickly heat the room with radiators.
With underfloor heating, the pipes are laid in the floor but with larger spacing, and radiators are also installed; there are two separate circuits.
I think that is brilliant. It doesn’t make much difference in price either. That could also be an option.
I think it’s a bad approach...
Larger spacing means higher supply temperatures, which directly results in increased energy consumption.
Having two systems, such as underfloor heating and radiators, leads to more complex controls and higher temperatures for the radiators, which also means higher consumption and increased investment costs.
So what’s so brilliant about spending more money and having higher operating costs compared to a commonly used low-temperature underfloor heating system nowadays?
P.S. The sensation of “warm feet” (like with electric underfloor heating) only occurs at outdoor temperatures around 0°C (32°F); anything else indicates a poorly adjusted heating system or a house that does not comply with current energy efficiency regulations.
Larger spacing means higher supply temperatures, which directly results in increased energy consumption.
Having two systems, such as underfloor heating and radiators, leads to more complex controls and higher temperatures for the radiators, which also means higher consumption and increased investment costs.
So what’s so brilliant about spending more money and having higher operating costs compared to a commonly used low-temperature underfloor heating system nowadays?
P.S. The sensation of “warm feet” (like with electric underfloor heating) only occurs at outdoor temperatures around 0°C (32°F); anything else indicates a poorly adjusted heating system or a house that does not comply with current energy efficiency regulations.
Wutzebaer schrieb:
Hello everyone
We are building a town villa to KfW 55 standard. So far, we have planned to use regular radiators. We find these better in terms of response time...What do you mean by response time? Nowadays, frequently turning heating up and down is actually counterproductive. And what do you mean by "we are not fans"? It sounds like you haven’t yet talked to a professional, haven’t informed yourselves enough about modern house construction according to the Energy Saving Ordinance, and have little knowledge of heating technology or energy-efficient heating settings.
If it’s better for rooms, for example, to keep radiators constantly at level 3 instead of constantly switching between 1 and 5, there is no problem with response time. If this way of heating is the right one (which underfloor heating does), then you can hardly be a “fan” of something that just works efficiently.
A house built to the Energy Saving Ordinance standard hardly cools down, so the temperature is kept steady with few manual adjustments, where quick response is not needed. The goal is to heat energy-efficiently.
Could it be that your first sentence is premature and you are still in the personal planning phase without having spoken to a building surveyor or architect?
KfW 55 does not really match your current approach; KfW 70 would be sufficient. But the same heating principles apply.
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