Then inform yourself about the physics, come on. Just a bunch of smart alecks here. A climate where the dew point is above 22 degrees Celsius (72°F) is practically impossible in Germany. Weather is considered muggy when the dew point reaches 16 or 17 degrees Celsius (61 or 63°F). For the dew point to reach 22 degrees Celsius (72°F), you need almost 50% more moisture than what we understand as muggy conditions. Those are conditions typical for Florida in summer, but such considerations are completely irrelevant for Germany, let alone Berlin.
In practice, with a properly and correctly installed ceiling cooling system, you have zero problems and always maintain the perfectly desired temperature without the disadvantages of an air conditioning system. The only downside is that it costs a lot of money.
In practice, with a properly and correctly installed ceiling cooling system, you have zero problems and always maintain the perfectly desired temperature without the disadvantages of an air conditioning system. The only downside is that it costs a lot of money.
K
Knallkörper3 Jul 2017 11:49Grym schrieb:
Then educate yourself about the physics, man man man. Only smart alecks here. A climate where the dew point is above 22 degrees is practically impossible in Germany.Very entertaining. How do you actually arrive at the 22 degrees? That is not the relevant temperature for the dew point. Besides, part of my job is to inform others "about the physics." Some just don't want to learn – those are the smart alecks like you, not the other way around. I would also like to know what the quality of workmanship has to do with the actual effects of physics. One could just as well say: a well-built wooden shed won’t burn.
Just don’t do it, it’s embarrassing.
To the original poster: You asked for the ideal solution – that is clearly hydronic ceiling cooling, the counterpart to underfloor heating. You won’t have any problems with humidity in dry, non-tropical, non-subtropical Germany. But an expert will calculate that for you, so the user doesn’t need to worry.
A cheaper option is an air conditioning system. However, it’s only a second choice because it is noisy, technically inefficient (air as the heat transfer medium!), and air conditioning can become a breeding ground for bacteria.
If possible, it is important to install ceiling cooling above both floors and use solid concrete slabs.
To the original poster: You asked for the ideal solution – that is clearly hydronic ceiling cooling, the counterpart to underfloor heating. You won’t have any problems with humidity in dry, non-tropical, non-subtropical Germany. But an expert will calculate that for you, so the user doesn’t need to worry.
A cheaper option is an air conditioning system. However, it’s only a second choice because it is noisy, technically inefficient (air as the heat transfer medium!), and air conditioning can become a breeding ground for bacteria.
If possible, it is important to install ceiling cooling above both floors and use solid concrete slabs.
K
Knallkörper4 Jul 2017 09:53Grym schrieb:
Just leave it, it’s embarrassing.Strong statement considering you didn’t even provide the correct temperature for the dew point analysis. Hint: it’s not 21 to 22 degrees.
Grym schrieb:
But an expert will do the calculation for you anywayWhy calculate at all if, in your opinion, moisture problems never occur?
Maybe the expert also refers to the standard reference, Recknagel, which, when using a chilled ceiling, recommends installing an air conditioning unit to reduce humidity.
No clue yourself, but calling others smart-asses 🙄
K
Knallkörper4 Jul 2017 12:04The surface temperature of 22 degrees is actually an incorrect assumption. If the room air were also at 22 degrees, no energy transfer would take place. In reality, the ceiling surface temperature closely follows the temperature of the coolant. Physically speaking, this is because the heat transfer between the coolant and the ceiling material is much more efficient than between the ceiling material and the room air. Therefore, depending on the cooling load, the ceiling can have a surface temperature of around 15 degrees, for example, and in humid conditions, the dew point is reached very quickly.
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