Hello,
we are currently considering the flooring options. In the show homes, we really liked bedrooms with high-pile carpet. The rooms have a very cozy atmosphere. Generally, we are not big fans of carpet and plan to install hardwood flooring, tiles, and laminate throughout the house. However, in the bedroom and the adjacent walk-in closet, carpet would be a real treat for the feet, instead of the rather cold laminate in oak farmhouse plank style.
We have underfloor heating everywhere, and there are now anti-allergy carpets available. But what about the risk of dust mites? I’m a bit concerned about that.
What are your opinions, and does anyone have carpet in their house or bedroom?
I’m interested to hear.
we are currently considering the flooring options. In the show homes, we really liked bedrooms with high-pile carpet. The rooms have a very cozy atmosphere. Generally, we are not big fans of carpet and plan to install hardwood flooring, tiles, and laminate throughout the house. However, in the bedroom and the adjacent walk-in closet, carpet would be a real treat for the feet, instead of the rather cold laminate in oak farmhouse plank style.
We have underfloor heating everywhere, and there are now anti-allergy carpets available. But what about the risk of dust mites? I’m a bit concerned about that.
What are your opinions, and does anyone have carpet in their house or bedroom?
I’m interested to hear.
With today’s low-temperature underfloor heating, you don’t really feel the warmth—it’s simply there. In modern houses, all the room temperatures blend seamlessly: if you have 22 degrees Celsius (72°F) in the living room, you won’t have just 18 degrees Celsius (64°F) in the next room.
We are also interested in carpet for several rooms. It is often mentioned that the thermal resistance value (R-value) of carpet should not exceed 0.15. Ours would be an expensive branded product, somewhat high-pile, suitable for underfloor heating, but with a value of 0.17.
Is it still safe to use it without concerns, or is it better to avoid it? Can the difference between 0.15 and 0.17 be expressed or calculated in any way? What values do your carpets have? And do you feel that the carpet causes higher energy consumption?
Is it still safe to use it without concerns, or is it better to avoid it? Can the difference between 0.15 and 0.17 be expressed or calculated in any way? What values do your carpets have? And do you feel that the carpet causes higher energy consumption?
The bigger, the worse. Quote:
The most important criterion is the thermal resistance. This is determined by the ratio of the thickness to the thermal conductivity of a floor covering: the higher the thermal resistance, the less effective the underfloor heating will be. For this reason, the thermal resistance of the floor covering on an underfloor heating system should not exceed 0.15 m²·K/W (0.81 ft²·°F·h/BTU).
Now the question arises why exactly 0.15 m²·K/W and how problematic is 0.17 m²·K/W? Is that still acceptable or already in the critical range? I would like to somehow estimate what kind of additional energy consumption this would cause, since a difference in the second decimal place initially seems minor.
The most important criterion is the thermal resistance. This is determined by the ratio of the thickness to the thermal conductivity of a floor covering: the higher the thermal resistance, the less effective the underfloor heating will be. For this reason, the thermal resistance of the floor covering on an underfloor heating system should not exceed 0.15 m²·K/W (0.81 ft²·°F·h/BTU).
Now the question arises why exactly 0.15 m²·K/W and how problematic is 0.17 m²·K/W? Is that still acceptable or already in the critical range? I would like to somehow estimate what kind of additional energy consumption this would cause, since a difference in the second decimal place initially seems minor.
Nafetsm schrieb:
We are also interested in carpet for several rooms. I often read that carpet should not exceed a thermal resistance value of 0.15. Ours would be an expensive branded product, somewhat high pile, suitable for underfloor heating, but with a value of 0.17.
Is it still safe to use it, or is it better not to? Can the difference between 0.15 and 0.17 be expressed or calculated somehow? What values do your carpets have? And do you feel that the carpet leads to higher energy consumption?The thermal resistance applies to all floor coverings, meaning all layers: surface material, backing, adhesive, and any insulation.
Your preferred carpet is approved for underfloor heating even though it exceeds the value of 0.15?
You mentioned it is high pile... logically that should make caution lights in thoughtful minds go from green to yellow.
What kind of backing does it have?
For carpet, the material, as well as the density and length of the surface fibers, and the properties of the backing and adhesive, all play a role.
If high pile is combined with foam backing, you may be in the red zone—but I would always aim to stay in the green zone.
Roof, you mean the Lambda value of 0.17 you mentioned... my bad.
Assuming your carpet is 1.5cm (0.6 inches) thick, the Lambda value is about 0.09 W/mK, which corresponds to an R-value of 0.17.
This means approximately 35% worse thermal resistance (assuming 12cm (4.7 inches) of insulation under the screed) compared to tile. They just need to be compensated by higher supply temperatures.
Assuming your carpet is 1.5cm (0.6 inches) thick, the Lambda value is about 0.09 W/mK, which corresponds to an R-value of 0.17.
This means approximately 35% worse thermal resistance (assuming 12cm (4.7 inches) of insulation under the screed) compared to tile. They just need to be compensated by higher supply temperatures.
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