What do you think: Are the pipes spaced close enough here?
Stone wall 55cm (21.7 inches) + 5cm (2 inches) Haga insulating plaster
Old windows
Room height 2.85m (9.35 feet)
Floor insulated with 12cm (4.7 inches) EPS + 3cm (1.2 inches) impact sound insulation
Underfloor heating embedded in 5.5–6cm (2.2–2.4 inches) anhydrite screed, with approximately another 3cm (1.2 inches) on top for cement tiles, parquet, or resin floors
Supply temperature max. 28°C (82°F)
6 zones
Guide line spacing on insulation: 5cm (2 inches)
Thanks for your opinion!
Stone wall 55cm (21.7 inches) + 5cm (2 inches) Haga insulating plaster
Old windows
Room height 2.85m (9.35 feet)
Floor insulated with 12cm (4.7 inches) EPS + 3cm (1.2 inches) impact sound insulation
Underfloor heating embedded in 5.5–6cm (2.2–2.4 inches) anhydrite screed, with approximately another 3cm (1.2 inches) on top for cement tiles, parquet, or resin floors
Supply temperature max. 28°C (82°F)
6 zones
Guide line spacing on insulation: 5cm (2 inches)
Thanks for your opinion!
Calculate it carefully; it’s almost impossible to answer definitively... the tendency is rather no... so 28°C (82°F) supply temperature (which is already very low). It’s not a disaster. This is the supply temperature at design conditions (so it only becomes relevant about every 10 years).
What type of heating system do you have (gas, air-to-water heat pump, etc.)? Has anyone verified the heating capacity for you – since you have made significant insulation improvements?
Do you know the U-value for your wall or the square meter area of the exterior wall and window surfaces? Then I can estimate/approximate it for you based on the U-value. The pipe spacing is around 15 to 20 cm (6 to 8 inches), correct?
What type of heating system do you have (gas, air-to-water heat pump, etc.)? Has anyone verified the heating capacity for you – since you have made significant insulation improvements?
Do you know the U-value for your wall or the square meter area of the exterior wall and window surfaces? Then I can estimate/approximate it for you based on the U-value. The pipe spacing is around 15 to 20 cm (6 to 8 inches), correct?
Just from the words "old windows" and "28°C (82°F) supply temperature," I would doubt that this has been calculated in any way. When I think about our old apartment with natural stone walls of similar thickness, I still doubt that 5 cm (2 inches) of insulating plaster will bring it up to new build standards.
EveundGerd10 Nov 2015 20:38How old are the windows?
28°C (82°F) supply temperature – that will be tight even in a house insulated to the KfW 70 standard with a 15cm (6 inch) pipe spacing!
With your wall, which practically provides no insulation, and old windows on top of that, I doubt you can achieve the required heating output using only underfloor heating without exceeding the surface temperature limits.
For comparison: A rubble stone wall has a U-value of about 1.5. A modern house achieves below 0.2, and good houses are below 0.15.
That means 1/10 of the energy loss.
28°C (82°F) supply temperature – you’re not planning to heat the place with a heat pump, are you?
With your wall, which practically provides no insulation, and old windows on top of that, I doubt you can achieve the required heating output using only underfloor heating without exceeding the surface temperature limits.
For comparison: A rubble stone wall has a U-value of about 1.5. A modern house achieves below 0.2, and good houses are below 0.15.
That means 1/10 of the energy loss.
28°C (82°F) supply temperature – you’re not planning to heat the place with a heat pump, are you?
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