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depiction:

Efu 04 b Slab foundation, insulated lower side, spacer floor

 Floor: in contact with ground – heat flow descending (BG1) – IBO benchmarks 2012
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0,138 W/m²K
A++
A+
A
B
C
D
E
F
G
OI-Class (BG1)4
G
mass 916,7 kg/m²
PENRT 2891 MJ/m²
GWP total 152 kg CO2/m²
AP 0,652 kg SO2/m²
no. type layer d
cm		 λ
W/mK		 R
m²K/W		 ΔOI3
pts/m²
1 homogene Schichthomogene Schicht Multi-layer parquet 1,20 0,160 0,08 ¹ 12
2 homogene Schichthomogene Schicht Adhesive - artificial resin 0,10 0,900 0,00 ¹ 2
3 homogene Schichthomogene Schicht Internal chipboard (650 kg/m³) 2,20 0,130 0,17 4
4 inhomogene Schichtinhomogene Schicht inhomogeneous (parts transverse) 6,00      
    62,3 cm (100%) Sheep’s wool - insulation felt (30 kg/m³) 6,00 0,040 1,50 2
    0,2 cm (0%) Distance floor attachment (60mm) 6,00 50,000 0,00 6
5 homogene Schichthomogene Schicht Normal concrete with reinforcement 2 % (2400 kg/m³) 20,00 2,500 0,08 67
6 homogene Schichthomogene Schicht Polyethylene (PE) vapour brake 0,04 ² ² ¹ 1
7 homogene Schichthomogene Schicht Schaumglasplatten (Foamglas T4+) 24,00 0,041 5,85 82
8 homogene Schichthomogene Schicht Polymer bitumen sealing sheeting 1,00 ² ² ¹ 25
9 homogene Schichthomogene Schicht Lean concrete / cast and compressed concrete 5,00 ² ² ¹ 4
10 homogene Schichthomogene Schicht Building paper 0,03 ² ² ¹ 0
11 homogene Schichthomogene Schicht Fillings made of sand, gravel, grit (1800 kg/m³) 15,00 ² ² ¹ 3
12 homogene Schichthomogene Schicht PP fleece 0,02 ² ² ¹ 0
    Rsi / Rse = 0,170 / 0,000  
    R' / R'' (max. relative error: 8,2%) = 7,843 / 6,649  
    building element 74,59   7,246 209
¹ layer is OI-relevant from BG1
² not relevant
³ U value (Heat transfer coefficient) calculated according to ÖNORM EN ISO 6946.
4 For the OI class, the U-value of the component is taken into account in addition to the ecological key figures