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Building Elements - Heat Loss vs. Thermal Resistivity

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Thermal resistance in some common building elements are indicated in the table below. The values can be used to approximately heat loss calculations from buildings.

Thermal Resistance - Inside and Outside Walls
Thermal Resistance Inside and Outside WallsResistance (m2K/W)
Ri = 1/fi 1) Ro = 1/fo 1) Ri+ Ro
Building parts against the surrounding environment 0.13 0.04 0.17
Building parts others 0.13 0.13 0.26

Building Elements - Thermal Resistance against Earth
Thermal Resistance for Building Elements against EarthResistance (m2K/W)
Floors 0.5 m above to 0.5 below earth bound, 0-1 m from inside outside wall - without cold bridge protection 0.2
Floors 0.5 m above to 0.5 below earth bound - with cold bridge protection 1.0
Center-field above 1 m from inside outside wall 1.5
Basement floors 0.5 m below earth bound 2.0
Basement walls under earth bound, the whole wall against the earth, where h is the basement floors level below the earth bound (m) 0.2 + 0.3 h
Basement walls under earth bound, basement floor against the earth and partly against air 2.0
  • 1 K/W = 0.5275 (h oF)/Btu
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