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history photos r-value comparison process
light earth (’leichtlehm’) - r-value comparison
the below figures are taken from cross testing of several renowned european research institutes and are in keeping with the findings of a recent CSIRO study.





the R-value (m2K/W) describes the thermal resistance of a wall to heat flow. the reciprocal co-efficient of the amount of energy (W) travelling through 1 square metre (m2) of wall at a temperature difference of 1°C between inside and outside(1K), described by the european U-value (W/m2K).
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