Direction: An unplastered brickwork has a resistivity of 0.83 m degC/W. For a 230 mm thick brick wall, the inside and outside surface resistances are 0.123 and 0.1 m² degC/W respectively.
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An unplastered brickwork has a resistivity of 0.83 m degC/W. For a 230 mm thick brick wall, the inside and outside surface resistances are 0.123 and 0.1 m² degC/W respectively. The R-value of the given wall section (in m²degC/W) is _____
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- 0.41
- 1.41
- 2.41
- 3.41
Correct Option: A
R value = (0.83 m degC/W × 0.23 m) + (0.123) + (0.1)
= 0.41 m² degC/W
