# Outer diameter of soil layer

Outer diameter of soil layer providing a thermal resistance equivalent to $h_{soil}$.

Symbol
$D_{soil}$
Unit
m
Formulae
$D_{ext} e^{\frac{2 k_{4}}{D_{ext} h_{soil}}}$
Related
$D_{ext}$
$h_{soil}$
Used in
$e_{soil}$
$h_{amb}$