j$.\frac{1}{2}$ in wide wall cavity between non$-$reflective surfaces $)=(0\mathrm{.}9$ based on summer temperatures

k$.3\frac{1}{2}$ in wide cavity between non$-$reflective surfaces $)=(0\mathrm{.}9$ based on winter temperatures

$3\frac{1}{2}$ in wide cavity between non$-$reflecklice surfaces $)=(0\mathrm{.}9$ based on summer temperatures