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Required information

A $1\mathrm{.}0m1\mathrm{.}5m$ double$-$pane window consists of two $40-$mm$-$thick layers of glass $(k=0\mathrm{.}78\frac{W}{m}*K)$ that are separated by a $28-$mm air gap $(k_{\text{a}\text{i}\text{r}}=0\mathrm{.}025\frac{W}{m}*K).$ The heat flow through the air gap is assumed to be by conduction. The inside and outside air temperatures are $20C$ and $-20C,$ respectively, and the inside and outside heat transfer coefficients are $40\frac{W}{m^2}*K$ and $20\frac{W}{m^2}*K.$

Determine the daily rate of heat loss through the window in steady operation. $($You must provide an answer before moving on to the next part.$)$

The daily rate of heat loss through the window in steady operation is

W$.$