You\'re considering installing a 5 ft by 8 ft picture window in a south-facing w

Question

You're considering installing a 5 ft by 8 ft picture window in a south-facing wall where the average sunlight intensity is 180 {W/m^2}. The wall has R -19 insulation. The window has R = 2.1 {ft^2 degrees F *h/Btu} .
If you install the windows, how much more oil, at 100,000 Btu per gallon, will you have to burn in a winter month when the outdoor temperature averages 15 { degrees F} and the indoor temperature is 68 {degrees F}?
Installing window results in how much consuming or conserving of oil for one month?

Explanation / Answer

   The heat loss per hour is given by 1031 Btu/hr    If it will convert into Btu/month we get, 1031 Btu/hr = 742736.8 Btu/month    So the excess oil that how much we will burn is winter month when the outdoor temparature    averages 15 F and indoor temperature is 68 F is 742736.8 / 100000 = 7.43 gallon    I HOPE THAT THIS IS WRITE, THANQ

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