A 10 m2 glass block wall with outdoor shading devices, facing North, is located at 30o South latitude and 4000 m altitude. There is no haze in the air and the dew point temperature is 10oC. a. Determine % correction to the SHG for Altitude variation.

b. Determine % correction to the SHG for Dew Point variation.

c. Determine the corrected solar heat gain through the glass block wall on 21 June at 1 pm