Hello,
the sun only shines into these windows for a brief period during the morning and evening. Given the angle of the sun and some other factors, the heat gain is very minimal. If you wanted to be conservative, you could take 25% of the south windows heat gain for two hours (one hour for east window and one hour for west window). Being realistic, there is quite a bit of buffer built into most of these calcuations so this is not a problem.
East and West
Hello,
the sun only shines into these windows for a brief period during the morning and evening. Given the angle of the sun and some other factors, the heat gain is very minimal. If you wanted to be conservative, you could take 25% of the south windows heat gain for two hours (one hour for east window and one hour for west window). Being realistic, there is quite a bit of buffer built into most of these calcuations so this is not a problem.