What is the calculation for the window area in a home?

The calculation for the window area in a home involves determining the total surface area of the windows present. This is best represented by taking the sum of the dimensions of each individual window and then multiplying by the number of windows. By directly measuring or calculating the area of each window (width multiplied by height), and then summing all those areas together for every window in the home, you arrive at the total window area.

Therefore, option B accurately captures the essence of this calculation by focusing on how the dimensions of multiple windows contribute collectively to the overall window area. This approach ensures all variations in window size are accounted for, leading to a precise calculation, which is essential for energy assessments and ratings in the HERS process.