What is the net heat gain through the west glazing of the house?

To determine the net heat gain through the west glazing of the house, one would typically assess several factors, including the solar heat gain coefficient of the glass, the area of the glazing, and the orientation and shading of the windows.

The calculation would involve multiplying the solar radiation received by the glazing area, adjusted for any shading or reflectance, and then incorporating the specific heat gain factors relative to the west-facing orientation. In this case, the choice of 2760 btuh indicates a significant net heat gain, likely incorporating substantial solar exposure typical of west-facing windows in the afternoon sun. This result suggests that the conditions considered—like larger glazing areas or lesser shading—led to a greater infiltration of heat into the home.

The other choices represent lower calculated values, which may be derived from different assumptions or smaller glazing areas, the presence of shading devices, or less exposure to direct sunlight. Depending on the specific conditions employed in the calculation, it appears that the scenario leading to 2760 btuh reflects a more direct impact from afternoon sun, maximizing heat gain through that window section.