Final answer:
An NFRC label with a SHGC of 0.3 indicates that the window allows 30% of solar energy to pass through, impacting a building's temperature and energy efficiency.
Step-by-step explanation:
An NFRC label on a window that shows a SHGC of 0.3 describes the window's Solar Heat Gain Coefficient. This coefficient indicates the fraction of solar radiation admitted through the window, both directly transmitted and absorbed, and subsequently released inward. A SHGC of 0.3 means that 30% of the solar energy striking the window is transmitted into the room, which can affect the cooling load and comfort level in the building. Typically, in warmer climates, a lower SHGC is preferable to reduce cooling costs, while in colder climates, a higher SHGC can contribute to passive solar heating.
An NFRC label on a window that shows a SHGC of 0.3 describes the Solar Heat Gain Coefficient (SHGC) of the window.
The SHGC is a measure of the amount of solar radiation that enters through the window and contributes to heat gain inside the building. A SHGC of 0.3 means that 30% of the solar heat is transmitted through the window, while 70% is reflected or absorbed.
A lower SHGC indicates that the window has better insulation against heat gain from sunlight, which can help improve energy efficiency and reduce cooling costs in hot climates.