![]() A product with a low SHGC rating is more effective at reducing cooling loads during the summer by blocking heat gain from the sun. A product with a high SHGC rating is more effective at collecting solar heat during the winter. The lower the SHGC, the less solar heat it transmits and the greater its shading ability. Solar heat gain coefficient (SHGC) is the fraction of solar radiation admitted through a window, door, or skylight - either transmitted directly and/or absorbed, and subsequently released as heat inside a home.The lower the U-factor, the more energy-efficient the window, door, or skylight. NFRC U-factor ratings, however, represent the entire window performance, including frame and spacer material. For windows, skylights, and glass doors, a U-factor may refer to just the glass or glazing alone. U-factor is the rate at which a window, door, or skylight transmits non-solar heat flow.These properties can be measured and rated according to the following energy performance characteristics: The solar radiation into a house, which is converted to heat when absorbed by building surfaces.Thermal radiation into a house and out of a house from room-temperature objects, such as exterior walls and windows, people, equipment, furniture, and interior walls.Direct conduction and convection heat transfer through the glass or multi-layer glazing and framing.Windows, doors, skylights can gain and lose heat through: ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |