The rate at which a window, door, or skylight conducts non-solar heat flow.
NFRC U-factor ratings, however, represent the entire window performance, including frame and spacer material. The lower the U-factor, the more energy-efficient the window, door, or skylight.
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 SHGC, the less solar heat it transmits and the greater its shading ability.
A fraction of the visible spectrum of sunlight (380 to 720 nanometers), weighted by the sensitivity of the human eye, that is transmitted through the glazing of a window, door, or skylight.
A product with a higher VT transmits more visible light.
Condensation Resistance (CR) measures how well a window resists the formation of condensation on the inside surface.
The higher the number, the better a product is able to resist condensation. CR is meant to compare products and their potential for condensation formation.
The NFRC rating is highly determined by the glass package, therefore we can not specify the ratings by product type.
For more detailed windows/doors information, you could locate them through the NFRC certified product directory website.
*Note to select the manufacturer as Value windows & doors and corresponding window type