- ❐ 9000 Series Double Glazed
- ❐ 9003 Series Triple Glazed
- ❐ 9100 Series Flush Glazed
- ❐ 4500T Series Sliding Door
- ❐ 4503 Series Lift & Slide Door
- ❐ 9502 Series Double Glazed Swing Door
- ❐ 9503 Series Triple Glazed Swing Door
- ❐ 5000T Series Residential/Light Commercial
Rate of heat flow through the complete heat barrier, from room air to outside air. The lower the U-factor, the better the insulating value. The U-value is the reciprocal of the R-value.
SHGC (Solar Heat Gain Coefficient)
The SHGC is a rating which is now generally replacing the shading coefficient, measuring a window's ability to transmit solar heat. It measures both the solar radiation which is directly transmitted, as well as the solar radiation absorbed by the glass and subsequently transmitted. The lower a unit's solar heat gain coefficient, the less solar heat it transmits, and the greater is its shading ability. The solar heat gain coefficient is approximately equal to the shading coefficient divided by '1.15' and is expressed as a number without units between 0 and 1.
VT (Visible Transmittance)
A fraction of the visible spectrum of sunlight (380 to 720 nanometers), weighted by the sensitivity of the human eye, that is transmitted through a window's, door's, or skylight's glazing. A product with a higher VT transmits more visible light. VT is expressed as a number between 0 and 1.