Technical Data

Note: All values calculated using Window 5.2. (See http://windows. lbl.gov/software/window/window.html and http//windows. lbl.gov/materials/igdb/ for more information on glass optical data and the Windows 5.2 program.) Emittance of ordinary low-e is 0.20.

Solar Heat Gain Coefficient – (SHGC). The amount of solar radiation that enters a building as heat. The lower the number, the better the glazing is at preventing solar gain.

Fading Transmission – The portion of energy transmitted in a spectral region from 300 to 700 nanometers. This region includes all of the ultraviolet energy and most of the visible spectrum, and will give the best representation of relative fading rates. The lower the number, the better the glass is for reducing fading potential of carpets and interior furnishings.

U-Factor – This represents the heat flow rate through a window expressed in BTU/hr/ft2/°F, using winter weather conditions of 0°F outside and 70°F inside. The smaller the number, the better the window system is at reducing heat loss.

Cardinal actively supports and participates in The National Fenestration Rating Council (NFRC). Windows with Solar Maxx that are rated and certified by the NFRC can comply with Energy Star™ requirements for all climates in the country. (See http://www.energystar.gov/products/windows/ for more information on the Energy Star windows program.)