How We Measure Up
Thermal Performance Ratings:
escaping a home or buidling. U-Factor ratings
generally fall between 0.20 and 1.20. The lower the
U-Factor, the better a product is at keeping heat in.
The U-Factor is particularly important in
sun. SHGC is expressed as a number between 0 and
1. The lower the SHGC, the better a product is at
blocking unwanted heat gain. SHGC is particularly
important in southern climates.
VT is expressed as a number between 0 and 1. The
higher the VT, the higher the potential for daylighting.
glazing system to reduce the potential for
condensation. The higher the condensation
resistance factor, the more efficient the window
and glazing system.
Family of High Performance Glass
The glass in a window is referred to as an Insulating Glass (IG) unit. Panes of glass are held together by a spacer. This creates
an insulating air space between the panes. We offer IG unit choices to block damaging ultra violet rays, block the cold and hold
your warmth. According to the U.S. Department of Energy windows could account for 10% to 25% of your energy bill. Windows
manufactured with Low-E glass and argon gas to replace your single pane windows that have clear glass will reduce your
are not. Your energy dollars could be leaking out of your window frames.
If they are not filled with ENVIRONMENTAL GREEN™ polyurethane
foam - the same type of foam that insulates your refrigerator and thermos.
Our window frames insulated with ENVIRONMENTAL GREEN™ foam give you:
• Increased Energy Savings
• Lowers the U-Value which increases thermal performance
Maximize your window energy efficiency. Insist on ENVIRONMENTAL GREEN™
polyurethane foam-filled window frames.