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Help Save Energy and the Environment Upgrade Your Windows with our ENERGY STAR® Qualified SolarZone™ Insulated Glass Package.

Comfortworld Windows are already designed for superior thermal performance. By choosing our SolarZone™ Insulated Glass Package, featuring PPG's Low -E Glass and Intercept™ Warm Edge Spacer System, you can help reduce your energy costs even more, while helping cut consumption of the fossil fuels that pollute our environment.

What Makes the SolarZone™ Insulated Glass So Effective?
Since 80% of a window is glass, substantial heating and cooling savings come from improved glass performance.
- Our combination of UV-filtering Low-E Glass, insulating argon gas   and the  Intercept™ Warm Edge Spacer System, creates   significant energy efficiency. Together they can cut the damaging   effects of the sun, which can lead to the fading of carpets,   curtains and furniture by an additional 78% over clear insulated   glass units.
- In winter, a warmer glass temperature is maintained, increasing   the R-value by an additional 104%
- In summer, a 48% reduction in solar heat gain helps cut air   conditioning costs.

The result: your monthly utility bills will reflect savings year round - and that should help make you even more comfortable.

The Benefits of the Intercept™ "Warm-Edge" Spacer System
The Intercept spacer system features a unique, one-piece metal alloy, U-channel design that creates an effective thermal barrier to help reduce conducted heat loss through the window. Its sealed, one-piece design makes Intercept spacers stronger and better at retaining insulating gas than many conventional designs.

Comfortable Rooms Start With the Intercept™ Spacers
Intercepts spacers are so energy efficient that they keep the edges of the window glass warmer, so your home feels more comfortable in the winter, As you can see below, the temperature difference between the edge of an insulating glass unit with an ordinary spacer, and one with an Intercept spacer system can be dramatic.

With Intercepter™	With Aluminum Spacer

Intercept I.G. units feature "Warm-Edge" technology that reduces condensation problems around the window perimeter. Compare the Intercept insulating glass window "above left" with a conventional insulating glass window "above right". Both windows have Low-E glass and argon gas infill. The difference is the Intercept "Warm-Edge" Spacer.

This thermograph or "heat picture" compares room side glass temperature for an Intercept I.G. unit (left, yellow is warmer, blue is cooler), and a conventional I.G. unit (right). Since the Intercept I.G. allows for significantly warmer glass temperature, especially at the edges, your home will feel more comfortable.

The Intercept™ Spacer Helps Your Windows Last Longer
Under normal weather conditions, I.G. units expand and contract with temperature changes. In conventional insulating glass units, the sealant (the material that holds the unit together) takes the stress of the flexing. This can cause seal failure and insulating glass loss. In an Intercept I.G. unit, the spacer flexes instead of the sealant, so it resists spacer movement and premature sealant failure.

Colder   Neutral   Warmer     Colder   Neutral   Warmer
Intercept spacers (top) flex instead of sealant during temperature changes. So they resist spacer movement and sealant failure.		With conventional aluminum spacers, the sealant flexes, which can lead to sealant failure and loss of insulation ability.

What to know when  window shopping!

The Solarban 60 Low-E Glass - Making the Difference
The Intercept Spacer System is just one way of increasing your window's performance. Solarban 60 Low-E glass, also from PPG is an excellent option for increasing your home's comfort and energy savings year round. Solarban 60 Low-E glass is created by applying a microscopic, undetectable metallic coating to the second surface of an insulated glass unit. This coating helps to block out solar energy in the summer while retaining furnace heat and allowing warm short wave solar rays in the winter.

Low-E glass filters long-wave radiation from the sun. This reduces solar heat gain from the sun in the summer... keeping your home cooler.		Low-E takes on a new duty in winter months. It lets warm solar rays into your home... while blocking the heat in your home from getting out.

The thermographs below clearly show the effect that Low-E glass has when contained in an insulated glass unit. The window on the left is a clear insulated glass unit. The heat transmittance, indicated by the green, yellow and orange colors from the heat scale, is far more apparent than that of the window containing the Solarban 60 Low-E insulated glass unit.

Heat Photographs (Infrared Thermography)
Standard Clear Insulating Glass	PPG Solarban®60 Insulating Glass

Measuring Heat Loss through U-Values
For all window products the National Fenestration Rating Council (NFRC) has created the NFRC-100, which is the standard test for heat loss through a fenestration, or window product. Once the testing procedure is completed, a U-Value rating is applied to the window product. The lower the U-Value, the better the product is at resisting heat loss. This chart easily illustrates why a window made with Solarban 60 Low-E glass will thermally outperform windows with any of the lesser glass products.

Energy Efficiency, It All Adds Up
Simply put, there are many options available for improving the performance of a window. By adding Low-E glass to a standard insulating glass unit, you can improve the energy performance of your window year round by 24%. Additionally, by adding argon gas filling to the window, which is a better insulator than normal air, you can increase the efficiency by another 6%. And finally, by adding the Intercept™ Warm Edge Spacer System, you can add yet another 5% to the overall efficiency of our window. So, wouldn't you agree that when you add all of these together, by choosing Comfortworld windows with the SolarZone™ Insulated Glass Package, you have chosen the most energy efficient window product on the market today?

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