The Warm Window fabric consists of four layers of different fabric quilted together in 4"-wide lengthwise channels designed to reduce the flow of energy through your window glass. The layers are:
The Warm Window System - How it Works
- Lining with fabric protector High density needled holo fibers Reflective polyethylene moisture vapor barrier
- Metalized poly film with air-trapping fibers
You will cover the side of your Warm Window shade that faces the room with a decorative fabric of your choice. Choose a cover fabric that is tightly woven, of light to medium weight, and made of cotton or a cotton/polyester blend. Fabrics with fabric protector are an excellent choice for window coverings. Avoid highly textured or pile fabrics and loosely woven or stretch fabrics. You should also avoid fabrics with horizontal stripes as they may interfere visually with the folds in the shade.
The system is complete with a magnetic seal achieved from sewing magnetic strips into the seams of the shade and affixing magnetic tape to the window frame or wall.
How does the system work?
Warm Window insulated shades are carefully engineered to combat all four major causes of heat loss.
- Conduction is reduced by trapped air spaces between the fibers and layers of insulated fabric. Infiltration is reduced by the impervious polyethylene and tight magnetic edge seal. Convection is reduced by the magnetic edge seal.
- Radiation is reduced by the reflective metalized poly film which reflects radiant heat back into your home and also reflects away solar gain in summer.
What is R-Value?
The effectiveness of any material in preventing energy from flowing through it is defined in terms of R-value. The higher the R-value of a given material, the greater its insulating capacity. This chart illustrates some R-value comparisons.
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