|
|
|
Cellular Vertical Shade | Energy Efficiency | Cellular Design Idea's | Warranty
energy efficiency
R-Values
R-value measures resistance to heat flow. The higher the
R-value, the, more insulation the material provides. A typical exterior wall, including
framing, sheathing, fiberglass insulation and drywall, has an R-value of about 15. The
building components which provide the least resistance to heat flow are windows. A typical
double-glazed window (two panes of glass) has an R-value less than 2.
Park Avenue Drapery products can significantly increase a window's R-value, thereby
reducing both the amount of heat lost in winter and the amount of heat gained in summer.
In the example below, Duette® 3/4" opaque fabric increases the winter R-value of a
double-glazed window to 4.17 and its summer R-value to 3.33. This provides two benefits:
lower utility bills and an increase of the home's comfort level. |
 |
|
|
| Summer Shading Coefficient
Summer shading coefficient measures the amount of radiated
heat passing through a covered window versus a bare window. The lower the number, the less
heat is transmitted. In the summer, less heat transmission means a cooler room.
A bare single pane window has a summer shading coefficient of 1.00. In the example
shown at the right, Duette 3/4" opaque fabric has a summer shading coefficient of
0.36 with a double-glazed window. The difference can be felt on your skin when sunlight is
passing through the window by first raising and then lowering the shade
|
 |
Sound
Absorption and UV Protection
|
|
Have
you ever tried to carry on a conversation in a bare, empty room? The sound reverberates
too much, making the words difficult to understand. This excessive reverberation results
from reflected sound waves, bouncing off the walls, windows, and floors.
Carpeting and furniture help to absorb sound, as do most Park Avenue Drapery window
coverings. Sound absorption helps make the living environment quieter and more pleasant.
Ultraviolet (UV) is the range of radiation that is responsible for colors fading. Window
coverings can prevent harmful ultraviolet (UV) rays from entering the home's interior and
fading its furnishings.
UV blockage is measured in percentages. Typical semi-opaque and opaque Park Avenue Drapery
window coverings block 98% to 99% of all ultraviolet rays |
|
In
the example shown above, the opaque fabric has a sound absorption of 0.40. The higher the
number, the more sound is absorbed. A measurement of 1.00 would indicate total sound
absorption.
|
|
|
|
