In the winter, as much as 40% of the heat that escapes a home flows through the windows. During the summer, heat from the sun's rays coming through the windows can make it harder to keep a home cool. Energy-efficient window treatments can help decrease heat loss and heat gain, thereby reducing heating and cooling costs.
The RED AREAS in this thermal image show the energy loss from this home. The more energy efficient the window coverings, the less energy and the less cost it takes to heat and cool a home:
NO WINDOW COVERING
WITH ENERGY SAVING
R-value is a measure of a product's ability to resist heat flow, which is especially important in the cool winter months. The higher the R-value number, the more insulation it provides and the better it is at reducing heat loss.
A bare, low-e double-glazed window has an R-value of about 3.5. Add a properly installed Duette® Architella 1-1/4" honeycomb shade with Panache opaque fabric and the R-value peaks at 7.86, more than doubling the energy efficiency and reducing heat loss by over 50%.
Solar Heat Gain Coefficient (SHGC) is the amount of solar heat that passes through a window, where 0 = none and 1 = all. The lower a product's SHGC, the less solar heat it transmits, which can help a home stay cooler in the warm summer months.
The SHGC of a bare, double-glazed window is 0.76, which means 76% of solar heat is transmitted through it. Add a Duette® Architella 1-1/4" honeycomb shade with Elan opaque fabric and the solar heat gain coefficient drops to 0.15 - only 15% of the solar heat is transmitted.
UV exposure is not only harmful to skin, it can also damage furnishings, floors, and fine art. Most Hunter Douglas products have fabric options that filter out 99% of these harmful rays in the closed position.
Many Hunter Douglas window fashions, including Silhouette® window shadings and Luminette® Privacy Sheers, filter out as much as 86% of harmful UV rays in the open-vane position.