Windows are one of the most overlooked aspects of energy efficiency in your home. Window coverings greatly improve the insulation value of your windows. Closing window coverings when it is hot or cold out or when the room is not in use will cut down your utility bills.
The most popular insulative shades are the Honeycomb type. The most effective honeycomb shade is the Duette Architella made by Hunter Douglas. This blind features a honeycomb inside its honeycomb creating four layers of trapped air that acts as an insulation barrier doubling or tripling the insulative value of your window.