External window shutters. If fitted tightly, shutters are almost equally as effective at both reducing heat loss and heat gain. Overall energy efficiency depends on how often these insulated window coverings are actually used.

Insulating window blinds and shades. Cellular shades and honeycomb shades can halt up to 86% of heat gain and 80% of heat loss.

Interior storm windows. These are as effective as double-paned windows, reducing winter heat loss by 50% or more.

Insulating window blinds and shades. The use of pleated fabrics will trap and insulate household heat very effectively. They also reduce chilly drafts, which will increase the comfort factor in your home.

Outdoor window shades or roller shades. These products can reflect almost 85% to 95% of solar heat during the spring and summer months. Individual energy savings will also depend on placement and how often these solar sun screens are used.

Window Awnings. These products shade windows, doors and patios like giant umbrellas. Window awnings can prevent as much as 77% of solar heat gain, significantly reducing home cooling costs.

Indoor window shutters. These are becoming more popular for their classic decorative appeal, but they are also very effective at blocking and absorbing solar heat.