Drapes are often missing from more contemporary home designs. People may prefer to leave windows bare so light can flood in. Others rely solely on blinds. This looks beautiful and is great on winter afternoons and for lighting the home. However, in the warmth of summer, covering that window can help to create a more energy efficient living room. This is because you won’t need to turn up the AC.
If you really do prefer to keep the windows bare, then consider upgrading the glass. You can get windows that are Energy Star qualified. These help to block some of the UV rays coming in on warm days and add an extra barrier against cold air during the wintertime. This can save you as much as $500 per year on the cost of cooling and heating your home.