Product Guide Exterior Sun Control Exterior shades come in a huge variety of colors and styles. They very effectively reduce glare and unwanted solar heat gain; some products will still allow a filtered view through the window Photo: Amie Walter Behind the recommendations Related articles Behind the recommendations Related articles Exterior Sun Control These exterior shading devices and lightshelves improve comfort and energy performance. More about Exterior Sun Control Making Windows Work Better How to choose curtains, solar screens, awnings, and storm windows? The options are dizzying, but the right choice can cut energy bills. Doing Daylighting Right Harvesting daylight is a popular way to save energy and promote productivity. But getting it wrong is all too easy—and can have the opposite effects. Cost-Effective Window Attachments: A Practical Guide 4 Resources Help Draw the Shades on Poor Window Performance Fixed Awnings' Heating Penalties Can Overshadow Savings