The main source of heat gain through windows in the warmer months is from sunlight. Here are some tips for handling the sun that will help keep your house cool.

• Install white window shades or mini-blinds. It's a simple, old-fashioned practice. Mini-blinds can reduce solar heat gain by 40-50 percent.

• Close south and west-facing curtains. Do this during the day for any window that lets direct sunlight in.

• Deciduous trees block summer sun, but drop their leaves to allow half or more of the winter sun's energy to warm you on clear winter days.

• Another good, old-fashioned solution is to install awnings. Awnings work best on south-facing windows where there's insufficient roof overhang to provide shade.