Windows are a considerable source of heat entering into a house and cool air escaping from it. Setting up solar screens over windows can obstruct as much as 70 percent of the sun's rays from entering into a house. See to it that you install these solar screens on all eastern and western exposure windows to block early morning and late afternoon solar energy. More recent window technology provides glazing that blocks most of the sun's heat rays. Always close windows throughout the best hours of the day to keep the most popular air from going into your home.
Raise your interior temperature when you're not at home and throughout the overnight hours. When you are at home, keep the thermostat at 78 degrees or greater. You might be shocked at how comfortable you can be at greater temperature levels as long as your HVAC unit gets rid of the humidity from the air. You could save up to 15 percent on your general expense just by raising your thermostat a couple of degrees when you are not in the house.