Each of the energy-saving renovation strategies listed on this Web site is given one or more of five designations: daylighting, heating, ventilation, cooling, or power. These categories describe what the strategies are best used for; in other words, is it going to help you with ventilating and heating your home, or just with cooling? Will it help you incorporate renewable energy, i.e. power? And so on. The five categories are shown here with their respective icons.