Energy can be saved in homes by adopting the following measures: Using renewable energy devices/systems such as solar water heaters, solar cookers, solar lanterns, solar home systems, solar generators, and other devices; Retrofitting some components of
solar passive architecture, for example, sunshades, double glazed windows, smart glazing, window overhangs, roof treatments, ventilation, evaporative cooling, and day lighting, depending on the climatic zone where the house is constructed.