Vertically stacked and set into a hillside this Malibu house constructed of environmentally friendly and recycled materials. It has brick red color and structure designed to minimize energy use and maximize solar energy using. Passive solar homes range from those heated almost entirely by the sun to those with south-facing windows that provide some fraction of the heating load. The difference between a passive solar home and a conventional home is design. The key is designing a passive solar home to best take advantage of your local climate. It has photovoltaic panels on the roof and concrete floors which gather sun’s energy during the day and releasing it at night.