● Introduction With a home that maximizes the power of nature, air conditioning is unnecessary. By cleverly designing the building's shape and the placement of windows, you can harness natural energy (heat, wind, light, etc.) to create a comfortable and healthy living environment. This guide explains the know-how with lighthearted illustrations, offering a practical guide to building and living in such a home. It includes many practical examples, such as "How to bring cool breezes in through the windows" and "How to efficiently block direct sunlight."