I want to live a comfortable and eco-friendly life. If you feel that way, please learn about "passive design" before you start building your house. In summer, block the sunlight and allow plenty of wind to pass through. In winter, let in the sun's heat so that the room stays warm until night. Throughout the year, let sunlight brighten the inside of the house. It's a design method that utilizes the power of nature to the fullest by making a few small adjustments to the house's structure without spending a fortune. Passive design is essential for building a truly eco-friendly home. ■Contents Prologue: A Selfish Mom's Homebuilding Chapter 1: Home Energy Chapter 2: The Basics of Eco-Friendly Homes that Utilize Natural Power Chapter 3: Home Layout and Shape Chapter 4: Highly Recommended! Tips for "Comfortable" Room Layout Chapter 5: Amazing Effects! Window Innovations Chapter 6: How to Choose Eco-Friendly Equipment Chapter 7: Living in an Eco-Friendly Home Appendix: Illustrated Guide to Truly Amazing Eco-Friendly Homes