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SPACE-The First Adoption of the Korean Ondol Principle in Usonian Houses: Jacobs House I, designed by Frank Lloyd Wright
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Usonian house floor plan, by Frank Lloyd Wright. Central fireplace. Designed for efficiency. | Frank lloyd wright design, Usonian house, Architectural floor plans
![Examples of American architecture; A) The Butler House B) The Newbold House C-D) Window & Plans, The Robie House E) The Jacobs House F) The Tremaine House: plans | RIBA pix Examples of American architecture; A) The Butler House B) The Newbold House C-D) Window & Plans, The Robie House E) The Jacobs House F) The Tremaine House: plans | RIBA pix](https://www.ribapix.com/images/thumbs/029/0297508_RIBA100997_600.jpeg)