Residential Book Bundle with Passivhaus - Residential, House Extensions, Loft Conversions and Passivhaus. The 4 Book Package includes: Understanding Architectural Details - Residential in PDF format Understanding Loft Conversions - PDF format House Extension Details - PDF format Understanding Passivhaus - PDF format 2D details in CAD format as dwg files (version 2010) 3D details in SKP format for SketchUp (version 2024) Details:Calculated book that accompanies Understanding Passivhaus in PDF format Flixo files associated with Details:Calculated UK construction standards and methods Details drawn in metric units System Requirements: Please note this package includes pdf, .skp and .dwg files which are large in size. Make sure you have a good internet connection, and download the files to a laptop or pc for best results.