Effective Daylighting with High-Performance Façades
This new book by Kyle Konis and Stephen Selkowitz, published by Springer, makes a clear case for the importance of careful design consideration of daylighting and building performance. Focused on how to move design practice to performance-based design, use context-aware and adaptive shading systems, and follow through with post-occupancy validation and feedback, this book is clearly written and thorough, addressing the importance of daylight and views to occupants and of mitigating the negative impacts of fenestration.
The authors explain the value of daylighting from both the energy use (grid demand) and human well-being (circadian system) perspectives. They make the case for daylighting effectively as a central issue for Zero Net Energy (ZNE), meeting greenhouse gas emission standards, and improving indoor environmental quality. The importance of clear daylighting objectives and feedback mechanisms throughout the design, delivery, and operational stages of the project are stressed, allowing for innovation and integration of systems while keeping industry risk low. This book focuses on daylighted space performance through occupant behavior and subjective assessment of sufficiency, views, and visual and thermal comfort. The authors are clear about the challenge of creating integrated systems that can deliver occupant comfort while meeting energy performance goals and they present emerging strategies to leverage internet-connected sensing devices to create responsive buildings.
The metrics chapter discusses various design issues—Climate Based Daylight Modeling (CBDM) and Spatial Daylight Autonomy (sDA); the effect of daylight on the human circadian system, which is included in standards such as the WELL Building Standard; glare and visual comfort; the biophilic importance of views, glazing, shading elements and their measurements in the LEED standards; occupant thermal comfort; and the importance of including design performance metrics at the beginning of a project.
A chapter on innovative daylighting systems promotes the development of complex fenestration systems that are dynamically interconnected and include occupant feedback. The discussion goes into applications for specific products, their performance, and their scalability; building-integrated photovoltaics; dynamic façades; smart glazing; light redirecting systems; interconnected systems through internet-of-things-enabled controls (including occupant feedback and control); and providing personalized occupant control for lighting and glare.
The performance-based design chapter explains the iterative process of whole building integrated design and looks at the current simulation tools and how to use them. It has clear diagrams showing tools, workflows, determining occupant behavior, and impact of the site. The authors note an interest in both physical and virtual reality mock-ups.
A case study chapter presents in-depth information on six large ZNE commercial buildings located in different climates and contexts. There are many helpful illustrations which clearly link to the book’s discussion on daylighting and controls.
The final chapter focuses on the importance of validating daylight performance from the perspective of the occupants—validating design assumptions by comparing performance to intent. There is an example of a desktop polling station to enable comparison of occupants’ subjective assessments to actual conditions.
This book is well written—easily understandable by students as well as professionals. It has clearly labeled pertinent graphics including diagrams, graphs, images, and examples from built projects located primarily in the USA and Europe. The authors have done an excellent job of presenting daylighting issues, making it clear that they should be included in the initial design benchmarks for a project, studied through iterative design, and followed through with post-occupancy evaluations.