In this module, we introduce the case study building used throughout the course: the Margaret Esherick House, designed by architect Louis I. Kahn and completed in Philadelphia in 1961. This compact, geometrically simple residence provides a clear framework for analyzing the environmental performance of architecture. We explore its spatial configuration, solar orientation, and material composition, situating the house within both the mid-century solar design movement and the broader trajectory of modern architecture. The module also introduces the simulation methods in the second technical section, used to study the thermal behavior of buildings. We examine two primary models developed for the course—one focused on spatial and material characteristics, and the other on thermal performance. Through these tools, we demonstrate how modeling can be used to isolate and evaluate the impact of specific building elements, such as windows, massing, and insulation, helping designers make informed, climate-responsive decisions.

In this module, we examine the opaque elements of the building enclosure—walls, roofs, floors, and other non-transparent surfaces—which form the first line of defense in regulating interior temperatures. We trace the historical evolution of these enclosures across the twentieth century, focusing particularly on the introduction of insulation and the shift in construction practices it enabled. Through comparative examples like the Esherick House and contemporary high-performance buildings, we explore how changing expectations of energy performance transformed material assemblies and led to today’s standards for airtight, well-insulated construction. In the second technical section, we turn to the physics of heat transfer and the concept of building “lossiness”—the rate at which heat escapes through the envelope due to temperature differences and air leakage. We examine how individual material properties combine to form composite thermal assemblies, and how this performance can be quantified. The module concludes with an introduction to the Thermal Balance Point, a key metric that incorporates internal heat gains from occupants, equipment, and lighting to determine the tipping point at which heating or cooling becomes necessary. This measure helps us distinguish between different building types and their environmental responsiveness.

In this module, we examine the selective properties of building enclosures, focusing primarily on glazing systems and their role in controlling solar radiation and heat flow. Glass plays a unique role in architectural design by allowing short-wave solar radiation to enter while retaining interior heat in the form of long-wave radiation. We trace the evolution of glazing from the early 20th century to the present, looking at how innovations in transparency and insulation have influenced building form, environmental performance, and occupant comfort. Special attention is given to how new glazing technologies enabled modernist experimentation and shaped emerging typologies. In the second technical section, we delve into the technical properties of glass and its various configurations. We examine the material science behind transparency, emissivity, and thermal resistance, along with how glass interacts with shading devices and operable elements. Through these discussions, we explore how glazing systems mediate between interior and exterior climates, and how their careful selection and design can significantly impact energy use and thermal comfort.

In this module, we explore the concept of thermal mass—the ability of materials to absorb, store, and release heat—and its essential role in bioclimatic design. We begin with historical and vernacular examples, such as adobe and stone construction in hot climates, where thick, massive walls were used to buffer interior spaces against extreme temperatures. These examples illustrate how thermal mass can delay and dampen heat flow, helping buildings stay cooler during the day and warmer at night by shifting heat gains across time. In the second techincal section, we then examine how thermal mass can be applied in contemporary design to enhance comfort and reduce energy use. Through diagrams and simulations, we study how building elements like walls, floors, and roofs act as thermal batteries, and how their performance depends on material properties, placement, and climatic context. The module concludes by exploring design strategies that integrate mass with passive or hybrid systems, while addressing the limitations and opportunities of using thermal storage across different building types and environments.

In this module, we synthesize the core principles of bioclimatic design—thermal mass, selective envelopes, and glazing—to explore how buildings can actively respond to changing climatic conditions. We examine the environmental logic behind responsive architecture, using case studies such as highly insulated passive houses and open-air bamboo dwellings to illustrate how spatial design and material systems enable real-time adaptation. Particular emphasis is placed on the operation of windows, shading devices, and ventilation openings based on their thermal perceptions and behavioral habits. In the second technical section of the module, we extend this framework to consider automated and sensor-driven systems that support dynamic building performance. By introducing the concept of feedback loops and environmental sensing, we investigate how climate-responsive buildings can maintain comfort while minimizing energy use. The module concludes by positioning building adaptability as a continuous negotiation between environmental forces, technological mediation, and human agency.

In this concluding module, we reflect on the integrated strategies of bioclimatic design and explore how they can be extended to address remaining comfort challenges. Building on the lessons of earlier modules, we revisit the case study of the Esherick House to evaluate its performance under real climate conditions. While passive design strategies can achieve comfort much of the time, we consider what can be done during the remaining periods when internal temperatures fall outside the comfort range. The module challenges students to ask: What additional environmental resources can be tapped? And how can we design buildings that make intelligent use of them? In the second technical section, we investigate strategies such as natural ventilation, night flushing, evaporative cooling, and the use of phase change materials, among others, as low-energy supplements to passive systems. We also examine the thresholds at which buildings may need to turn to mechanical assistance and the implications of doing so. The emphasis is on extending the bioclimatic approach without defaulting to conventional high-energy solutions. By the end of the module, students are equipped with a broader palette of strategies for designing buildings that are not only efficient and climate-responsive, but also resilient in the face of environmental variability.