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Energy codes for residential buildings in India prescribe design guidelines for each climate zone. However, these guidelines are broad and similar for different cities under the same zone overlooking climatic variations due to altitude, location and other geographical factors.

To develop strategies addressing the city-specific requirements, a stepwise simulation approach was used. Integrated Environmental Solutions–Virtual Environment (IES-VE) was used to create a prototype of a singly detached residence. The applicability of strategies is studied during the day and night times. Optimum orientation, the thickness of insulation, Window–Wall Ratio, the impact of cross-ventilation and shading depth are determined for two cities – Tiruchirappalli and Coimbatore under the warm-humid climate zone of India.

Results indicate that optimum insulation thickness and WWR vary between both cities during daytime and night time. In Tiruchirappalli, roof and wall insulation using polyurethane board (100 mm) and foam concrete (25 mm) offers a maximum reduction of 2.2°C indoors. Foam concrete (25 mm) insulation for roof and expanded polystyrene (25 mm) for walls reduce a maximum of 2.6°C during daytime in Coimbatore. Further, night ventilation with 20% WWR allows an average decrease of 0.5–0.6°C in triply exposed spaces facing the South. The use of a 2'0" depth shading device shows a maximum reduction of 0.1–0.3°C.

The contribution of this work lies in developing city-specific inputs presenting the advantage of easy replicability for other cities in the Indian context.

This paper aims to explore the efficiency of natural ventilation in the bedrooms of typical two-storeyed row houses with newly reconfigured design that incorporate rooftop wind catchers and side windows to create cross ventilation.

A CFD program was used to assess average air velocity coefficient (Cv) in 32 airflow cases. Parameters include location of openings with respect to wind direction, inlet-to-outlet area ratio (IOR) and opening-to-floor area ratio (OFR).

The results reveal that indoor air velocities in the cases of air entering wind catchers are generally higher than those in the cases of air entering side windows while air velocities at the openings are the opposite. The IOR of 1:2 provides best results in terms of both velocities of the indoor air and velocities at the openings. Increasing the OFR from 20% to 50% generally improves indoor air velocities and airflow rates.

This study proved that the new solution of combining one-sided wind catchers and side windows can effectively solve the problem of ventilation uniquely existing in the conditions of typical row houses by catching prevailing wind from two opposite directions into multiple rooms. The results are given as non-dimensional air velocities, which can be interpreted with any climatic data, and therefore can be applied to row houses in any locations and climatic conditions. The findings can create a new and efficient design of row houses that benefits building industry.

The paper aims to investigate and evaluate the impacts of the voids combination as a passive design feature on wind-driven ventilation performance in high-rise residential building units. It proposes a series of building models and thereon indoor ventilation performance and outlining why and how these building models designed with architectural design features are important. This study aims to provide a comprehensive understanding of how natural ventilation as a passive cooling strategy in living units of high-rise residential buildings can be applied through improving the provision of the architectural design feature of voids configurations.

The study was carried out through field measurements experiment and the computational fluid dynamics methods. A series of numerical simulations were carried out to calculate the indoor ventilation rate inside the case studies of the generated building models based on various variables such as horizontal voids type, size and wind directions.

The results indicate that the provision of a single-sided horizontal voids in building models can improve the indoor ventilation rate in units with cross ventilation mode up to 4 times, depending on wind direction and living unit location. The indoor ventilation performance in units located in models with single-sided horizontal voids is 17.54% higher than the units located in models without voids configuration. Furthermore, higher indoor ventilation performance was achieved in the case scenarios located at higher levels compared to the middle and lower levels in both horizontal voids types.

This study explores the application of voids combinations for natural ventilation performance, investigates the numerical simulation results and validates field measurements experiment data using CFD simulation.

After the outbreak of the disease of “Severe Acute Respiratory Syndrome (SARS)” in Asia in 2003, a healthy living environment is a major concern. The purpose of this paper is to study the value of healthy building parameters by the Contingent Valuation Method (CVM), which gives a direct appraisal of the occupants' value.

Healthy building parameters were identified in previous studies. Questionnaires are distributed to residents of a large‐scale high‐rise private housing estate in Hong Kong to find out their willingness to pay (WTP) for individual healthy building parameters.

The results suggest that most residents are willing to pay for healthy building parameters, each with a different value.

The paper is limited to studying the eight identified building parameters for healthy buildings. The sample of the study is confined in a private housing estate only and all the occupants are middle class citizens of Hong Kong. The results of the study can be further validated by carrying out similar research with the support of the government or quasi‐government bodies to cover a larger sample size for a better return rate.

The findings have practical implications on cost‐and‐benefit analysis of housing design.

Housing price is commonly regarded as the total value of a bundle of housing quality and environmental characteristics. The implicit price of individual quality and characteristic is often identified by the hedonic pricing model. However, its validity depends on a lot of econometric assumptions. The study is the first to be conducted after the outbreak of SARS in Hong Kong to gauge the opinions of residents on health/economy issues

Natural ventilation is an environmentally friendly effective way of improving thermal comfort and the quality of indoor conditions if applied properly. This study aims to investigate the physical mechanism of the air movement and also the influence of building geometry in a cross-ventilated room through a parametric study of window geometrical characteristics using computational fluid dynamics.

Momentum and continuity equations are solved by the control volume method using a commercially available software. Standard k−ɛ turbulence model is employed to simulate the incompressible airflow and SIMPLE algorithm to solve the conservation equations. Mean air velocity magnitude is measured at three different surfaces of different heights, and the effect of incoming wind velocity inside the building is studied.

The research concluded that window hood and sill projections reduce indoor wind velocity magnitude, play a major role in incoming wind direction and thus have a crucial impact on wind circulation and indoor air quality.

The paper has evaluated redesigning of a both practical and ornamental architectural element named Palekaneh, which is found in many historical buildings in several hot places in the world. Its optimal design could increase indoor natural ventilation quality and decrease a space's cooling load. Therefore, a new passive cooling architectural element could be re-introduced to the regions previously enjoying such ornaments. This is economically efficient because it eventually saves a considerable amount of energy in the long run and is socially important because of the revitalization of architectural identity.

The role of a building envelope's physical features, although being studied for solar absorption and daylight availability, has rarely been investigated for natural ventilation, especially in a small scale, thus making the paper novel in this regard. This provides a guideline for designers to assess the impact of their design on redirecting wind-induced natural ventilation the very early stages of design.

The purpose of this paper is to investigate the degree of willingness of property developers to invest in green features in Abuja, the federal capital city of Nigeria, to determine the level of their preparedness for green building development.

Data were elicited from the property managers of the various property development companies through self-administered questionnaire and analyzed with the use of frequency distribution, percentages and measures of developers’ willingness to invest index.

The study showed that the developers’ level of willingness to invest in green features is above average with the value of willingness indices on most features rising above 2.5 on a five-point scale. Features that are less capital intensive such as “Location of air intake that are far from source of pollution” (RWI = 4.14) and “Building design that utilize natural and cross ventilation” (RWI = 4.12) attracted higher developers’ level of willingness than features such as “Mechanical ventilation of enclosed parking area” (RWI = 2.15) and “Design for energy efficient deconstruction and recycling” (RWI = 1.84) that are more capital intensive. In addition, the index of willingness (relative willingness index of developers) on features that are associated with occupants’ comfort is higher than the index of willingness on features that confer more of environmental benefits.

The study concludes by advocating that parliamentary arms of all tiers of government should formulate environmental policies and laws that will entrench sustainable practices in the building industry in the country.

This is one of the few studies on the willingness of major stakeholders to invest in green features, particularly in the Nigerian context.

Fresh out of the two-century-old British legacy, Bangladesh, formerly known as East Pakistan from 1947 to 1971, was searching for a post-colonial architectural style. Colonial architecture in the region in general often imposed imported European elements, ignoring the preceding legacies of the Sultanate and the Mughals. The critical challenge was to find a balance between the prevailing high modernism in architecture and the local vernacular and climatic forces. The Pakistani government invited international architects to fill the gap left by a non-existent local architectural industry. Unfortunately, their work has rarely been properly analyzed. With selected case studies, this paper analyzes their work in an attempt to explore their contribution to creating a national architectural identity.

This study uses a case study approach with selected architectural projects from the period. It uses research tools such as systematic analysis of drawings, volumes and photographs and archival research.

The international architects took inspiration from the strong vernacular and climatic forces of the region. The resultant expressions of the two-decade-long search in their combined body of work are some of the finest examples of vernacular and climate-responsive architecture in the region. They transcended the regular international style and became context-specific and unique. The quest for East Pakistan's post-colonial architectural identity was partially met by the newly found identity through vernacular and climate-responsive adaptation in architecture.

This study explores how a unified vernacular and climate-responsive adaptations potentially shaped the post-colonial architectural identity of the region. No prior study exists on this issue for the time period.

The purpose of this research is to review the regulatory framework for natural ventilation design affecting the health of residents, to identify the relationship between the main components of the indoor environmental quality (IEQ) and current building designs, and to propose improvements to the design standards or guidelines especially for those related to natural ventilation controls.

Building designs can influence the IEQ and therefore, legislation regulating such designs should be reviewed beforehand. Afterwards, site measurements to vacant residential building blocks on two different sites are carried out to collect radon levels contained in the air within the buildings. The major purpose of this measurement is to find out the relationship between radon concentration and residential building designs.

It is found that there is room for improvement in the building laws in Hong Kong regulating building designs which affect natural ventilation and IEQ.

This paper contributes to the understanding of the practical needs of the construction industry and may remedy any lack of consideration of commercial reality in the research process.

This paper focuses on the evolution of and changes in French colonial architectural designs over time in terms of the use of vernacular architectural features of Vietnam.

It first examines the underlying principles of spatial compositions behind traditional vernacular architecture, thus revealing vernacular architectural values that have survived from the past. Styles of vernacular houses differ by region; thus, their unique spatial characteristics are analyzed by selecting the typical houses in each region. The study also illuminates ecological features and technical norms tailored to the local climate and Vietnamese traditional architecture. It examines how local and regional characters of vernacular houses affect the developments and changes in the French colonial public buildings in Vietnam, forming an identity that represents an eclectic Indochina style with the adaptation of local discourses on climate.

The Vietnamese have developed unique architectural styles that are inextricably linked to their identities, cultures, climates and livelihoods – for example, vernacular houses. Although at the beginning of the colonial period, the French imported their styles, decorations and details, which were foreign to the Vietnamese, later, they perhaps realized that such direct import was no longer suitable for the natural and socio-cultural situation of the colony. Toward the end of the colonial period, it is noticeable that French colonial architects gradually started using local design principles.

Although many existing buildings can be further added for the discussion, we limit a few cases, due to the length of the paper.

This paper proves that toward the end of the colonial period, colonial architecture in Vietnam became increasingly localized, adapting to the local environment and climate. The buildings during the period were gradually associated with Vietnamese culture and sentiment.

Although few papers deal with the vernacular architecture in Vietnam with regard to local climate and regional characteristics, there are no paper that related the vernacular Vietnamese houses to influence the French colonial designs in Vietnam. Therefore the paper has value and significance.

7. The cowsheds in Denmark are very similar in design to the more modern cowsheds in this country. They are, however, in general structurally superior to the average English cowshed and even to the Dutch cowsheds. In Denmark the flooring, standings, mangers, water supply, electric lighting, drainage from the cowsheds and devices for securing the cows are similar to what we observed in Nederland and equally satisfactory, but the Danish cowsheds were superior in respect of air space, windows and ventilation. In all the cowsheds which we visited the ceilings were high, the air space was ample, lighting by means of windows was good and adequate, cross ventilation was invariably provided. The gutters in Danish sheds are, however, much shallower than those in Dutch sheds, and are consequently not so effective, though movement of the cows is easier and safer.