scholarly journals Effect of indoor environmental quality on visual comfort and productivity in office buildings

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Amit Kaushik ◽  
Mohammed Arif ◽  
Obas John Ebohon ◽  
Hord Arsalan ◽  
Muhammad Qasim Rana ◽  
...  
Keyword(s):  
Environmental Quality ◽  
Office Buildings ◽  
Maximum Effect ◽  
Visual Environment ◽  
Indoor Environmental Quality ◽  
Visual Comfort ◽  
Content Type ◽  
Occupant Comfort ◽  
Statistical Relationships ◽  
The Impact

Purpose The Purpose of this paper is to identify statistical relationships between visual environment and occupant productivity. Visual environment is one of the most important indoor environmental quality (IEQ) parameters, and it directly impacts occupant productivity in offices. The literature outlines the significance of the impact. Still, there is a lack of investigation, statistical analysis and inter-relationships between the independent variables (IEQ factors), especially in the hot and arid climate. Design/methodology/approach This study presents a research study investigating the effects and shows statistical relationships between IEQ on occupant comfort and productivity. The study was conducted in the Middle East, and data was collected for 12 months. It used the response surface analysis to perform analysis. Findings This study outlined seven unique relationships highlighting the recommended range, inter-dependencies. Results include that illumination has maximum effect on visual comfort and temperature, daylight having direct influence and relative humidity, wall type next to the seat and kind of workspace also impact visual comfort and productivity. These findings would help to improve occupant comfort and productivity in office buildings. It is recommended to include results and recommendations on design guidelines for office buildings. Originality/value This study presents the unique effects of non-visual IEQ parameters on visual comfort and productivity. This investigation also provides a unique method to develop the statistical relationship between various indoor environmental factors and productivity in different contexts and buildings.

The impact of workspace location and indoor environmental quality on employees' satisfaction within office buildings: A case study in Cairo

2020 ◽  
pp. 1420326X2094456
Author(s):  
Ahmed Khaled Aboulfotouh ◽  
Osama Tolba ◽  
Sherif Ezzeldin
Keyword(s):  
Environmental Quality ◽  
Subjective Evaluation ◽  
Office Buildings ◽  
Indoor Environmental Quality ◽  
Ongoing Research ◽  
Leed Certification ◽  
Perceived Satisfaction ◽  
Employees Satisfaction ◽  
Survey Responses ◽  
The Impact

Indoor environmental quality (IEQ) could influences employees' satisfaction and performance in office buildings. Previous research have suggested that factors such as gender, age, proximity from a window could influence employees' perceived satisfaction with IEQ. This study as a part of an ongoing research attempts to investigate the impact of workspace location on employees' satisfaction with IEQ parameters and overall satisfaction with personal workspace within office buildings in Cairo. Employees' subjective evaluation of satisfaction with IEQ parameters were collected using a questionnaire as a post occupancy evaluation survey. Responses were collected and quantitatively analysed using software package used for statistical analysis (SPSS). Diversity in levels of satisfaction among employees within the same building was found highly sensitive to their workspace location. Building orientation and external views could influence employees' satisfaction with IEQ parameters and overall satisfaction with personal workspace. Employees with highest perceived satisfaction with IEQ parameters and overall satisfaction with personal workspace seem to prefer their workspaces to be located on the ground floor, away from a window, either in the middle of the building or on the southern façade and not overlooking the courtyard. The study recommends that Leadership in Energy and Environmental Design (LEED) certification criteria should reconsider employees' satisfaction with IEQ parameters in developing IEQ credits and LEED certification process.

Enablers of incorporating indoor environmental quality (IEQ) principles into buildings

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Aba Essanowa Afful ◽  
Joshua Ayarkwa ◽  
Godwin Kojo Kumi Acquah ◽  
Dickson Osei-Asibey
Keyword(s):  
Construction Industry ◽  
Environmental Quality ◽  
Environmental Conservation ◽  
Corporate Image ◽  
Indoor Environmental Quality ◽  
Indoor Environments ◽  
Content Type ◽  
Wide Applicability ◽  
Global Construction ◽  
The Impact

PurposeThe aim of this study was to identify these enablers in literature and subsume them under broad categories for the development of a framework showing the interrelationships among the enablers.Design/methodology/approachFifty-four (54) relevant articles were desk reviewed from different construction peer-reviewed journals and published conference proceedings to identify 20 core enablers of incorporating indoor environmental quality (IEQ) into building designs.FindingsThe identified enablers include improved occupants' health, well-being and satisfaction, environmental conservation, high return on investments and co-operative methods of design and construction management among others. To better understand the enablers identified, they were classified into seven main interconnected categories: economic enablers, environmental enablers, occupant and end-user enablers, process enablers, corporate image, culture and vision enablers, client-related enablers and external enablers.Research limitations/implicationsThe interconnectedness brought to the fore a subtler appreciation of the drivers of IEQ, which could help expand current knowledge outside the narrow scope of isolated drivers. The fact that the papers selected in this study are not limited geographically underscores the wide applicability of the findings to the global construction industry.Practical implicationsUnderstanding that the enablers will enhance the adoption and design of quality indoor environments, help in building the capacity of consultants to adopt the design of quality IEs and reduce the impact of construction on the environment.Social implicationsThese identified enablers are not limited geographically and thus could promote the design of quality indoor environments globally, particularly in green building design. To the global construction community, this review presents a list of enablers that would expedite the adoption of principles of IEQ designs in buildings thus taking the global construction industry one more step towards sustainable built forms. Promoting the identified enablers would ultimately steer stakeholders to design and build better indoor environments.Originality/valueThe fact that the papers selected in this study are not limited geographically underscores the wide applicability of the findings to the global construction industry.

scholarly journals A Review of Balcony Impacts on the Indoor Environmental Quality of Dwellings

2020 ◽  
Vol 12 (16) ◽  
pp. 6453 ◽  
Author(s):  
Catarina Ribeiro ◽  
Nuno M. M. Ramos ◽  
Inês Flores-Colen
Keyword(s):  
Environmental Quality ◽  
Indoor Air ◽  
Positive Impact ◽  
Climatic Conditions ◽  
Indoor Environmental Quality ◽  
Visual Comfort ◽  
Acoustic Comfort ◽  
The Impact ◽  
Comprehensive Study

Balconies are an ancient architectural archetype that are being increasingly considered in multi-family buildings of high-density cities. This paper aims to provide a comprehensive review of the impacts of balcony types on the indoor environmental quality (IEQ) and energy consumption of dwellings. Of the reviewed studies, 69% were published during the last decade, making it evident that awareness of the positive impact of balcony spaces is continuously increasing. The literature review allowed us to identify three balcony spaces according to their morphology and their boundary system: open balcony (OB), glazed balcony (GB), and eliminate balcony (EB). It was concluded that these balcony types produce relevant impacts in four factors that contribute to the indoor environmental quality: thermal comfort, indoor air quality, visual comfort, and acoustic comfort. Practical design recommendations and constraints were provided according to distinct climatic conditions and building technologies. This review also explored the assessment methodologies used for the optimization of the balconies on the design process. The literature highlighted the lack of a comprehensive study about the impact of balconies in mild and Mediterranean climates, as well as the knowledge limitations concerning the balance between the impacts on IEQ factors.

The impact of retailers' indoor environmental quality on consumer purchase decision

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Van Thac Dang ◽  
Ninh Nguyen ◽  
Jianming Wang
Keyword(s):  
Environmental Quality ◽  
Purchase Intention ◽  
Positive Impact ◽  
Equation Modeling ◽  
Indoor Environmental Quality ◽  
Content Type ◽  
Consumer Purchase Intention ◽  
Hedonic Experience ◽  
The Impact ◽  
The Relationship

PurposeA review of 67 articles in the indoor environmental quality (IEQ) literature published from 2010 to 2020 reveals that none of prior studies have determined the IEQ of physical retailers and its impact on consumers. To fill such a gap, this study investigates the influence of physical retailers' IEQ on consumer purchase intention. The mediating roles of hedonic experience and perceived brand value (PBV) in this relationship are also determined. Furthermore, the moderating effect of perceived service quality (PSQ) on the link between physical retailers' IEQ and PBV is clarified in this study.Design/methodology/approachThis study uses structural equation modeling (SEM) to analyze a sample data of 996 consumers in China.FindingsResults show that physical retailers' IEQ has a positive impact on consumer purchase intention. Hedonic experience mediates the link between IEQ and purchase intention. PBV also mediates the relationship between IEQ and purchase intention and that between hedonic experience and purchase intention. In addition, PSQ moderates the relationship between IEQ and PBV.Originality/valueTo the best of the authors’ knowledge, this study is the first to determine the impact of IEQ on consumers in the physical retailer context. Specifically, this study enriches our knowledge about the relationship between physical retailers' IEQ and consumer purchase intention with the mediating and moderating mechanisms of hedonic experience, PBV and PSQ. The findings fill the research gaps in the IEQ literature that has ignored the impact of IEQ on consumers' perception and behavioral intention in the physical retailer context. Furthermore, this research provides evidence for retailer managers to understand and improve physical stores' IEQ.

130. Indoor Environmental Quality in Six Commercial Office Buildings in the Midwest United States

1999 ◽  
Author(s):  
S. Reynolds ◽  
P. Subramanian ◽  
G. Breuer ◽  
M. Stein ◽  
D. Black ◽  
...  
Keyword(s):  
United States ◽  
Environmental Quality ◽  
Office Buildings ◽  
Indoor Environmental Quality ◽  
Midwest United States

A dynamic vertical shading optimisation to improve view, visual comfort and operational energy

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Mahdi Valitabar ◽  
Mohammadjavad Mahdavinejad ◽  
Henry Skates ◽  
Peiman Pilechiha
Keyword(s):  
High Performance ◽  
Parametric Design ◽  
Design Method ◽  
Building Energy ◽  
Natural Light ◽  
Visual Comfort ◽  
Content Type ◽  
Operational Energy ◽  
Discomfort Glare ◽  
The Impact

PurposeThe aim of this paper is to present a parametric design method to generate optimum adaptive facades regarding occupants' comfort and building energy criteria. According to the literature review, the following questions have arisen to address the research gaps: Is it possible to have the outside view throughout the whole year without discomfort glare by utilising adaptive solar facades (ASFs)? How can architects integrate both view quality and quantity into ASF design? What is the impact of dynamic vertical shading systems mounted on south facades on the outside view, occupants' visual comfort and operational energy? How can we evaluate the view quantity through multi-layer shading systems?Design/methodology/approachIn recent years, there is a surge in demand for fully glazed buildings, motivating both architects and scholars to explore novel ideas for designing adaptive solar facades. Nevertheless, the view performance of such systems has not been fully explored especially when it comes to the effect of dynamic vertical shading systems mounted on south facades. This fact clarifies the need to conduct more research in this field by taking into account the window view and natural light. Consequently, a simulation research is carried out to investigate the impact of a dynamic shading system with three vertical slats used on the south facade of a single office room located in Tehran, on both view quality and quantity, visual comfort and operational energy. The research attempts to reach a balance between the occupant's requirements and building energy criteria through a multi-objective optimisation. The distinctive feature of the proposed method is generating some optimum shading which could only cover the essential parts of the window area. It was detected from the simulation results that the usage of a dynamic vertical shading system with multi slats for south facades compared to common Venetian blinds can firstly, provide four times more view quantity. Secondly, the view quality is significantly improved through enabling occupants to enjoy the sky layer the entire year. Finally, twice more operational energy can be saved while more natural light can enter the indoor environment without glare. The final outcome of this research contributes toward designing high-performance adaptive solar facades.FindingsThis paper proposes a new metric to evaluate the view quantity through a multi-layer shading system. The proposed method makes it clear that the usage of dynamic vertical shading systems with multi-layers mounted on south facades can bring many benefits to both occupants and building energy criteria. The proposed method could (1) provide four times more view quantity; (2) improve view quality by enabling occupants to watch the sky layer throughout the whole year; (3) slash the operational energy by twice; (4) keep the daylight glare probability (DGP) value in the imperceptible range.Research limitations/implicationsThe research limitations that should be acknowledged are ignoring the impact of the adjacent building on sunlight reflection, which could cause discomfort glare issues. Another point regarding the limitations of the proposed optimisation method is the impact of vertical shading systems on users' visual interests. A field study ought to be conducted to determine which one could provide the more desirable outside view: a vertical or horizontal the view. Research on the view performance of ASFs, especially their impact on the quality of view, is sorely lacking.Originality/valueThis paper (1) analyses the performance of dynamic vertical shadings on south facades; (2) evaluates outside view through multi-layer shading systems; and (3) integrates both view quality and quantity into designing adaptive solar facades.

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