The aim of this study was the experimental determination of particle deposition for both different particle size fractions and different indoor surface materials. The selected surface materials were glass, gypsum plate, carpet, and curtain. These materials were tested vertically in a full-scale test chamber. Experiments took place in a 32 m3 chamber with walls and ceiling made of glass. Prior to each experiment the chamber was flushed with outdoor air to reach an initial particle concentration typical of indoor air in buildings with natural ventilation.

When room ventilation is based on the stratification or zoning strategy, the ventilation airflow rate is determined on the grounds of the convection flows of the heat sources. Thus, inthe design phase of office ventilation, the convection flows of common office devices shouldbe known. Especially, to correctly dimension the ventilation air flow, it is important to knowthe volume flow rates. However, even if the convective power of an office appliance isknown, the cooling fan makes the prediction of the characteristics of the convection flow verydifficult.

In this study, energy consumptions associated with the change in outdoor air flow rate areanalyzed based on numerical methods. By employing the concept of ventilation effectiveness,possible reductions in the outdoor air load through reductions in the amount of outdoor airflow rate has been estimated. In addition, the effects of optimizing the capacity of HVACequipment on annual energy consumption and annual CO2 emissions have been analyzed.

The purpose of this paper is to assess the health and wellbeing implications of working in adeep plan office building in a temperate climate and illustrate how office design can add to ordetract from productivity.The authors have carried out post occupancy evaluation surveys on employees before andafter the move from a naturally ventilated, shallow plan office to a deep plan, air-conditionedoffice. The workforce and workload remained constant, which enabled true comparisonbetween building types.

Environmental temperature in which perform commercial hybrids on privately-owned family farms in the Banat area (România) has a strong impact on the valorisation of feed and particularly on energy, as there is an optimal temperature at which feed is valor

This paper presents an evidential review of current knowledge on the issue of walking versus sedentary behaviour in office environments. It considers the medical evidence in relation to cardio-vascular activity and the long-term effect of sedentary compared to mobile work routines. The paper then goes on to consider the concept of embedded health within buildings, reflected in the way that buildings are designed and managed. It highlights in particular the role of the facilities manager in enabling such embedded health.

A subjective experiment was conducted in a climatic chamber to evaluate the effects of improvement of indoor environmental quality on occupant’s performance. The chamber was conditioned with the combination of: operative temperatures of 25°C or 28°C, illu

Field studies have shown that speech is the most distracting sound in open-plan offices. On the other hand, laboratory studies have shown that speech impairs the performance of cognitively demanding work tasks, e.g. reading and memory-recall tasks. The sound level of speech does not determine the degree of distraction caused by speech. Instead, Speech Transmission Index, STI, which correlates with speech intelligibility can explain the distracting power of speech much better. STI can be determined also between workstations in open offices.

A computer program for both field survey and laboratory experiment was developed toevaluate performance of office works and to link the findings from experiments to the actualoffices. The program has three parts: namely, Voting Tool, Task Tool, and PerformanceEvaluation Tool. In this study, the Performance Evaluation Tool, which is consisted of twelvestandard tests, was examined. The abilities required for the office works in two companiesand one branch of the government office were collected to verify the applicability of thePerformance Evaluation Tool.

A long-term field study was conducted in an office for seven months to clarify the effect of thermal environment on productivity. Seven male software programmers participated as subjects. They answered the questionnaires on their personal computer including thermal sensation votes, complaints about their working environment, fatigue, vitality, mental workload and self estimated productivity every workday. The numbers of keystrokes were automatically recorded during the operation of their computers. Advanced Trail Marking Test (ATMT) was also conducted as the estimation of performance.