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indoor climate

Thermal comfort in the climatic conditions of southern Italy

This paper presents the results of four thermal comfort surveys conducted in naturally ventilated and air-conditioned buildings located in Bari, in southern Italy, during winter and summer seasons. The buildings were of different types, including offices, lecture rooms, and library reading rooms. The

Do people like to feel "neutral" ? Response to the ASHRAE scale of subjective warmth in relation to thermal preference, indoor and outdoor temperature

This analysis explores a discrepancy between neutral on the ASHRAE scale and prefer no change on a thermal preference scale. The data employed are from numerous field studies drawn from two large databases. Multivariate analysis showed that the ASHRAE scale vote depended not only on the recognized thermal variables but also on the outdoor temperature, while the thermal preference vote was relatively little influenced by outdoor temperature.

Criteria for design of indoor environment in sustainable buildings

There is a worldwide trend to develop a tool that can provide comprehensive assessment ofbuildings for sustainability. Many efforts were found to propose approaches for energy-savingand resource-recycling, and on the other hand buildings for sustainability should maintain theacceptable indoor environment quality to maintain the occupants health. This paper presentsa comprehensive index, IEI(AHP), composed of the filtered physical indicators, for quantitativeassessment on the built environment.

Multicriteria analysis method of health, IEQ and energy use for sustainable buildings

The stake of sustainable development is to ensure today's and future developments of awealthy and healthy society in a high quality environment. This is also valid for sustainablebuildings that should take account of environmental, economical and social stakes. Thisincludes, among others, low energy use, good indoor environment quality (IEQ) and health.One of the aims of the European HOPE project is to evaluate buildings from these points ofview.

Performance-based building: a state-of-the-art with respect to healthy buildings

Within the European funded project PeBBu (Performance-Based Building), a state-of-the-artreport on the performance-based building (PBB) approach with focus on healthy buildings isprepared. It deals with methods, guidelines, protocols and tools to design, evaluate andmeasure the health status of buildings or designs for buildings. The health of buildings in thiscontext relates to air quality, ventilation, thermal comfort, noise and visual comfort.After an introduction into PBB, this paper summarizes the state-of-the-art with respect toperformance and healthy buildings.

A conceptual model to estimate cost effectiveness of the indoor environment improvements

Macroeconomic analyses indicate a high cost to society of a deteriorated indoor climate. Thefew example calculations performed to date indicate that measures taken to improve IEQ arehighly cost-effective when health and productivity benefits are considered. We believe thatcost-benefit analyses of building designs and operations should routinely incorporate healthand productivity impacts.

Comparison of productivity and absenteeism effects of indoor environmental quality in offices

This paper is an overview of literature that investigates the effects of general environmentalquality, indoor air pollution, ventilation rates, thermal comfort, temperature control andnumber of persons per workspace on productivity and sickness absenteeism in offices. Thereview includes both self-reported effects and objective measurements of productivity andabsenteeism and both laboratory studies and field investigations. It turns out that a goodgeneral environmental quality increases productivity by 10-15% and decreases sicknessabsenteeism by 2.5 percentpoint.

Effect of temperature on perceived work environment, symptoms and selfestimated productivity in office work

The aim of the study was to investigate the effects of elevated summer indoor temperatures onperceived comfort, symptoms and subjectively assessed productivity in an office building.The measurements during spring 2002 showed that indoor environment was at the normalFinnish office building level. The mean room temperature during the 2-week measurementperiod was 22C. An indoor air questionnaire (MM-40-FIN) including additional questionsabout work efficiency was presented to the employees during the measurements. Theperceived indoor environment was at the normal Finnish office level.

Environmental quality and the productive workplace

A good working environment will help to provide the user with a good sense of well-being,inspiration and comfort. The main advantages of good environments is in terms of reducedupgrading investment, reduced sickness absence, an optimum level of productivity andimproved overall satisfaction. Individuals respond very differently to their environments andresearch suggests a correlation between worker productivity and well-being, environmental,social and organizational factors.

Indoor climate and perceived comfort in offices

A method has been developed to investigate the comfort in office buildings. It is based onboth measurements and a questionnaire. The measurement apparatus, the so-calledAmbiometer, can record both the main comfort parameters, such as temperature, humidity,noise, light and odours, and the occupant's perceived comfort. Information regarding theindoor climate and the working environment is noted on the questionnaire.Experiments were conducted on about 50 offices in France.