English

This paper gives a description of the cleaning of metal ducts in small buildings, located in heating climates in the northern US states, with different cleaning techniques, their cost, and advices from different trade associations.

In Germany, the radon concentration of 200 Bq/m3 in accordance with the European recommendation (Kommission der Europäischen Gemeinschaften, 1990) is valid as design level for new buildings. Radon from building material can make a significant contribution

This article aims at providing an overview of recent field experience, as reported in the literature, about underfloor air distribution systems (UFAD) as an alternative to conventional air distribution.

IAQ investigators have a responsibility to give correct advice to the client. In cases with mould growth, the question of people’s health is often involved. Economical aspects can also be considerable due to the high costs of necessary actions during and

In this paper the author develops the key factors that influence the performance of ventilation systems mainly in large office buildings. Information for the efficient operation of these systems is provided.

This article sums up a detailed analysis of variable air volume (VAV) box control. Sizing criteria are provided in order to minimize the life-cycle cost in typical application.

This paper reviews the flow network model based on power balance as applied to wind-induced cross ventilation in a residential building. The characteristics of wind-induced cross-ventilation with open windows in buildings are different from those of air infiltration through cracks in walls. The features of the velocity and pressure distributions are apparently different. In cross-ventilation, it seems that a kind of stream tube is formed through the building.

The indoor temperature can be controlled with different levels of accuracy depending on thebuilding and its HVAC system. The purpose of this study was to evaluate the potentialproductivity benefits of improved temperature control, and to apply the information for cost-benefit analyses of night-time ventilative cooling, which is a very energy efficient method ofreducing indoor daytime temperatures. We analysed the literature relating work performancewith temperature, and found a general decrement in work performance when temperaturesexceeded those associated with thermal neutrality.

The purpose of this study was to evaluate the potential economical benefits of reducedsummer time temperatures in an office building. We selected for the study, a typical officebuilding in downtown Helsinki. We measured the room temperatures during a summerrepresentatively in the office rooms. In many rooms the maximum temperatures were wellabove 30C in summer 2002. We used these measured data and calculated the potentialsavings due to improved thermal environment. A method for calculating the potential savingswas introduced in paper by Seppnen et al. (2003).

Public health services are increasingly confronted with inquiries from the public concerningindoor air pollution. But so far no standardized procedures have been applied by authoritiesand experts in this field.