The working group WG4 of ISO TC 205 aims to define Indoor Air Quality criteria. The draftstandard contains several methods for determining ventilation rates, based on these criteria.The ventilation rates obtained with some of these methods are compared for several premises:ASHRAE 62-1999, the method of perceived IAQ of CR 1752, and the prescriptive method ofAS 1668.2. To improve the comparison, ventilation rates are also calculated with the prEN13779 method.The studied buildings contains offices, classrooms and a play area.
Within the program "Solar Optimized Buildings" which is funded by the German Ministry of Economy (BMWi), a building for the DB Netz AG has been realized and monitored. The design concept of the building is dominated by architectural solutions for ventilation, cooling and lighting of the office rooms. Due to the change of responsibilities during the design and building process, the targeted primary energy consumption of 100 kWh/m 2 y has been exceeded so far. The reasons lie primarily in the inadequate operation of the technical systems for heating, ventilation and artificial lighting.
Energy Performance (EP) standardisation and regulation is by a growing number of countriesconsidered as an attractive approach for achieving a more energy efficient built environment.Several countries have already enacted such EP based regulation (the Netherlands, France,Germany, ASHRAE approach in North America), or are preparing one (Greece, theFlemish Region).The European Council and Parliament are drafting a directive on the Energy Performance ofbuildings, imposing the institution of such regulation in every member state.This paper will give a general introduction to the issue of energy
Purpose of this study is establishment of energy efficient natural ventilation system for Japanese conventional wooden single-family house, by using humidity-controlled extract units (code name: GHN).To evaluate the effect on energy performance and indoor air quality by adapting the GHN to the passive stack ventilation system, airflow rate, humidity, temperature and CO2 concentration are measured over a period of one year in an experimental house.
Studies on buildings’ airtightness have shown that several issues can arise from uncontrolled airflow leakages in buildings (e.g., higher energy cost, thermal comfort and health of occupants, building components and equipment preservation). Indeed, the ne
A simplified tool, called ConsoClim, has been developed for estimating energy consumption of air conditioned buildings and for comparing HVAC and building solutions. Its main aim is to be used at the early stage of the design process. It means that algorithms have been developed to be used with minimum and quite simple inputs that are available in manufacturers' catalogues or can be fixed at typical default values. The aim is to check that building design options and HVAC system choices lead together to an efficient global energy performance.
In the Mediterranean countries, where the active solutions of air-conditioning must be avoided, natural ventilation allows improvement of indoor comfort which is generally critical in hot season, and reduction of building cooling loads.A three-dimensional zonal model for calculating temperature fields and airflow distributions insideunconditioned buildings was developed.
The aim of the study was to evaluate the technical and financial impact of the ENV 12097 requirements and to compare them with the “state of the art” in France. The comparison has been carried out on the basis of a case study consisting in a three-floor o
The European Community SAVE Directive 76/93, makes mandatory, among other things, for member states to implement an action called Energy Labelling of buildings. This labelling should consist of a description of the energy characteristics and some information about energy efficiency; and is aimed at reducing CO2 emission by means of a parallel reduction in energy consumption. The European Union allows each country to adopt the most suitable methodology according to weather and building industry characteristics and socio-economic context.
In June 2001 ASHRAE's Standard Project Committee on "Ventilation and Acceptable Indoor Air Quality in Low-Rise Residential Buildings", SPC 62.2P, recommended and the Board of Directors approved ASHRAE's second complete standard on residential ventilation for public review; this was followed by public reviews of independent substantive changes in 2002 . The standard is an attempt by the Society to address concerns over indoor air quality in dwellings and to set minimum requirements that would allow for indoor air quality and energy efficiency measures to be evaluated.
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