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Standard 62.2 approved-ASHRAE publishing residential IAQ standard

Standard 62.2. is the first and only recognized Indoor Air Quality standard for residential buildings in United States. It provides a variety of ways to improve at minimal cost the indoor air quality. This standard became official on October 2003. It may be applied to both new and existing houses.

Natural ventilation in dense residential areas: studying alternatives

The provision of adequate naturally generated airflow is a vital component of energy-efficienthealthy buildings. Increasing densification in cities of today acts as a dominant influence onthe wind regime, diverting and obstructing natural wind flow to unpredictable levels.Localized air movement is often inadequate and vastly different from regional magnitudes anddirections and cannot be used as the basis of design.

The French National Survey on Indoor Air Quality: sample survey design

A nationwide survey on indoor air quality will be set up in France in 2003-2004. The aim ofthe survey is to assess household exposure to indoor air pollutants. The target population isthe national housing stock of approximately 24 million permanently occupied housing units.A nationally representative sample of dwellings will be selected based on a three-stagesampling design. At the first stage, the Primary Sampling Units (PSUs) are categorized basedon French territorial divisions. The second stage of the design is the sampling of segmentswithin the PSUs.

Measured IAQ in two new blocks of flats

Two similar blocks of flats have been built for people with respiratory diseases. The buildingshave a clean and effective ventilation system and low emitting building materials. Theventilation system is a centralized supply and exhaust air system, either based on demand(Building A) or user controlled (Building B). Total volatile organic compound (TVOC) levelsand concentrations of ammonia and formaldehyde were measured in one apartment on each ofthe six floors of both buildings before occupants moved in and after 3 and 7 months and afterone year of occupancy.

Magnitude of the mould and moisture problem in Danish homes

The purpose of this study was to quantify the extent of moisture problems in Danish homes. Aquestionnaire-based survey was made and a representative sample of 3800 Danes older than15 years responded. Main results are that 17.6% of the people have had moisture damages intheir dwelling during the last 5 years and among those as much as 36.4% have not yetremedied the damages. A total of 17.7% have moisture or mould spots on their walls, ceilingsor floors.

Wall relative humidity: a simple and reliable index for predicting Stachybotrys chartarum infestation in dwellings

The aim of that study was to compare measurements of wall relative humidity (RH) to mold identification in 458 samples from 100 dwellings. The mold identification was made by a direct microcospic examination of a sample collected on the wall by means of the gummed paper technique. The conclusion of that study was that a simple measurement of wall RH is a reliable index for suspecting S. Chartarum infestation in a dwelling.

Health in occupants of energy efficient new homes

A pilot questionnaire study was carried out on two groups: 128 occupants of new homes' (52 R-2000) on the one hand and 149 occupants of control homes on the other hand: both the groups were questionned to compare their general and respiratory health at occupancy and one year later. Symptom scores improved significantly over the year of occupancy for the occupants of energy efficient homes.

Occurrence of phthalates and musk fragrances in indoor air and dust from apartments and kindergartens in Berlin (Germany)

The purpose of that study was to measure exposure levels of phthalates and musk fragrances in typical apartments, kindergartens and to estimate their effects on health. 59 apartments and 74 kindergarten in Berlin were studied.

Duct cleaning: Do homes need it ?

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.

Indoor air quality in residential buildings: costs, effects and benefits of mechanical ventilation systems

The presence of high levels of urban pollution imposes at the international level the need tothink again about the type of ventilation systems in residential buildings. This has to be donein order to provide a better IAQ level. Natural ventilation cannot guarantee either the correctchange of air inside the buildings or a good IAQ level, as there is no possibility of checkingthe supply and extraction airflow rates in any thermo-hygrometric condition.