Presents the major findings from two studies of moisture problems in crawl spaces. Three mechanisms play a role: transport by air via the floor, moisture migration through the floor and cold bridges. Special attention was paid tomoisture transport by air as it is an important cause of moisture problems. Some conclusions are drawn.
Summarises the issues discussed at the Indoor Air '84 conference in Stockholm. The main topics include sick buildings, organic compounds, formaldehyde, combustion products, and radon.
The text of a paper on ventilation equipment and systems for existing air-tight houses, presented at the Bouwcentrum/Vakinfo one-day conference, Rotterdam, November 1, 1984. Treats the application of 1. natural ventilation systems with vertical ducts and adjustable openings, 2. the same with mechanical exhaust via kitchen, bathroom, and toilet, 3. mechanical supply to all rooms and exhaust via kitchen, bathroom, and toilet, 4. balanced supply and exhaust. Treats the possibility of the private buyer or tenant estimating the quality of the house.
Reports a case study dealing with the relation between ventilating and airing behaviour and the outside climate. Also the significance of other variables such as preferences with respect to the indoor climate are considered. Wind speed is found to correlate, but outside temperature (varying from -3 to +9 degrees C) does not correlate with the length of time the windows in the bedrooms and bathrooms are opened. Rainfall and sunshine also seem to have some influence. The main reasons for airing are that the bedrooms are too warm and not fresh.
Distinguishes two categories of leaks in buildings for cold storage. Thermal leaks through parts of the construction with poor thermal insulation and air leaks through openings in the walls allowing a more or less free flow of air. Outlines principles of infrared radiation and thermography. Discusses applications for both types of leaks. Under the conditions of high emissivity of the surface to be studied, and absence of local heating or cooling (sun,wind, rain), thermography is an effective method for the detection of thermalleaks and a powerful tool for localizing air leaks.
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