radon

Two detached houses situated on a hill, a slab-on-grade and a basement building, were used to assess factors that affect the rate of radon entry. For the former, the rate reached its maximum during a particular weather condition when the internal transport of radon was induced by the wind. The latter's rate was highest when the wind blew towards the hill. Changes in barometric pressure did not influence either. Rain affected the rate for the latter house. For the former house the adjusted rate of radon entry showed it to be higher in the morning.

Results from pre- and postconstruction radon measurements in a new housing development are presented. The houses were built in an area that had not been previously associated with elevated indoor radon concentrations. Exhalation measurements of gravel and stone from the site and soil gas measurements under several houses did not indicate an elevated radon potential. However, 4 of 21 finished houses (or 19%) exhibited annual average indoor radon concentrations over 200 Bq.m-3 (5.4 pCi/l).

Arbitrary energy conservation tactics have caused numerous environmental problems in all types of buildings. HVAC testing and adjusting can help solve them

Numerous scientific studies show that indoors are the source of potentially harmful substances called indoor air pollutants. They come from various sources. Indoor levels are often much higher than outdoor level and most people spend the bulk of their time indoors. As indoor air pollution is relatively new problem, health and comfort problems are associated with it. The starting point for studies on constituents of the indoor environment is to realize that the problem to be solved is complex.