Random samples of the workforces of an air conditioned and naturally ventilated building were interviewed using a doctor administered questionnaire. Large and statistically significant excesses of work-related nasal symptoms, irritation of the eyes, dry throat, headache, dry skin andlethargy were detected in the air conditioned building compared to the naturally ventilated building. In the air conditioned building, over 36% of those interviewed were suffering from a single symptom and few workers were symptom free.
The employees in a large office in Trondheim were complaining about headache, tiredness, sickness, allergic reactions in eye and nose, dry skin, respiratory diseases etc., and as usual they believed that their inconvenience was due tothe ventilating system. However, preliminary investigations did not verify this assumption, although it was evident that the heating and ventilating system was part of the problems. Measures included reduction of room temperature, antistatic treatment of carpets, and replacement of noisy ceiling diffusers.
The National Institute for Occupational Safety and Health (NIOSH) and the U.S. Army, Construction Engineering Research Laboratory (USA-CERL) have collaborated on a project that examines the influence of heating, ventilation, and air-conditioning (HVAC) system operational parameters on the levels of microorganisms found in a simulated office space. In these experiments, fungi were collected as representative microorganisms using side-by-side sieve and slit samplers. Experiments at USA-CERL demonstrated that fan coil units are a major source of fungal aerosols in the built environment.
A matched pair of identical mobile homes, one supplied with electric heating and cooking utilities and the other with propane gas utilities, were used to evaluate, over a 14-month period, various factors which may affect indoor formaldehyde c
A mobile laboratory has been constructed for the sensory analysis of air quality in the field. It is used as a human exposure chamber for prolonged exposure to low concentration pollutants, a generator chamber for air pollutants, and a pollut
During the past few years it has become apparent that office environment problems have reached epidemic proportions. The Department of Environmental Health, School of Public Health and Community Medicine in 1963 was empowered by the State Legisl
Formaldehyde concentrations and ventilation rates in Finnish housing were measured. Results are discussed with reference to the recommended minimum ventilation rate of 0.5 ach.
Results are given of the effect of ventilation rate, duct length and particle concentration on ion concentration under laboratory conditions. The effect of electrostatic fields is discussed.
Treats the causes of deterioration in buildings, thermal bridges, the indoor climate, data for the design and execution of buildings and living conditions in rooms. Section headings are The formation of moulds, Humidity in buildings, The temperature factor, tau, as a criterion of the thermal quality of thestructural elements, Conditions of occupation of buildings, Thermal bridges, Natural ventilation of buildings, Conclusions, Advice.
Describes measurements made in a real factory building and comparisons with the scale model tests presented in the previous report. The ventilation system of the factory building is a mechanical one with the necessary rate of ventilation designed to be less than that calculated by the conventional method. The parameters studied included air velocities measured with hotwire anemometers at the inlet openings and the temperatures in the work hall itself measured from a crane.
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