Dust removal in living rooms. Zur Entstaubung der Luft in Wohnraumen.

Notes reasons for reducing dust concentrations in rooms - allergic reaction to pollens and mould spores, etc., plus the fact that viruses and bacteria and some substances causing smells are often attached to dust particles. 

Indoor air, volume 6: evaluations and conclusions for health sciences and technology.

Contains further papers, reports and conference summaries from the 3rd International Conference on Indoor Air Quality and Climate, 1984, as well as afull list of authors and titles of papers printed in this and the previous volumes.

Requirement-controlled ventilation of an auditorium.

Describe tests carried out in an 850-seat auditorium of 4000 m3 to compare the readings of a CO2 indicator for controlling the ventilation air flow with the readings from a Stafa odour indicator. Supplies the results in diagrams and tables and discusses them. Notes the odour indication agrees well with the CO2 indication until a certain point when the CO2 concentration is decreasing. Notes this need not be a drawback.

The influence of human activity on ventilation requirements for the control of body odor.

Body odour emitted by 16 occupants at three activity levels (1, 4 and 6 met) was evaluated by 30 male and female judges. The judges assessed, when entering the occupied room, the intensity and acceptability of the body odour. CO2 concentration and air change rate were measured. For the same CO2 concentration, the body odour intensity was of the same magnitude whether the occupants were sedentary or engaged in physical activity up to 6 met. But odour caused by physical activity was less acceptable than odour from sedentary occupants.

Ventilation and body odor.

A total of 200 experiments on evaluation of body odour were performed in two identical auditoria at the Technical University of Denmark at ventilation rates of 0.4-26 l/s/person, with an air space per occupant of 4-21 m3 and with air temperatures of 17-26 deg C. Ten minutes before the end of each 35 minute lecture period 10 judges entered the space and were questioned concerning their acceptance of body odour. They were also asked to evaluate the odour intensity on a fixed scale.

Ventilation Requirements

The work to be described here is an elaboration of Lehmberg's preliminary experiments. The object was to study the general problem of ventilation odours under normal conditions, comparable to those in schoolrooms, offices, homes and the like with the possibility of establishing ventilation requirements for various groups of individuals, including grade school children and adults, under representative winter and summer conditions. Three methods of odor control were studied dealing with personal sanitation, ventilation, and air washing.

Ventilation requirements in occupied spaces during smoking and nonsmoking occupancy.

This investigation looks at sensory (odour, irritation) and physical criteria for ventilation requirements, paying particular attention to the difference between smoking and nonsmoking occupancy in a well-controlled environmental chamber. 

The influence of air temperature on the perception of body odour.

Ambient temperature may influence both the emission and the perception of human odour. This paper studies how human odour is perceived at different temperatures. 

Ventilation, the balance between energy and well-being.

A survey is given of the sitution in The Netherlands with regard to ventilation and infiltration. Starting from a point of generally very leaky and hardly insulated buildings now the necessity is felt on the one side to make standards for the airtightness to prevent energy wastes by too high infiltration rates and on the other hand to define minimum ventilation rates to secure safe and hygienic conditions in well insulated and airtight buildings. This minimum ventilation rate is based on contaminants, caused by the occupants themselves, the so-called unavoidable sources.

Indoor climate in 6 low energy houses. Indeklimamalinger i seks lavenergihuse.

Over a one-year period, measurements were taken of air temperature, air humidity, ventilation rate, concentration of organic gases and vapours, formaldehyde and odour intensity in a small unfurnished bedroom in each of 6 new unoccupied low energy houses. The indoor climate was on average characterized by an air temperature of 24.7 plus or minus 3 degrees C, and an air humidity of 5.9 plus or minus 2.0 g/kg. Ventilation in each room was between 0.79 and 2.92 air changes per hour. On average 14 different compounds were identified in the samples, a total of 23 compounds being identified.

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