In Finland eight office buildings were investigated as a part of European project HOPE..There were four office buildings with mechanical supply and exhaust air ventilation systemfrom 1970 and 80 without cooling system. The four other buildings had cooling systems;one with traditional central air conditioning system with cooled supply air system, the threeothers had chilled ceiling or beams in each office rooms. Altogether 800 office employeesfilled and returned the questionnaire.

A mathematical model was constructed to simulate time dependent particle concentration inindoor air and to evaluate the exposure of occupants. The model consists of three main parts:(1) a system model to describe the ventilation system and building envelope, (2) a multizone room model, and (3) a dose model. Models (1) and (2) are coded with Neutral Model Format and solved in the IDA simulation environment, and Model (3) in LUDEP (LUng Dose Evaluation Program). Particle deposition mechanisms were formulated with well-known equations.

Thirteen parts of human body’s perspiration in hot and humid environment in summer in Chongqing, located in southwest China, has been tested in the laboratory. We found that human forehead thorax back armpit and haunch were sensitive to the perspiration a

By means of a comparative study of thermal confort methods for a Brazilian reality using among many others authors Voght and Miller Chagas, Givoni, Fanger-Ashrae, Mahoney, Humphreys, Olgyay, methods, this undergoing study tries to show their particularities for the altitude tropical climate of for the city of So Paulo Brazil. This work intends to show the applicability of each method and point out the differences of acclimatation factors for local population. This theme is particularly important in a country with big variations os latitude and macroclimates as Brazil.

With the analysis of the U.S. EPA BASE data from 100 U.S. office buildings, the authors made associations between moisture and ventilation system contamination with lower respiratory and mucous membrane symptoms . For that they used multivariate regression models .

This paper deals with estimated ventilation rates and symptoms in office workers. For that base study the authors used the U.S. EPA data from 100 large U.S. office buildings, and assessed relationships in multivariate models between ventilation/person and lower respiratory and mucous membrane symptoms.
Findings suggest that ventilation rates above current guidelines would reduce symptoms in office workers, and that occupant density may play an unrecognized role in ventilation requirements.

This paper sums up a detailed (CFD) study of the flow around a Computer Simulated Person (CSP) in a displacement ventilated room. The requirements of several computational aspects such as convergence criteria and grid resolution needed for accurate CFD simulations of the personal micro-environment are identified.
Two RANS turbulence models predicted different behavior in both flow structures. But without experimental data the results could not be validated.

This paper sums up the current results of the IAQ characteristics in 104 child care centers (CCC) , using 4 different ventilation strategies.The corresponding respiratory health symptoms of attending children with their frequency and prevalence rates are summarized too.Temperature, relative humidity and ventilation rates of naturally ventilated CCCs were consistently higher than that of air-conditioned CCCs.

In the present study, the horizontal pivot window is replaced by horizontal louvers.A numerical method (CFD) was used to simulate ventilation performance of different louvers depths as well as different wind speed. Air flow was considered, turbulent, steady, and the effects of buoyancy were taken into account. Results are presented

This paper describes some of the principles applied in the CEN standard "Criteria for the indoor environment including thermal environment, indoor air quality (ventilation), light and noise'. , and includes examples that are presented in itThe standard covers all building types but the paper focuses on office buildings, it is subject to change in so far as the international review of the draft standard is in process of writing.