This paper presents the performance of a displacement ventilation system in a thermalchamber with tropical subjects. The chamber is served by an Air-Conditioning andMechanical Ventilation (ACMV) system in either Mixing or Displacement Ventilation modes.In the experiments, tropical subjects were surveyed with respect to their thermal sensationsunder different room conditions in either displacement ventilation or mixing ventilation.Objective measurements such as room air temperature, air velocity and relative humidity weremeasured at different heights in the chamber.

A spot cooling system using the convective cooling effect of an air stream is known to beeffective by its smothering intensive hot environment, supplying comfort sense and utilizingenergy efficiently. However, its study on the interaction with human body or product itself isuncommon, showing that the spot cooling system intrinsically contains the possibility ofdraught because of its short emitting distance from the object, low air temperature, high airstream velocity and its direct local contact to human body.

A series of thermal comfort field data (about 1800 observations), collected in Bari (Southern Italy), were implemented according to the ASHRAE RP-884 world database format, thus constituting a local database for the Mediterranean area, which, with exception of Greece, is not represented in this world database. The collected data, mostly already published, were reexamined in the light of the latest international literature on the subject.

This paper shall investigate thermal comfort requirements for university students in the hot-humid region of Bahrain and the hot-dry region of Saudi Arabia. An extensive field survey shall be conducted among university students in an attempt to define optimum comfort requirements. The field surveys shall deal with the following aspects:
Recording climatic variables, which influence thermal sensation, these are; ambient temperature, radiant temperature, relative humidity and air velocity.

This paper provides a research about rapid methods and simplified tools to assist the projectactors, such as architects, designers and engineers, involved in the building design, in theearliest conception during the preliminary design. We examine the quality criteria of indoorthermal environment in non-residential existing buildings, with failure in the pre-energyconservation. The main objective is how well to predict a mean thermal comfort sensation forworkers under warm conditions over the tropical climate. The occupants could change theiractivity (metabolic rate) and their clothing.

Thermal comfort in office buildings is usually unsatisfactory when ceiling air distribution isemployed, because it is hard to make adjustments to reach specific occupancy needs. On theother hand, underfloor air distribution allows some flexibility for adjustments. In order toevaluate thermal comfort conditions in office environments with underfloor air supply system,a laboratory facility was built at the Universidade de Sao Paulo, Brazil. In this work,quantitative and qualitative results obtained in such facility are discussed.

Ultra-fine and fine particle formation as a result of chemical reactions between ozone and fourdifferent air fresheners and a typical lemon-scented domestic cleaner was studied in a fullyfurnished, naturally ventilated office. The study showed that under conditions representativeof those occurring in such offices, air fresheners or scented cleaners may react with ozone toform secondary organic aerosols (SOA). The tested air fresheners were relatively smallsources of SOA with detectable increases occurring only in the ultra-fine particle numberconcentration.

Characterization of indoor particle sources from 14 residential houses in Brisbane, Australia,was performed. The approximation of PM2.5 and the submicrometre particle numberconcentrations were measured simultaneously for more than 48 h in the kitchen of all thehouses by using a photometer (DustTrak) and a condensation particle counter (CPC),respectively. From the real time indoor particle concentration data and a diary of indooractivities, the indoor particle sources were identified.

The aim of this work was to assess the influence of the ambient air quality and some indoorsources on the concentration levels of airborne fine particles and volatile organic compoundsin a large school of arts. Measurements were conducted, for both indoor and supply air, ineight office rooms in four floors controlled by four separate air handling units (AHU). Fineparticle measurements by SMPS in the size range 15-700 nm indicate that the placement ofthe HVAC air feed points and different AHUs affect the total particle concentration and sizedistribution in the supply air.

The study has been carried out in two different French buildings. The main objective of the study was to know more about office buildings’ indoor air quality as well as HVAC installation working over a long period (1 year). A lot of data are available but