Numerical simulations were executed to estimate air movement in a typical room.The analytical estimation of minimum value of inlet air velocity from UFAD system has been confirmed by those simulation results of temperature and velocity distributions..

Two government facility ventilation systems were evaluated in that study, one with a recirculation system, and the other one that used 100% outside air with no recirculation. For the two systems different filters have been tested : low-efficiency bag filters and medium-efficiency filters for the first one and electrostatic bag filters and V bank filters for the second one. The results of a 3 year evaluation are presented.

For that paper, the three-dimensional flow patterns and the real-time tracer gas leakage were studied to understand the physical mechanisms of the contaminant dispersion and containment leakage during the ventilation process through a laboratory fume hood. In that aim the laser-assisted flow visualization method and the standard/special gas sampling technique were used.

In this paper , eight simple steps for designing a DOAS with CRCP system are provided . They consist in the determination of design outdoor air conditions, target space conditions, design cooling load and required ventilation rate for each space, supply air conditions, enthalpy wheel effectiveness and design cooling coil load, sensible cooling load for the CRCP system, design panel cooling capacity. The following of those steps should be very useful for engineers considering a DOAS/CRCP system.

The objective of that experimental field study was to investigate if a better indoor air quality in classrooms improves the performance of schoolwork for children. The results demonstrate that thanks to an increase of the outdoor air supply rate, or a moderate reduction of elevated classroom temperatures, the performance of a wide range of schooltasks are improved.

HVAC engineers have to incorporate the calculations and directives of the Ashrae standard 62.1-2004 into the normal design process to improve ventilation air delivery. Calculation of the ventilation rate procedure are difficult but several tools exist to make it easier.

The objective of this paper was to develop a flexible mathematical model that could help to determine the best strategies for containing indoor airborne infections at the early stage of outbreak.The impact of engineering control measures combined with public health interventions was examined mathematicallyl.

This paper focuses on the possible association between classroom ventilation rates and the students' academic performance. A pilot study was conducted. The total number of observations with complete data included fifth grade classrooms in 54 elementary schools. The results of this preliminary study are presented.

That study demonstrated that factors in school environment such as high temperature, low air exchange rate and ambient air pollution from traffic exhausts are responsible for respiratory symptoms among pupils. Some solutions are suggested to improve that situation.

In this paper, the authors have investigated the determinants of IAP in Bangladesh, using monitoring data from 236 households in the region of Dhaka. Their results show that fuel choice affects indoor pollution levels significantly. A national "clean household" promotion program combined with an effective public education on the associated health benefits would reduce IAP exposure to safer levels for the very poor families.