The bedroom is not an healthy place. Low air change rates are quite common. This paper describes the microclimate in a bedroom, focusing on the moisture balance, air flow patterns and house dust mite allergen. Home inspection and interviews resulted in a database . Experiments and results are presented.

Most epidemiological studies rely on outdoor concentrations for the estimation of exposures. This paper aims at identifying predictors of particulate matter infiltration using public databases and questionnaire data in the context of a prospective birth cohort study to assess the contributions of environmental, social and genetic factors for asthma etiology.The method, and results are presented.

The flow of air through the porous media that is used as building insulation has the potential to recover energy normally lost through the building envelope via conduction. In essence, the walls of a building can be used as a crude heat exchanger, the effectiveness of which depends on the flow

The use of an underfloor plenum to deliver conditioned air directly into the occupied zone of a building is one of the key features that distinguish underfloor air distribution systems from conventional ducted overhead systems. This paper describes the development, validation, and application of a computational fluid dynamics (CFD) model for predicting the airflow and thermal performance of underfloor air supply plenums. To provide validation data for comparison with the

Experiments with room air distribution that is generated by a radial ceiling-mounted diffuser and a diffuser generating flow with swirl are compared with the air distribution obtained by mixing ventilation from a wall-mounted diffuser, vertical ventilation, and displacement ventilation. The air distribution generated by a radial diffuser is partly controlled by the momentum flow from the diffusers and partly from gravity forces where the thermal load and the temperature difference between room air and supply air deflect the radial wall jet down into the occupied zone.

Volatile organic compounds (VOCs) are major gas-phase indoor air pollutants, and filtration is one of the promising methods to control indoor VOC concentration levels. An adsorption technique is commonly used for filtration of VOCs using adsorbents such as activated carbon. Unlike a particlefilter system, the applications of gas-filter systems have not been widely studied, and standards for the evaluation of gasfilter systems do not exist. As groundwork for standards development, this study proposes an experimental method that can evaluate the performance of gas filters in removing VOCs.

Because of their ability to improve building air quality and their potential to reduce energy usage in some climates by allowing more conditioned air recirculation, use of gas contaminant filters in buildings is increasingly considered. Air cleaning is an option under ASHRAE Standard 62 and is

This paper provides a method for verifying the accuracy of computer models that simulate the performance of the airhandling components of four types of heating, ventilating, and air-conditioning systems: the dual-fan VAV dual-duct system, the single-zone system, the four-pipe fan coil system, and the four-pipe induction system. To accomplish this, a detailed description of each system and its operating parameters was developed and a set of eight test conditions was generated, consisting of carefully chosen space loads and weather conditions.

A new all-electric retail store located in Montreal, Canada, incorporates several design features to maximize the interactions between various building components. The twostory, high-performance, "green" commercial building is the result of an integrated energy design process and features

Two high-performance prototype houses were built in Carbondale, Colorado, as part of the US Department of Energy’s Building America (BA) Program. Each prototype was a 1256 ft2 (117 m2), one-story, three-bedroom house and met the local requirements for aff