English

A study of the reliability of systems by considering the ability of different systems to maintain a required air flow rate over time is included in a subtask of IEA Annex 27 'Evaluation and Demonstration of Domestic Ventilation Systems'. Measurements and calculations were performed to determine the variation in ventilation rates due to variation in climate and variation in performance of the ventilation system. Dwellings with passive stack, mechanical exhaust and mechanical exhaust-supply ventilation, representative of the Swedish housing stock, were studied.

In designing and constructing its new R&D Centre, the Tokyo Electric Power Company (TEPCO) had two main aims: to provide a comfortable working environment and to conserve as much energy as possible. To achieve these aims, attention focused on the control of heating and lighting, especially in perimeter zones near glazed areas. The major features included ventilation windows with integral automatically controlled blinds, and daylight compensation lighting controls. Together, these have significantly reduced heating and lighting loads

Comprehensive air velocity measurements were carried out above a thermal manikin to find the velocity distribution in the plume above the head. The thermal manikin was either standing or sitting in a climate room (6 x 8 x 4.6 m) in quiet, isothermal surroundings. The air velocities in the plume were measured at different heights above the top of the head. The manikin's heat effect was varied within a wide range. The measurements were made with both a breathing and a non-breathing manikin.

Awareness of the need for energy efficient houses has never been so high, but are low energy dwellings delivering the performance they promised, or are comfort levels rising?

For more than 1 year, indoor and outdoor O3, NO, N02 (NOx - NO), temperature, and relative humidity as well as the air exchange rate have been measured continuously at a commercial building in Burbank, CA. The indoor concentration of a given pollutant is a function of its outdoor level, the air exchange rate, the rate at which it is removed by indoor surfaces, and the rate at which it is produced or removed by indoor chemistry. Several examples of indoor chemistry are inferred from daily and seasonal variations in the collected data.