To ensure that indoor air quality mitigation approaches, such as ventilation, are providing the desired indoor air quality, it is necessary to better understand the varied sources of indoor air contaminants and how different mitigation approaches will affect those sources. This article describes a generalized model that describes the efficacy of different indoor air quality improvement strategi...

The LAHU system has been designed, installed, and commissioned in a large university research building. This paper provides detailed information about the demonstration project, including the specific LAHU system mechanical design, optimal airflow control schedules, and measured LAHU energy and indoor air quality (IAQ) performance. The measured energy and IAQ performance are also compared with ...

Saving energy and improving Indoor Air Quality (IAQ) and thermal comfort in buildings are traditionally competing goals. Facilities that manage one of these objectives well tend to compromise the other. Building Automation Systems (BAS) have been limited in their ability to sense these characteristics of a building and therefore cannot act on them. A majority of buildings define IAQ in terms of...

The aim of the present work is to maximize indoor environmental quality (IEQ), in particular air quality, and energy performance in schools, when having different ventilation alternatives combined with carbon dioxide feedback. In this effort, trial measurements and energy simulations were conducted to predict and compare the indoor environmental and energy performance in an otherwise similar sc...

indoor environment. The most important include indoor pollutants, outdoor pollutants near the building, pollution transport through the ventilation system, air cleaning or filtration, and indoor climate (temperature and relative humidity). Many building materials, the furnishings and equipment, and the occupants and their activities are sources of indoor pollution. Following is a list of some o...

UNLABELLED Residential air exchange rates (AERs) are vital in understanding the temporal and spatial drivers of indoor air quality (IAQ). Several methods to quantify AERs have been used in IAQ research, often with the assumption that the home is a single, well-mixed air zone. Since 2005, Health Canada has conducted IAQ studies across Canada in which AERs were measured using the perfluorocarbon ...

Energy Efficiency and Indoor Air Quality in the healthcare applications and particularly in surgical operating theatres are important features in modernized designs. The various reasons for deviation from obtaining optimum IAQ and energy efficient buildings are listed. The air conditioning systems serving the operating rooms require careful design to minimize the concentration of airborne organ...

Introduction Studies of school environment and related health diseases in pediatric population have been performed recently. The European Commission, through the Directorate General for Health and Consumer Affairs, funded the study on Health Effects of School Environment held in different European countries. Levels of air pollutants can be several folds higher exposures are prolonged. Since chi...

Indoor Air Quality (IAQ), particularly in educational facilities, is gainingconsiderable interest and a synonymous indicator towards evaluatinghuman comfort. Factors such as CO2 concentration, temperature, andhumidity play crucial parts determining an acceptable level of IAQ.Many studies have also demonstrated that the indoor air quality ofclassrooms affects students’ concentration performance....