In 2002, the European Commission (EU) issued a Directive aiming to reduce the energy consumption of buildings, which was adopted by the EU member states and came into force in 2006. Portugal adopted it by issuing law decrees in 2006 which considered not only the energy saving aspects but also additional specific measures aiming to protect indoor air quality (IAQ). This new legislation is now be...

Mechanical ventilation systems for controlling conditions in individual zones can move a constant or variable supply of conditioned air to handle all or some of the heating and cooling loads. They are classified as all-air, air-water, and all-water systems. All-air systems include single-duct, dual-duct and multizone. The systems can be designed to operate at Constant Air Volume (CAV) or Variab...

Alaska Native children experience high rates of lower respiratory tract infections (LRTIs) and lung conditions, which are associated with substandard indoor air quality (IAQ). We conducted an intervention of home remediation and education to assess the impact on IAQ, respiratory symptoms and LRTI visits. We enrolled households of children 1-12 years of age with lung conditions. Home remediation...

Air pollution is a major risk factor, and it still remains global cause of death for millions people. Indoor air quality (IAQ) plays an important role in human health as people spend most their time confined spaces. Many studies have recently addressed this issue, but no systematic analysis has been conducted, which the aim our study. We present bibliographic articles on IAQ industrial environm...

Understanding the behavior of airflow in a room is essential for building designers to provide the most efficient design of ventilation system, and having acceptable indoor air quality. This trend is the motive to solve the relationship between airflow parameters and thermal comfort. This paper investigates airflow characteristics, indoor air quality (IAQ), and the thermal comfort (TC) in a ven...

Abstract The world’s leading indoor air quality guidelines provide for the identification of certain parameters with a specific limit value based on latest empirical measurements, however, most them do not have legal coverage and are voluntary. This leads to unequal assessment quality, because there is an identifiable difference between values set out in various guidelines. And these would be r...

Buildings represent a major part of the world energy requirement. The simulation of combined heat, air and moisture (HAM) and pollutant transfer in this context is important to predict the indoor air quality (IAQ), along with the thermal comfort inside the buildings. Moreover, it is important to have appropriate levels of indoor humidity along with the room temperature as movement of water vapo...

The number of cases of asthma in school-aged children has increased dramatically over the past 30 years. Nearly one in 13 school-aged children suffers from asthma, the leading cause of school absenteeism accounting for over 10 million missed school days each year. Asthma is a chronic obstructive lung disease caused by inflammation and increased reaction of the airways to various triggers. Sympt...

air conditioning is widely applied for the improvement of standard of living in human life. this present investigation focused on the prediction of indoor air quality characteristics of air conditioned car using fuzzy logic algorithm. the conditioned space was selected and the experiments were planned as per design of experiments to study the effect of human load, fresh air supply and air veloc...

Carbon dioxide concentration, temperature and relative humidity in an indoor environment are some of the main indicators air quality (IAQ). In addition, these parameters directly related to airborne transmission diseases. this context, ventilation regulation is essential balance safety via renewal, with comfort energy efficiency. research, educational space Faculty Engineering considered as a c...