Standards Development

Scope

This international standard describes the steps of designing the whole-building ventilation system for residential buildings and the points to be taken into account regarding the indoor environment and energy consumption. This standard allows the designer to plan a whole-building ventilator that improves indoor air quality, the auditory environment, and thermal comfort, and that also uses energy in a practical way. They also touch on the performance of the building in order to operate a whole-building ventilator well.

Excluded:

- Criteria for indoor air quality

- Criteria for indoor thermal comfort (covered by ISO/TC 159)

- Criteria for auditory environment (covered by ISO/TC 43)

- Evaluation method of energy performance of heating or cooling equipment

- Evaluation method of energy performance of ventilators (covered by ISO/TC 86)

- Evaluation method of energy performance of heat recovery components (covered by ISO/TC 86)

- Evaluation method of building performance (covered by ISO/TC 163)

- Design steps and evaluation method of localized ventilation equipment

- Ventilation systems using natural driving force in all ventilation airflow path

Purpose

Energy conservation in buildings is a pressing issue today. On the other hand, the demand of the occupants for an indoor comfortable environment becomes higher nowadays. In addition, it has been recognized that ventilation is important to keep good indoor air quality and prevent infection. However, ventilation gets cold/hot outdoor air into the room in the winter/summer season, which increases the heating/cooling demand. Therefore, the designer should consider reconciling a good indoor environment and energy conservation in the process of designing the whole-building ventilation system for residential buildings.

There exist other National and International standards, and technical reports, which specify criteria for indoor air quality, thermal comfort, and auditory environment. And other standards specify the method for evaluating the energy performance of ventilators, heat/energy recovery components, heating and cooling equipment, and buildings. The designers can assess these factors with relevant standards, however, there are risks of omitting one or more factors in designing the ventilation system because the designers consider and organize by themselves the factors relevant to thermal comfort, indoor air quality, auditory environment, and energy performance. Furthermore, the ventilation system's performance varies according to the ways of the design even though the designer chooses the same components.

This document specifies the steps of designing the whole-building ventilation system for residential buildings, and the points to be considered regarding the indoor environment and energy consumption. This document helps the designers consider and organize the factors in designing the whole-house ventilation system, which can attain both a good indoor environment and energy conservation.