Abstract
The understanding of ventilation requirements in commercial buildings has been significantly revised in the last 10-15 years. A link between health, productivity and increased fresh air use has been established by some research and this understanding underpins the ventilation philosophy adopted for the CH2 building. The ventilation system design for CH2 that has been evaluated in this paper envisages a mechanically driven system during the day, using the displacement technique to distribute filtered air. All introduced air will be drawn from outside and no recycling of air will occur. Natural ventilation will be employed at night using the stack effect, enhanced by turbine ventilators. This paper critiques the proposed ventilation system in the light of international experience and the particular conditions of the building's location. The evidence suggests that natural ventilation sometimes may be inadequate to achieve the desired objectives. Minimization of indoor pollutants, adequate filtration and high levels of ventilation should, however, ensure satisfactory air quality during occupied hours.
Highlights
A study of 56 European office buildings found that their air quality was poor and that there was substantial dissatisfaction among the occupants (Bluyssen et aI. , 1996)
The energy used by a conventional ventilation system requires electricity, which is a greenhouse intensive energy source in Victoria
The other motivation for the departure from conventional ventilation thinking is the belief that fresh air in buildings is vital for occupant health and productivity
Summary
A study of 56 European office buildings found that their air quality was poor and that there was substantial dissatisfaction among the occupants (Bluyssen et aI. , 1996). The ventilation concept proposed for the CH2 building is in sharp contrast to the conventional approach. This difference is driven by a design philosophy based on two considerations. The other motivation for the departure from conventional ventilation thinking is the belief that fresh air in buildings is vital for occupant health and productivity. The aim of this paper is to assess the proposed CH2 ventilation design and likely air quality in the light of international precedents and best practice. The performance of other buildings is reported, with respect to the influence of their ventilation system on air quality, and the health and productivity of their occupants
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