ventilation is simply providing ventilation and/or conditioning
through means of natural airflow through building openings.
The obvious benefit of this is energy savings from not
using ventilation and air conditioning equipment such
as fans, chillers and pumps. Building occupants are
known to benefit from natural ventilation through increased
energy, better moods and increased productivity. It
is one of the simplest and inexpensive methods to provide
occupants with refreshing outside air. It is not always
as simple as just providing multiple operable windows
in a building. Wind patterns specific to the site should
be considered and can be utilized by locating fenestration
to enhance natural airflow through the building. A common
method is by locating operable windows at a high level
such as in clerestories or openings in a thermal tower
as well as at the occupant level. This serves to naturally
cool a space effectively by exhausting warm air at the
high level while pulling in fresh cooler air at the
low level through buoyancy pressure differences.
Though care must be taken to avoid
having a wind tunnel effect in areas of the building.
This obviously provides an undesirable effect of an
excessively windy environment, especially a problem
if paperwork is carried out in the area. The type and
placement of operable windows or dedicated air inlets
and outlets is critical in directing air into and out
of the building so they provide both ventilation and
cooling of interior surfaces. Interior spaces should
be arranged to ensure that dead-air pockets in occupied
zones do not occur.