Swimming Pool and Spa Ventilation
and in particular roof ventilation is an aspect that needs to be
considered in the initial stages of wet area building design.
is the only form of ventilation suitable for wet areas in that it
it is continious and consumers no energy.
What ever other
devices may be employed in the area, such as dehumidifiers etc,
natural ventilation is critical
Before the selection
and implementation of appropriate natural ventilation equipment,
to wet area enclosures can be done, an understanding of the dynamics
involved needs to be established
It is not that
mechanical services should not be employed, however, they should
be a refinement to the theme and not the theme itself.
of indoor rain,
known as moisture precipitation,
is a situation brought about by the sharp contrast of thermal differentials
within and outside the area, occurring principally of an evening
during frost conditions being zero movement of air
of odour created by varying forms of chlorination,
mould etc.can also contribute to a degree of discomfort throughout
initial building design, careful consideration
as to the nature and or dynamics of the area ultimately determines
the necessary equipment required to resolve the problem.
retro fitting, a complete and accurate
assessment of the existing dynamics is required
ensure you do not resolve the problem by creating another problem.
It is fundamentally important
that wet areas are able to aspirate efficiently without dependancy
on equipment such as de-humidifiers, fans, and / or other mechanical
services, particularly in commercial facilities, when the area is
not being used.
not presume the architect has the knowledge
required to resolve or address the aspect of ventilation in a Swimming
Pool / Spa enclosure.
of building materials, due to
excessive moisture absorption is a common occurance. The lack of
appropriate ventilation brings about costly repairs, which could
have been prevented.
enclosure design is paramount
in ensuring that the building provides the maximum benefits whilst
requiring minimal maintenence.
areas need continuous and effective ventilation,
and in an appropriate manner. Fundamental to venting a pool enclosure
is peripheral air entry 400 mm from ground level, and a central
convergence of the air mass discharging to atmosphere. The higher
the peripheral air ingress, the greater the incidence of moisture
precipitation within the building, especially with a heated water
Flow venting is inefficient
and never appropriate for heated pool enclosures.