Energy saving by ceiling fans

  • YEAR
    Szokolay AM, Steven V.
    2006 Conference Papers
    Building and Energy


ABSTRACT: In warm-humid climates, such as coastal northern Australia there is a tradition of open-air
life style, with houses having no sharp boundary between inside and outside. Houses have been
designed for full cross-ventilation. However, the recent proliferation of air conditioning changes this life
style and dramatically increases energy consumption. It would be highly desirable to design houses that
obviate the need for air conditioning, but it is difficult to legislate for such designs. Cross-ventilation may
be prescribed, but air movement can be generated also by ceiling fans, that extend the upper limit of
comfort. Such ceiling fans can be considered a ‘fixture’, rather than a portable appliance. How can this
be recognised in house energy rating? The paper examines the magnitude of such cooling effect and
estimates the effect of ceiling fans both in terms of air velocity and savings: it examines how far these
can delay the escape to air conditioning.


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