Paper 2
Energy Efficiency
Design for a House with Temporary Heating and Winter Daytime Cross
Ventilation
Bin
Su
School
of Architecture, Unitec Institute of Technology, Auckland, New Zealand
Abstract
According to the local climate in Auckland, New Zealand, a house does
not normally need any active cooling controls such as air conditioning or
ceiling fans during the summer. Temporary heating is mainly needed during
the winter night. In addition, winter daytime window ventilation is
required to remove moisture arising from daily occupant activities. A
previous study (Su, 2008) showed that additional winter energy consumption
is needed for space heating, for hot water heating and for other
appliances that are impacted by the winter conditions. Winter energy
consumption is also a large portion of the annual energy consumption of
Auckland houses. This study focuses on the impact of building passive
design on housing annual energy consumption. The quantitative
relationships between building design data and annual energy consumption
data are valuable for developing passive design guides for housing energy
efficiency. This paper shows how energy consumption can be reduced by
optimizing wall and roof design resulting in between 40 - 70% reductions
in energy demand from 2000 levels.
Key words: Building passive design, house, house design, house
energy consumption, housing energy efficiency.
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