Passive Solar House Design Examples
- Northern Territory -
Eagle Eye - Darwin
The owner of this dramatic home is Mike Rozak. As a computer
programmer and software developer,
Mike wanted a house that was unique. Designed
by Troppo Architects and built by Tag
Construction the house is definitely unique in its style
but it effectively incorporates all the
sensible principles of tropical passive solar design.
There are basically two seasons where the house is located
- the "Dry" season from April through
September, and the "Wet" season from October
through March. The dry season has high
temperatures of 32 Degrees Celsius and lows of 17 at night
with no rain for up to six months at
a time. All of Darwin's rain (about 2 metres of it) is
saved up for the wet season, with highs of
36 Degrees Celsius and lows of 22, compounded by 90% humidity.
Darwin is also visited by
cyclones, some of which have done terrific damage, so
all in all it is quite a demanding climate.
The other prevalent type of house was built as a kind
of bunker. They are low to the ground,
built with cement blocks, core-filled to withstand the
impact of flying debris from cyclones and
the large louvered windows are reduced to small holes
that would keep out flying missiles.
Locals affectionately call them "hot boxes"
and during the wet season the inside temp is 32 during
the day and 31 at night. Air conditioning is therefore
required. The owners goals included
letting the structure show through, like Frank Lloyd Wright's
houses. Also, to let the house be what
it is, be low maintenance and take advantage of the house
site and climate. Mike wanted a
house that people would notice, although not so outlandish
that it would offend the neighbours.
I'd rather have my house use plain-looking
finishes, but have it last. Of course, building to last
isn't cheap, especially when your house must survive cyclones,
bush fires, termites, and floods.
Eagle Eye is elevated, providing more of a breeze than
if it were on the ground. The elevation also
improves the view, provides protection from termites,
and makes it a bit more difficult for snakes
and insects to get in. The house is divided into three
sections, the main living area with kitchen,
dining room, and living room, and two bedroom wings, each
of which has two bedrooms and a
full bath. Dividing the house into three sections maximizes
the breezes because each section is
only one room deep. This means that every room has a view
and it solves some of the intra-house
noise problems. The house feels larger than it actually
is. Even though the house is only about 200
square meters, it's 30 meters from end to end. In the
center of the house, joining all three sections
together, is a tower that people can climb to get a 360
degree view.
The house's structure is entirely steel. The roof and
walls are zincalum corrugated metal which is
long lasting, termite safe, and non-flammable. The metallic
coating also reflects much of the
sunlight, helping to keep the house cool and it is easy
to clean. The interior walls are plywood.
It's easy to clean and fairly difficult to damage. Most
of the floors are decking hardwood with small
gaps to further promote airflow. The walls are mostly
windows, either louvered windows or a
wall of insect screening. Not only is insect screening
cheaper than louvers, but it's barely visible.
People feel much more exposed to nature, especially when
a downpour is blown in through
the screens. The house employs a solar electricity system
and collects all its own rainwater.
All appliances and lights are energy efficient and the
cook top and oven runs cheaply on gas.
For more information regarding building or renovating,
check the website: Northern Territory Government Department of Infrastructure,
Planning and Environment www.lpe.nt.gov.au
For another great example of responsible tropical design,
click here
ANZSES Australian
and New Zealand Solar Energy Society. Last updated: August/05
Contact Julien Lacave, Renewable Energy Promotions Officer: info@solarhouseday.com