The SUN OVEN is often compared with box cookers that are made out
of aluminum foil and cardboard. While the energy conversion
principles
are the same,
the materials utilized in manufacturing a SUN OVEN have been
carefully
researched to include the most efficient materials available. In
order to capture the
maximum amount of energy, achieve the highest possible temperature and
retain the
greatest amount of heat possible while minimizing the weight, the
materials
utilized have
been selected based on efficiency and quality.
For this reason the cost of a SUN OVEN is higher than what many
people
expect. When you compare a SUN OVEN to a conventional oven
that
will reach the same temperatures, it is a real bargain. When you
add to it the savings
achieved by not having to pay for fuel, and the fact that it will last
with heavy use for 15 or
more years, the total cost/ benefit ratio is unbelievable, not
to
mention the enhanced taste of
food and environmental benefits that cooking with the sun provides.
The reflectors are made with mirror-finished anodized aluminum.
They
will not oxidize,
rust, or corrode. While this material is extremely efficient and
aids in achieving superior
performance, it adds a great deal to the price required to produce
a
SUN OVEN.
(Over 50% of the total material cost goes into producing the
reflectors.)
The
design of the reflectors allows for maximum energy capture while being
able to fold up in
a matter of seconds for easy storage.
The black inner shell is formed from aluminum that has been coated with
a non-toxic,
high temperature powder coating. This coating absorbs the
sun’s energy
and enhances
your ability to clean the oven, while providing a durable non-rusting
surface
that will last
for years. This coating is baked on and does not emit any toxic
fumes
like other
industrial paints or coatings do as the temperature increases.
Unfortunately,
both the
material and the powder coating process add cost.
The interior is completely surrounded by a thick batt of
non-toxic
fiberglass insulation (normally found in commercial ovens and
furnaces).
This insulation helps the oven store hot air and your food stays warm
for
hours.
The insulation allows the oven to be used year round.
The outer shell is made of a highly durable ABS plastic, which
makes
it easy to clean
while remaining lightweight and portable. (The total weight is only 21
pounds.)
The gasket that seals the oven chamber is made from a patented material
specifically
designed to withstand UV radiation. It forms an air-tight seal to
hold heat in while
preventing out-gassing from building up in the oven’s chamber.
(This material
is
warranted for 15 years not to split or crack.) With proper care it
should
last a lifetime.
The wooden bezel is made of a specially milled kiln dried hardwood,
which
has been
stained for years of protection from the weather. The stain has
been
specifically designed
to protect the wood from the UV radiation of the sun.
The way the SUN OVEN works:
The black surfaces on the inside of the oven captures and
transforms the sun's energy into a form that cannot escape the oven
chamber.
When a SUN OVEN is focused in the sun, the interior of the oven is
heated
by the
sun's energy. Direct and reflected sunlight enters the oven chamber
through
the
glass door. It then turns to heat energy when it is absorbed by the
black
inner-shell and Levelator. This heat input causes the temperature
inside
the
oven to rise until the heat loss of the oven is equal to the solar heat
gain. The
light energy absorbed by dark pots and the oven's dark interior is
converted
into
longer wavelength heat energy. Most of this longer-wavelength radiant
energy
can not pass back out through the glass, ensuring more efficient
cooking.
The SUN OVEN is helping conserve energy and helps prevent
deforestation
worldwide:
The SUN OVEN is used in 126 countries around the world. In many
of these countries, they purchase unassembled SUN OVENS and
complete the final assembly on location. This reduces the overall cost
of the
ovens and shipping while creating jobs locally. The demands of massive
population growth, and inefficient conversion of wood to charcoal, have
outstripped the third world's forests ability to regenerate. The
ecological
effect
of wood fuel is burdensome and has a far-reaching negative global
impact.
These global trends will lead to environmental destabilization leading
to
deforestation and global warming. Science strongly supports the fact
that
deforestation for agricultural and fuel use is changing weather
patterns,
causing
soil erosion, and depleting plant and animal life. SUN OVENS offer a
powerful
solution to the effects of deforestation, and can have an enormous
positive
impact on the everyday life of millions of people in underdeveloped
countries
by
improving their nutrition, health, and quality of life.