I've used this cooker for three summers and I enjoy it.
Cooking and making ice with the funnel cooker/cooler will permit
a significant change in lifestyle. If you think about it, this
could help a lot of people. The BYU Solar Funnel Cooker uses
the glorious sunshine -- and the energy of the sun is a free
gift from God for all to use!
XII. Answers to commonly-asked questions
Will the cooker work in winter (in the United States)?
As the sun moves closer to the southern horizon in the winter,
the solar cooker is naturally less effective. A good measure of
the solar intensity is the "UV index" which is often reported
with the weather. When the ultraviolet or UV index is 7 or
above--common in summer months--the solar cooker works very well.
In Salt Lake City in October, the UV index was reported to be
3.5 on a sunny day. We were able to boil water in the Solar
Funnel Cooker during this time, but we had to suspend the
black jar in the funnel so that sunlight struck all sides.
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