A fan would be needed to get enough heat in - then the plastic flaps might go all floppy if his 100F claim is true.
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11 years ago
A use for all those beer cans...
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11 years ago
phew! - at least they're not as I feared: proof of pudding!
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11 years ago
Nor am I - but no-one has put a more convincing explanation forward.
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11 years ago
panels like this are usually run passively. The light film flap then opens when they get hot, letting the heat in.
plastic film's always floppy
A more efficient design is to use 3 layers of black plastic shading mesh. They're placed in such a way that front panel losses are kept very low. Ali cans are probably better suited to multiple glazing though, which can generate very high temps in summer.
NT
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11 years ago
Surprisingly effective. Now all I need is some sunshine...
Andy