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The suggestion about a PVC chimney with a cap on top set me to thinking a bit about how to encourage the air flow out the vent. I am a bit of a solar power tragic so the idea I have is to use a battery to run a dew strap rolled up and fasten into one end of the PVC - they draw a small amount of power only and a battery would be able to run it for several hours. I would like to experiment a bit. and would be glad to hear suggestions.
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