Double Turbo Snail Blower
thingiverse
This is a versatile double turbine fan system. The first fan efficiently cools down the cold end, while the second one effectively heats up the bed. I've opted for a 24v dc fan, but it's also possible to use a 12v version with the same compact design. https://www.banggood.com/index.php?item=1813289&cat=DV22191813289201506&custlinkid=577583
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