Good question, if hot air enters at the bottom the hot air rises and picks up the moisture it becomes heavier/cools and wants to drop back down and frustrates more hot air rising. With the hot air entering at the top it, as it grabs the moisture from the food it becomes heavier/cooler drops and is either pushed out by the newer hotter air entering the chamber or sucked out by the fan and/or the convection in the chimney (paint the chimney black helps with convection). Built a small one a few years ago for drying apple slices, and am just about to build a bigger version to do wheat and oats.
You can get rid of VOCs and let some fresh air into your home (or fridge in this case) by opening a window, using the exhaust fan in your kitchen or bathroom , or having a mechanical ventilator installed
Great idea :) Thanks... I will try. Hugs from Brazil!
Good work done
I really love this
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clever!
Nice idea!
Wouldn't it be better,if the air canal was in the bottom,since hot air goes up?
Good question, if hot air enters at the bottom the hot air rises and picks up the moisture it becomes heavier/cools and wants to drop back down and frustrates more hot air rising. With the hot air entering at the top it, as it grabs the moisture from the food it becomes heavier/cooler drops and is either pushed out by the newer hotter air entering the chamber or sucked out by the fan and/or the convection in the chimney (paint the chimney black helps with convection). Built a small one a few years ago for drying apple slices, and am just about to build a bigger version to do wheat and oats.
Thanks for Sharing David, great device.
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Great....
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Nice video ! I intend to build this dehydrator here in Florida. Hope the humidity is not a problem.
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Why didn't he stain the mesh a dark color? That would increase the heat transfer and speed the dehydration.
I like the reuse of the refrigerator. Any concerns with the plastics outgassing?
You can get rid of VOCs and let some fresh air into your home (or fridge in this case) by opening a window, using the exhaust fan in your kitchen or bathroom , or having a mechanical ventilator installed
Just put a small fan to draw out the air and get it cycling. Probably put a solar panel on the fan so it's self powered
How to control temperature ?
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make sure this silver paper is not aluminium
Maybe check out thin gauge sheet metal instead of aluminum foil