I don't understand where you place it to "recharge". Putting it outside in -5 degrees is not an option. Where have others placed it? Thanks

Just plug it into any wall outlet. It generates a small but harmless amount of heat. "Recharging" is an imprecise term. What you are doing is actually heating up the device with a small internal heating element, which dries out the silica dessicant inside the frame, which, when "charged" or more correctly redried, allows the silica dessicant to again absorb moisture at a higher rate. When the Dessicant has lost its blue color, it absorbes moisture at a less efficient rate. The blue is restored by flipping up the outlet tabs on the back of the unit, and plugging it into the wall to engage the heating element. This product is made for small spaces, not to dehumidify your house. Main use is for gun safes, tool boxes etc.

Does this work on 220-230v without a stepdown transformer?Thanks

Yes, it works on 220-230v without a stepdown transformer.

I get a lot of moisture around my windows in the winter, would this help if I put it on the window ledge?

I agree with Gina. In my case, I had a lot of moisture with my old, single-pane windows and, come to find out, my furnace had an automatic humidifier on it so I shut that off and now use other, less "wet" methods for humidifying only the areas in use, in the winter. So, moisture around the windows lets me know that I'm humidifying too much.

I was thinking of putting these inside an air duct to prevent mold. Does the back need to have open access to air?

Silica gel is a granular, vitreous, porous form of silicon dioxide made synthetically from sodium silicateworks by the adsorbtion of water in the air clinging to the silica gel's surface. It can only adsorb moisture from the air it comes in contact with. You won't see these beads become swollen and soggy; they can't grab and hold that much water. I believe the weight ratio of gel to the amount of water it can hold is about 40 to 1. So 40 grams of gel could hold onto about a gram of water. Silica gel works best in high humidity and poorly at low humidity.

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💧 Stay dry, stay fresh—wherever life takes you!

COMPACT POWERHOUSE - Sleek, lightweight design fits anywhere—from closets to cars to gym bags—keeping your spaces fresh.
SAFE FOR ALL SPACES - Non-toxic, child- and pet-safe materials ensure worry-free use in any environment.
LONG LASTING PERFORMANCE - Rechargeable silica gel beads absorb up to 6oz of moisture, lasting up to 30 days per cycle.
EFFORTLESS HUMIDITY CONTROL - Hang & go design—spill-free, mess-free, and 100% cordless for ultimate convenience.
BUILT TO LAST WITH CONFIDENCE - Industry-leading 5-year warranty guarantees durable, reliable moisture protection.

The Eva-dry E-333 Renewable Mini Dehumidifier offers cordless, rechargeable moisture absorption for spaces up to 333 cubic feet. With a sleek, portable design and a 20-30 day recharge cycle, it provides safe, long-lasting humidity control without spills or mess. Perfect for closets, cars, and small rooms, it comes backed by a 5-year warranty for dependable freshness.

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Brand	Eva-Dry
Model Number	E333
Color	white
Product Dimensions	15.88 x 3.18 x 12.07 cm; 453.59 g
Capacity	170 g
Power / Wattage	22.5
Voltage	110 Volts
Material	Plastic
Number of Speeds	1
Special Features	Renewable solution to excess moisture
Item Weight	454 g

Eva-dry E-333 Renewable Mini Dehumidifier

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