Eva-dry E-500 High Capacity Renewable Wireless Mini Dehumidifier - 4 Pack - Fight dampness in boats, safes, RVs and BIG close

This product claims that one unit- is good for 500 cubic feet- will absorb 8 to 10 oz of moisture in 6 to 8 weeksMy travel trailer volume is about 1200 cubic feet (23'x 8'x 6.5'). So, I bought the 4 pack and put 3 into the trailer. The humidity did not decrease. We had it in place for about 4 days. The Eva Dry never seemed to get any heavier and the crystals did not change color. It's totally ineffective for a travel trailer. I returned it. Kudos to Amazon for a swift refund.After seeing that Eva Dry was not working I did some research and found that for a trailer like mine you need to have a dehumidifer that can remove about 3 pints of water per day. That would be 48 ounces of water per day. The Eva Dry only claims to be able to remove 8 to 10 ounces per unit and that it would take six weeks.To put this in perspective, a quick google search shows that an average human exhales about 12 ounces of water per day. If two people spend 1/2 of their day in the trailer, 12 ounces of water will be added to the air. If it's not removed it will condense on the windows and probably in places you can't see. Note this is more water than the Eva Dry claims to be able to remove in six weeks.I've ordered a dessicant style humidifier that can remove up to 13 pints of water per day. You can find it here on Amazon but if you live in California Amazon cannot ship it to you. Look for "ivation 13 pint dehumidifer". According to my research (but not experience yet) this active dessicant style humidifier is a good choice if you live in a cold/rainy climate. They also work in higher temperatures, but not as well as the refrigerator type dehumifiers.

In the process of building a house and selling another, so got a storage unit. Not climate controlled. One very humid day I stopped to drop stuff off and noticed the boxes felt damp. There is no electrical outlet to plug in a humidifier or place to drain it, so did some research. I use smaller versions of the Eva-dry Mini Dehumidifier in my safe and it works great. I was going to order a few when I saw they have these larger ones. I use two of these in the 10' x 15' unit and rotate them with the other two, recharging the two not being used. They work great and last longer than a week. They are usually still showing dry or medium at worse after a week. I also use one in our freezer to help stop with freezer burn, can't say I have noticed much of a difference there but saw it on a review and gave it a try. But these are great little units.

We purchased two of the 4-Packs (so we have 8 units total) and these units work great!First, make sure to read the instructions.Second, the E-500 is not supposed to be or designed to be plugged in while doing its job: on the boat, inside the cargo trailers, or inside the wardrobe clothes closet at home as this is where the E-500 silently and odorlessly does its work.The E-500 is only supposed to be plugged into an electrical surge protector when drying out the internal moisture media and then promptly unplugged and situated so it can be put back to work. When you notice the E-500 sight window shows the internal moisture media has changed to green it is now time to re-charge (drying out internal moisture media once again) by plugging back into the surge protector for less than 12 hours (or until the sight window turns to orange).And last, when registering the E-500 onto the Eva-Dry website, each of our eight units purchased were individually registered.

We bought 8 of these for winter in our RV and they are OK. I think they would be excellent in a very small space (like a tiny closet). There is a slight learning curve with the plugging them in to dry out etc. Mine came already spent (pink) so I had to plug them in before I was able to use them, but they appear to be working properly, they turn pink after 2 weeks in various places in my RV, but there is a TON of condensation in the RV in the winter. I like them enough that I might invest in 4 more, just to put in various closets etc. Mine take about 16-18 hours of being plugged in to turn blue.

I returned the four units just before the refund cutoff because the recharge plug on one "froze" in the open position. Since the recharge plug folds out of the base, this made the unit unusable unless hung. Here's what I found using these for several weeks. Note that I live in a condo on the Atlantic; because it's been such a hot summer, the doors and windows have been closed and the A/C units have been on constantly.In my 13' x 18' living/kitchen area, I had to recharge the unit every 36 hours. In my bedroom and its closet, every 24 hours. In my attic, every 18 hours. Since the recharge time is about 18 hours, you have to have two units for each area you want to keep dehumidified continuously. I found the units too heavy to plug directly into an outlet and had to use an extension cord. Since the recharge plug is in the base, I had to hang them or lay them on their sides to recharge. THEY GET VERY HOT WHEN RECHARGING, so I lay them on an ironing board. They did not get hot enough to burn the cover like an iron would, but they were too hot to hold longer than it took to unplug them.The frequency with which I had to recharge them leads me to believe they are only suitable for a small area (like a closet) that only gets occasional humidity.

We have been using their products for years but when they came up with these new models, they don't recharge correctly.The company sent me 4 replacements but now only 1 fully recharges. The other models that I ever purchased lasted for 10 years or so. These are faulty and now as good as the smaller products and the original products..

These worked very well the first time I used them and then never worked again. No matter what I do these things will not dry out and reset even when the ambient humidity is in the 20% range. I have plugged them into the wall and on a power strip and nothing has worked. Ended up buying the standard little buckets with silica sand in them since I KNOW those work.