My piano came with this type of dehumidifier rod too, But I always wonder the efficiency of this rod. It uses heat to vaporize the moisture in the air, isn't it moisture is already a vapor in the air ? The rod doesn't condense the air into water nor it absorb water like silica desiccant.
Buy from Shopee ma... cheap cheap nia.
Last time, I put hygrometer overnight  in the air tight storage box with hippo and 1kg silica inside but I forgot the reading liao 
Need to search for the record.

According to what I read long long time when search for this rod, if the temperature above ambient temperature, moist will be less in atmosphere. Just like desert. Hot and dry.

So this rod heat up the surrounding above the ambient temperature to vaporise it. Since it in closet, the moist to vaporise is much less. That's why this rod don't require high watt to run.

Actually it is not the moisture will be less in atmosphere when the temperature goes up, it is the relative humidity reduce when temperature goes up, because higher temperature, higher saturation point, hence, moisture content remain the same but vapor saturation point goes up, relative humidity goes down.

Pulling this thread up after 5 years.

Looking for a dehumidifier for an air lock room.
Finding mould starting.

Hopefully more people have used the common brands like Delonghi or Firenzzi to share their reviews. Thanks!

Need some feedback and help, anyone using this machine?

https://shopee.com.my/Xiaomi-Mijia-Smart-De...33-1bb5c99f505a

The price is kind of high and does it have local warranty?

I choose stadler form which has 5L water tank. I can purchase extended warranty for It too.