electrical calculation please
We are looking at a portable dehumidifier. It apparently runs off a/c via a d/c adapter. specs says it draws 20w DC and is " energy efficient " How much of and energy hog will it actually be?...
Forum Discussion
DFord wrote:Agree with DFord. It also depends on where you live. In Florida I needed a dehumidifier in the RV of a winter. The windows were like a waterfall and you felt damp. Where I live in Kansas I need a humidifier of a winter in the house. It can get so dry the skin on your hands crack and lots of static electricity.
Humidity is always "relative" to the temperature. As air is cooled, it can't hold as much moisture as it did when it was warmer. Conversely, as cool air is warmed up, it can hold more moisture. It's relative humidity goes down as it's warmed up as long as more moisture isn't added.
With that background, you can understand that bringing in cold outside air into your house in the winter lowers the relative humidity indoors. It gets as dry as a dessert making static electricity a problem. Dehumidifiers shouldn't be needed in the winter unless your space is really tight and no "infiltration" occurs.
Example:
If you bring in 35 degree air at 100%RH, and warm it up. it becomes 70 degree air at 29%RH.
