Ionic Purifier from the Sharper Image
I have 2 full sized ionic purifiers, one jr sized ionic purifier, and one wall plug in ionic purifier from the sharper image. I have owned them for 2-3 years.
I purchased them guilt fully enough not only because of the good reviews I have read, but because Sharper image is just so darn trendy.
The wall plug in makes a gross "singe" looking stain of dirt around it on the wall. I do not believe it does anything other than make my wall dirty.
It is designed for a very small room like a bathroom. The full sized ones do seem to remove a good quantity of dirt, as seen when cleaning the plates.
The rooms they are in smell nice, and do not have lingering odors. The air does seem slightly dry, but that may just be my imagination.
The Jr sized purifier does not seem to get enough air flow through it to clean as well as the full sized ones, even proportionally.
All 4 purifiers have no moving parts, and clean by particle charged metal plates within the units, that attract particles of dirt via the static charge on them.
The cleaning cloth included with the units works super well the first few times you use it, then slowly loses its ability to pull the dirt off of the metal plates with ease. It is still reasonably easy to clean, and there are no filters to replace.
They have made a difference in my boyfriend's seasonal allergies, but like I said, the full sized ones work, and the jr size and wall socket ones don't.
My boyfriend can really tell a difference in the rooms with the full sized units. They use very little electricity, like 10 watts or less.
These are the only air purifiers I have owned other than the main filter for the house ventilation/air conditioning, which is just a plain old cheap filter.