Negative Positive
Title: Nice, but not inexpensive to operate
Review: I have two of these in my home, one in my office and one in the bedroom. I definetly notice a difference in using them.For anyone that may be wondering, this device uses appx 80-85 watts at full speed, 50-52 at medium, ~37 watts at low speed, and 1-2 watts plugged in but not running. That, coupled with the $20 replacement filters doesn't exactly make these things cheap, but I think it's worth it.I think it is worth mentioning that you can get "custom" filters for less than the cost of the 3M filters. There are several websites where you can tell them the dimensions of the filter and they cut them up for you.
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