Quote Originally Posted by WOXOF View Post
Thanks for the info Craig. The owner's manual for this unit states that the HEPA filters, on average, need to be relplaced every 12 to 18 months. The carbon filters need to be replaced about every 6 months.

This thing takes 3 filters at $25 each. At least it comes with an extra set of carbon filters.
Yeah, I had a Panasonic that gave similar numbers. I ran the unit 24/7 and there were two of us smoking cigarettes plus there was the incredible shedding dog. Substituting "weeks" for "months" was more like it.

It all depends on the size of the room, pets, number of cigars smoked, circulation, how long the unit is on, etc. Also, it isn't an on/off thing. The filter eventually clogs - but it still filters, just not as efficiently.