I cannot tell if the unit is actually working - there is no sound or noise at all. I can only ASSUME it is working because the blue light on top is on. Since it has been used for less than a month, I prefer to withhold comments at this time.
This little machine made my hayfever completely manageable! I was taking 4 doses of Clariton a day plus decongestants and very miserable. Just using this at night calmed my system down enough to last most of the day. I love it so much I take it up to the cabin on weekends and other overnight trips (by car). One annoyance: I clearly ordered the BLACK and they send me CHERRY wood. I don't like the color at all, but as soon as I plugged it in, I didn't want to go without it for a week or two to straightened it out. Two drawbacks: the assembly instructions were not very clear for putting in the filter but after doing it wrong once I figured it out. Also, on the electrical, it warns you not to plug it into a 2-hole outlet (as in the old ungrounded kind from the 60s) with a converter, you must use the 3-hole outlets that have the ground. One house I stayed had only old electrical in the guest room and I didn't dare use it.
For an entry-level air purifier, this Mammoth Classic really does the job. I have COPD plus severe allergy so imagine I had to get up 2 or 3 times every night because of discomfort. I'm happy to report that I rarely do that now. I could really feel the difference of the air quality in my condo. I have a dog too so this really helps. I only use the ozone when I take my dog for a walk. When I get back I turn it back off. I just wish this one had a remote. I would definitely buy this unit again given the opportunity. Merci Mammoth!
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