Two BreatheSmart units are definetly removing a lot of the dust from our house. I have two BreatheSmart units that seem to be working very well. We have an unusually high volume of dust in our house. The source is probably our coal burner. We have used a coal burner for 25 years without this problem. So we can't be sure of the dust source. I will say the BreatheSmart units have helped a lot, but they have not removed 100% of the dust. We get a noticeable amount of dust every two or three days on the furniture. Before the BreatheSmart units were installed we could notice a lot of new dust on the furniture everyday. My next move is to shut down the coal burner to see what happens. One of the units is noticeably noisier than the other when they are both running at the same speed. It seems like there is some internal vibration with the noisy unit.

so good i liked -

Outstanding Product We have one of the Alen room air purifiers (T300) for a couple of years now and it works as advertised. We receive our air filters every six months and are very satisfied with their service. This year at Christmas time they even reduced the cost of their filters which made it even better. Amazing product with great service!

Great but need battery backup My Alen filters, all four of them, are super and quiet. But with one second power blips common, we often find that the filters have been turned off and have to be manually turned on again. It would be ideal if they could incorporate just a few second backup to not not shut the machine down on a power blip.

Creates clean, sweet smelling fresh air. We love our new Alencorp air purifier. I am no longer suffering allergy symptoms from indoor particulates created from our wood stove , or by our sweet dog. The air is fresh & clean and we are all much healthier & happier having purchased our Alen and running it daily. Thank you!