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3M is a reputable manufacturer of filtration equipment and I respect their ability to make an effective product. I purchased two of their filter units that utilize the same filter media (of which there are oodles of varieties out there-- I just wanted to keep things simple so ordered 4 replacement filters to have in stock for the next year or two). This tower style air filter has a smaller footprint on the floor and works well in a corner or by the stairway in my main living area. I've also used it in an office room. My son was sneezing and we thought it may be allergy related. I felt that HEPA filtration may be useful in the COVID winter of uncertainty. If one of us gets sick or put in quarantine/isolation, this could help keep their air separately clean from the rest of the household. The unit is fairly quiet on the low speed setting, and we tend to leave it run whenever someone is in the room when more than one of us is home, or when the person with allergy symptoms is in the house. I realize that dusting of surfaces in the home is also important to making the filter last longer, so am also keeping up on that so the filter doesn't just get loaded with random house dust. HEPA filters can pick up smaller particles down to the aerosol size range, and they actually get more efficient at filtering as they get loaded up (although the throughput of air may diminish then). Some other models of this product use a more efficient DC motor which is something I considered, but they cost more than what I ended up paying for my purchase of this as an open box return item. I'm guessing that the cost of the replacement filters will still be more than the cost of the electricity to operate either this unit or the DC powered version. A recessed handle on the side of the unit provides a useful function when you are moving it around from room to room. The unit is not heavy, but also not flimsy. The control button pad on the top of the unit is touch sensitive, not mechanical. I'm hoping it doesn't get fried in any power surges if the power goes out in a storm. So far, so good.Read full review
Verified purchase: Yes | Condition: Pre-owned
I liked it so much I bought a second one.
Verified purchase: Yes | Condition: New
