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Blueair is the system for people living with alergies, asthma or other respiratory conditions, or for anyone who wants cleaner, more breathable air. A revolutionairy combination of advanced filter media and an encapsulated ion particle charging chamber makes it possible for the Blueaur air purification system to achieve better results than either technology alone. Our patented HEPASilent filter technology is proven effective at capturing 99.97% of the tiniest 0.1 micron particles. The quietest unit in the industry, Blueair's low-density filter clean larger volumes of air more quietly than any other unit in the industry. Hence the name HEPASilent(r) a Blueair Exclusive. Bacteria-resistant filters, Blueair's filters are made of bacteria-resistant polypropylene. Because polypropylene is waterproof, the filters naturally reist contamination from bacteria, viruses and mold without chemical additives or washes. And the filters only need replacement every six months, a process that takes under 30 seconds. The Blueair 501 is for room sizes up to 365 square feet.10 year limted warranty, Award-winning Swedish design
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Technical Details
- Air purification system for rooms up to 365 square feet- Sleek, contemporary, Swedish design; steel housing; easy to use and maintain
- 2-stage HEPASilent technology captures 99.97-percent of 0.1 micron particles
- Ultra-quiet operation; energy efficient, pleasant SurroundAir system
- Measures 23 by 20 by 11 inches; 10-year warranty
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By James B. Charles (New Jersey)
I have always had bad allergies. I've had several HEPA filters. Based on how well this is constructed, I can imagine it may be the last HEPA filter that I purchase. It is made of galvanized steel and is solid down to the speed setting dial. Filters are of average price for a unit of this size (about $50 every 6 months).
The unit is very, very quiet. Inaudible on the low speed. I keep it on 3 which you can hear, but it moves a lot of air. 4 is loud but good for quickly cleaning up the air if necessary. Air is electrostatically charged before moving through the filter media, which I have found is a worthwhile feature for HEPA filters.
If you have pets or a smoker in the house, you can purchase replacement filters with activated charcoal at an increased cost. Another nice feature. Filters are very easy to change and it takes only seconds to replace them.
Overall, I am most impressed with how well built the unit is. Nothing else I have ever seen even comes close. Most look like toys in comparison.
By Roger Berlind (NY, USA)
We've had several BlueAir purifiers for at least 5 or 6 years now and are very happy with them. They are quiet at low speeds and have very high ratings for the amount of air they purify. We bought ours based on recommendations from the Allergy Buyer's Club. My wife is allergic to our Norwegian Elkhound and is only able to tolerate him because of our BlueAir purifiers.
We like the two 402 units that we have more than the 601 unit. The 402 units have 4 speeds, the lower 2 of which allow us to sleep. The 601 unit only has 3 speeds, of which only the lowest is quiet enough to allow sleep or listening to music or TV in the same room. The 601 unit is good for a family room or living room as long as you turn down the speed while in the room. The 402 units are much better for bedrooms.
By S. Kim (TX)
I bought this air purifier last year from Amazon. This year, this air purifier decreases my allergy symptom significantly. This year I did not take any medicine so far. Comparing other brands, Blueair is the quietest one I have ever had except Sharper Image that has a problem with excessive Ozone creating. If you have an allergy problem, it is worth to use it. One problem was a setting location because the air direction is somehow odd. Air direction has left 45 which have a hard time to be located. Otherwise, it works for me!
By T. Tom (SF Bay Area, CA United States)
This is a great unit but it larger than I expected. If you have a small bedroom or office, it may look a bit imposing.
It runs very quiet at the two lowest settings and even at the third setting, I found the sound soothing enough to sleep with!
On the negative side, it has no electronic timer, remote or digital display like some of the other units have. It's also quite cumbersome and heavy to move and includes no caster wheels to make that easier.
On the plus side, it works very well and is more efficient and quiet than smaller units. The design is also more proven; I compared it with a smaller unit (the 250E) and the 400 series works a lot better for a number of reasons (better filter, it charges the particles so that they stick to the filter, larger, etc.) Also, because of the design, you can put things like books on top of it if you want to since it takes in and output air from the sides. You can also place it against a wall, something you cannot really do with the smaller 250E as it has the filter on the back.
All in all, this is a great unit as it performs very well is very quiet and well made.
By Steven H. Hicks (New York, NY)
I bought the 402 with the Smokestop filter as I smoke about 3 cigars a week in my apt in the wintertime. This model is good enough for my purposes, but if you smoke more than that I'd suggest the 501 instead.
As others have noted, the 402 is silent on settings 1 and 2 and produces about the same amount of noise as a tower PC fan on setting 3. Setting 4 is noisy so I switch to that setting just before I leave for work if I've smoked the night before. When I return at the end of the day there us usually little or no smoke smell.
I'd estimate the Smokestop filter to contain about 3 pounds of activated charcoal. Much more than the thin layer found in most filters.
The unit itself is very well constructed and for an air filter it looks stylish. Access to the inside for the occasional vacuuming and filter change is extremely easy (large hinged side door).
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