![Atlanta Healthcare Hepa Pure Beta 350 7-Stage 43-Watt with H13 HEPA, Ionizer, Anti-Bacterial Filter, Activated Carbon, TiO2 And Uv Air Purifier With Remote, White [Air Flow = 225 Cum/Hr]](https://m.media-amazon.com/images/I/31Tb+XtzOVL._SY300_SX300_.jpg)
We bought three (3) of these for my in-laws' house in Kolkata for when we were visiting from the U.S. Short version: We think the air in the house has been noticeably better than before even though Kolkata is experiencing bad air quality (between Christmas-New Year's 2016), and can physically see what the filters are taking out of the air. This has made the visit a lot more pleasant. We're coughing less than other visits.
Details/notes/observations:
We bought three of these Atlanta units, putting them in different rooms -- living/dining room, and two bedrooms. Largest room is about 300 sq. ft. just below the maximum capacity of the unit.
Installation was easy and straightforward although it appears that the manual may have been for an earlier version, there were some small differences, e.g. how the pre-filter was held in. However, everything was straight-forward and easy to set up.
Noticeable dirt started appearing on the HEPA filter (the middle one) after about only 12 hours of use. By after 6 days, there was noticeable dirt build-up even on the pre-filter -- the first one, and also on other filters, in addition to the interior walls of the unit.
Unit is very quiet, we left them running on the fastest setting all of the time, the sound was minimal compared to the outside noises, and didn't affect sleep at all.
Air quality sensor. The sensor display on the front appears to reset and start again if the unit has been turned off. If the air quality had degraded where it was showing red on one unit, at least one of the other units would also be at least at the yellow stage. So the units' sensors do appear to move together as air quality shifts. My sense is that the unit in the largest room was most likely to be at the "worst" air quality reading, which makes sense since it was trying to deal with the largest volume of air.
After six days, we bought a vacuum cleaner to clean out the filters of all of the units. By that point, noticeable dirt had accumulated at the first filter in all of the units, the pre-filter. The second filters were also discolored due to what they had caught. We cleaned out a lot of dirt out of all units, which said to us that it was working, it was pulling things out of the air. The rooms were being swept and cleaned every day also. We just used a vacuum, haven't tried to wash that first filter.
The design of the unit is nice and simple. It is good to be able to get to the filters and take them out without using any tools. Labeling of the filters and how to put them in is also very clear.
We have not used any of the features such as the ionization or UV sterilization, so can't comment there.
Changes/improvements:
1) Better manual needed.
2) Ability to order replacement filters on Amazon would be nice.
We're now heading back to the U.S., but these will stay at my in-laws' waiting for the next visit. So very happy with the performance and the improvements it made. We showed my in-laws how to clean the filters in case they're using them.
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