I have severe allergies in September. I think ragweed is what does it and I live in Southern California, so the wildfires that spring up during this time don't help. I use this filter during this time and it helps me so much. I go from having hay fever to just having a stuffy nose. If you have ever had hay fever, then you know stuffy nose is a great improvement. I have used this in an 8x8 office, a 12x12 bedroom and in a 15x20 room. Obviously the smaller the room, the more effective, but I think it helps in the larger room as well. I use it with a portable A/C in the largest room, so that A/C is pushing out air and filtering the inside air as well. Without bringing in new air from outside.
I think it works well and makes a slight humming noise on the lower settings. A bit of a rattle on the highest setting. I can't sleep with it on high. The 2 lower settings are actually great white noise for sleeping. It is light and easily portable. Get more detail about Honeywell HHT-081 Tower Air Purifier with Permanent HEPA Filter.
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