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Good (0–54 ppb)
No cautionary statement.
Moderate (55–70 ppb)
Unusually sensitive people should consider reducing prolonged or heavy exertion outdoors.
Unhealthy for Sensitive Groups (71–85 ppb)
Children, older adults, active people, and people with lung disease (such as asthma) should reduce prolonged or heavy exertion outdoors.
Unhealthy (86–105 ppb)
Children, older adults, active people, and people with lung disease (such as asthma) should avoid prolonged or heavy exertion outdoors. Everyone else should reduce prolonged or heavy exertion outdoors.
Very Unhealthy (106+ ppb)
Children, older adults, active people, and people with lung disease (such as asthma) should avoid all outdoor exertion. Everyone else should avoid prolonged or heavy exertion outdoors.
Children, older adults, active people, and people with lung disease (such as asthma) should avoid prolonged or heavy exertion outdoors. Everyone else should reduce prolonged or heavy exertion outdoors.
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Our community has rated this post as helpful. If you agree, why not thank anks
Our community has rated this post as helpful. If you agree, why not thank hansmoleman007
I've had the 403 model in our bedroom since 2012. It's a predecessor model that looks virtually identical to this (think they use the same filters too) and it's still quietly humming along in our bedroom. Works great with no issues at all, but as you mention the filters are expensive. The one's with the activated carbon are hard to find for less than $100. The particle only filters are around $60. We use the activated carbon filters. Technically you're supposed to replace it every 6 months, but I usually push it to 9 months. Particle filter is fine at that point, but the carbon is probably saturated before that.
Our community has rated this post as helpful. If you agree, why not thank Gnomeslayer
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i have bad allergy for most of my adult life, so have researched and used quite a few of air purifier. BlueAir is a good brand.
They call theirs "HEPASilent" and they say it delivers "HEPA performance" which doesn't really mean anything.
The winix has a lot cheaper filters (even more so buying clones on Amazon) I have both in my house, if you don't need the "smart" features I'd stick with winix.