The Honeywell 18155 is a mid-range air purifier that features a “True HEPA” filtration system; this means that the filter has been tested to capture at least 99.97% of particles as little as 0.3 microns in size.  As with many other air purifiers, the 18155 also has a carbon pre-filter, that keeps other larger particles…

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The Honeywell HHT-011 air purifier is a good alternative to other more expensive units. This is a basic unit, that doesn’t include a remote control or an advanced LCD display, but it does have an advertised permanent filtration system, a washable-filter and an optional ionizer for a fresher air.