Hamilton Beach 04492 True Air Ionic Air Purifier

October 2007. Based on the limited number of reviews available, it appears that the Hamilton Beach True Air Ionic Air Purifier 04492 is appropriate for small (180 or fewer square foot) rooms. AllergyBuyersClub.com likes the fact that this machine's permanent filter only needs to be vacuumed a few times a year, rather than replaced, but also note that the 04492 is loud on its higher speed settings and lacks a pre-filter. Owners posting on Amazon.com like this air purifier, but nearly all of them complain of noisy operation. For more recent reviews, please see our latest update on air purifiers.

Frustratingly, the one Hamilton Beach air purifier that's tested by Consumer Reports and discussed in depth by Air-Purifier-Power.com -- the 04163 -- is no longer manufactured, and what appears to be its replacement, the Hamilton Beach True Air Ionic Air Purifier - 04492, only pops up in a couple of sources. This air purifier is thoroughly described by AllergyBuyersClub.com, and receives a handful of reviews from owners posting to Amazon.com, but we didn't find enough data to come to any firm conclusions about its performance.