Is This Air Purifier Good For Allergys And Ashma?

Original Ionic Breeze Quadra Silent Air Purifier With OzoneGuard

i heard bad things about there old modles but this one is new with ozoneguard is this good for allergys and ashma also if you reccomend something else please leave a link to the product it can be no more 150 dollars thanks

http://www.sharperimage.com/us/en/catalog/product/sku__SI837GRY