Air purifiers, what to get?

Hi, i am inside all of the time and suffering from allergies i think. So i think it may be time to get an air purifier.

I have been trying to research them but there seems to be very mixed reactions. What is the best to buy in the £50-100 price range and will it be effective?

Every one i find that looks good. be it have no filter or a hepa one, some reviews say its horrible, some say it produces ozone which made things worse. some say it was the best thing they’ve ever bought.

I’m really confused on what to buy to try help me feel better, as i am constantly tired and feel full of cold.

Could you suggest what one to buy? And if it has helped you feel better overall?

I like the looks of the Bionare BAP825RC & Heaven fresh XJ-2100UV but again, mixed reviews