Looking for good air purifier for bedroom.?

I’m looking for a good air purifier that I can use in my bedroom. Bedroom is about 11 x 10 feet. I have allergy problems that require me to take daily allergy meds and monthly allergy shots.

I do not want one with the OZONE feature. I have found that the purifiers with ozone give me bad reactions -throat tightens, head hurts, etc.