I use an air purifier at home but maintenance is quite a hassle .I need to wash it regularly and make sure I replace the filter every couple of months . I don't think that additional ionizer filter is required since you are using the air purifier for the baby room and ionizers release ozone which can irritate the developing lungs of infant.The Clair air purifier design looks pretty good and looks like the technology is new. Just make sure the filter life is long and cleaning isn't a problem .