You should have a vent on the bathroom cieling, which allows air to escape. So you could just buy a bathroom exhaust fan and have someone install it possibly. (100 bucks at home Depot, 65 bucks on amazon.) https://www.amazon.com/AmazonBasics-AB-BV100-ventilation-4-inch-Outlet/dp/B089R8S365/ref=mp_s_a_1_1_ffob_sspa?adgrpid=159313036226&dib=eyJ2IjoiMSJ9.qBV7pK7LgLP4bGqwkMNUXRSFdreu-lStvmBIH2n9kMEAR_0CaaP_Yie-akgFz6KDbGtYLittN1V_-MvJrmFwAAU-iNVXEuqaIQMKNC1EnW0puZvunwXSlDsMUeWgYt5F8yUy85wheiYr9yiCFhsSU250c7lvfmNVwqDqMgCUn6lQ_kErhjURPZqB514JSP-OTBIPIXxFVtyXWHnRpqJCRg.XN-eWp57uehe_fFpErIbVIP_8-I6vuYqouRQ8suu7rA&dib_tag=se&hvadid=693121756056&hvdev=m&hvexpln=68&hvlocphy=9003834&hvnetw=g&hvocijid=13328800950396937948--&hvqmt=e&hvrand=13328800950396937948&hvtargid=kwd-37794862&hydadcr=14850_13479306&keywords=bathroom%2Bexhaust%2Bfan&mcid=a5bebc0bc1c83d55b404c0c91e5b3331&qid=1782429235&sr=8-1-spons&sp_csd=d2lkZ2V0TmFtZT1zcF9waG9uZV9zZWFyY2hfYXRm&th=1 You could also just get a fan, and point it upwards towards the vent, that will create ventilation. (But the fan in the vent itself much more efficient.) Bathrooms aren't the best place for purifiers as there is limited space, and you can't get them wet. So much better to do exhaust fan. (I was asking my landlord if they had one with grill before I moved in and I suspect they installed it as it's an upgrade they should have anyway. So now it's automatic as soon as I turn it on, as new buildings have. Older buildings will pretty much always at least have a vent though.) If you somehow have no vent, then a box fan will create more ventilation than a small purifier would, and you can put a carbon strip behind it, and/or some pellets. (Carbon/charcoal pellets.). Both can be bought for around 12 bucks. So a DIY option is likely better for you, if there is no vent.
