Most consumer reviews for Bionaire brand air purifiers from Amazon and Best Buy, as of 2015, indicate that the models are efficient and compact. Many comment about the noise of the units.
The Bionaire BAP825WO-U Tower Air Purifier received 3.8 stars out of a potential 5 stars from 13 Amazon customers. Reviews were mixed as to the loudness of the tower unit, with some reviews calling it quiet and others deeming it noisy. Most reviews agreed that the model is efficient and convenient for its compact size.
The Bionaire BAP600-U Egg Air Purifier received an average of 4.3 stars out of a potential 5 stars from 38 Best Buy customer reviews. Best Buy consumers generally find the egg model to work well. Reviews indicate it's a good unit for the price, and most would recommend it to a friend. Several reviews mention the white noise or the quiet hum if the unit is set to low.