The best air purifier is a $20 Lasco box fan with a 3M square furnace filter duct taped to it.
You can vary the cost and filtration ability based on the filter. A super duper filter is like $35, and a midrange is about $20.
You can vary the cost and filtration ability based on the filter. A super duper filter is like $35, and a midrange is about $20.
That said, it's very loud even at the lowest setting. It's not something you want to share a room with. I use my home automation stuff to only run it when required, based on a motion detector at the litter boxes.