This 600 won’t remove half of what the 1,000 micron unit will and nowhere near a third of what the 1,900 micron filter will do. Your only choice here is to keep the house as clean as possible to reduce the load on the filter system itself (The cleaner the house.. shoes off in the mud room, dogs and cats brushed outside etc..) youll give this economy filter a fighting chance. It’s defiantly a filter you’ll have to change more often to keep the particulate mater being circulated down, but at $15 it’s an affordable unit that won’t break the bank every year just on filters as you certainly will if you were to swap out the 1,900 micron filter every two to three months. Regardless, if you keep the ductwork clean and keep a cleaner household, this economy filter can get the job done, and once a year you can splurge on the 1,900 micron during allergy season.