If your home has ductwork, you can add a hepa filter to the circulation system. Mine uses a deeply-pleated material that must be 40+ sq.ft. feet in area, on an

If your home has ductwork, you can add a hepa filter to the circulation system. Mine uses a deeply-pleated material that must be 40+ sq.ft. feet in area, on an always-on blower system. I change the filter yearly, should change it more often.