Electronically enhanced air cleaner with multiple filters and energy grids

A method of filtering air, the method comprising:

• in a housing that defines a first pathway for air to pass from outside the housing and through a first plurality of filters, and that defines a second pathway for air to pass from outside the housing and through a second plurality of filters, wherein each of the first plurality of filters and the second plurality of filters includes a prefilter and an electrically enhanced filter, the electrically enhanced filter including a high-voltage conductor, a ground grid and filter media disposed between the high-voltage conductor and the ground grid, applying a high-voltage potential to high-voltage conductor of each of the plurality of filters to create a first electric field between the high-voltage conductor and the ground grid in each of the plurality of filters;
• and
• drawing air from outside the housing along the first and second pathways.