Our apartment's air return is being a door. Currently it has a MERV-1 filter. Is it worth getting a better filter for allergies, or does this setup reduce the amount of particles
Nordic Pure 20 in. x 25 in. x 2 in. Allergen Pleated Furnace Air Filter MERV 12 (3-Pack) 20x25x2M12-3 - The Home Depot