1) A whole house "filter" attached to your furnace (typically expensive initially and on-going)
2) An ecoquest product like the Fresh Air (will do up to 3000 sqft) Realistically you will want 2 or 3 of these depending on your home. You can locate these stratigically
3) There are special UV units for the whole home installed in the ductwork. They will not help with dust or particles though.