A method and device for cleaning air. The air to be cleaned is directed as a continuous flow in succession through a) a first zone wherein the air is treated with ozone and possibly also water, ammonia or other aerosol growth promoters b) a second zone wherein the air is subjected to ultraviolet light c) a third zone wherein the air is maintained for a sufficient time to allow aerosol growth d) a fourth zone where particles in the air are given an electrical charge e) a fifth zone wherein the air is passed through an electrostatic filter and f) a sixth zone wherein the air flows over a catalyst to break down residual ozone. The air in confined spaces including indoor rooms, public vehicles with limited access to fresh air is subjected to a low energy consuming universal broad-spectrum removal of the various types of indoor air pollution including toxic gases, organic compounds, microorganisms and liquid and solid particles being hazardous to health and detrimental to quality of life. d) a fourth zone
