Abstract: Petroleum solvent vapors which discharge from a dry cleaning dryer in a heated gaseous mixture of vapors and air are condensed and recovered, and heat energy is recovered for productive use elsewhere. The gaseous mixture of vapors and air is sprayed with relatively cool water to condense the solvent vapors. The resulting liquid mixture of water and solvent is withdrawn from the spray chamber and is subjected to gravitational separation. Water reclaimed in the separation process is reused in the spray chamber. Recovered solvent is reused in a dry cleaning washer. The gravitational separation process is preferably carried out in a series of gravitational separators, and heat is withdrawn from at least one of the separation units for productive use in a heat consuming device.