The feasibility of condensation for gas-to-particle conversion of heavy metal vapors from combustion sources as a control strategy was investigated by a model study using lead oxide (PbO) as the heavy metal species. Gas-to-particle conversion and particle growth by condensation were simulated using a computer program, CONDCAPT. The maximum saturation ratio of lead oxide was found for different concentrations of a monodisperse population of 1 mu m diameter spherical sorbent particles. The maximum PbO vapor saturation ratio (S-max) attained was dependent on the aerosol concentration and the rate of decrease of hue gas temperature. Log-normal particle size distributions with one as well as two size modes were considered. The CONDCAPT simulation results were compared with results from another simulation (MAEROS2) that included coagulation as well as condensation as the particle growth mechanisms. The significance of the Kelvin effect was evaluated by comparing the CONDCAPT results with and without the Kelvin effect. An example case of a typical 100 Tons Per Day (TPD) capacity municipal waste incinerator was considered to assess the practical implications of the model results.