A HEAT CAPACITOR FOR A CAPILLARY AEROSOL GENERATOR COMPRISES A PHASE CHANGE MATERIAL 40 THAT CHANGES PHASES AT A TEMPERATURE APPROXIMATELY EQUAL TO A TEMPERATURE SUFFICIENT TO VOLATILIZE LIQUID MATERIAL IN A CAPILLARY PASSAGE 10 OF THE CAPILLARY AEROSOL GENERATOR. THE PHASE CHANGE MATERIAL STORES HEAT, WHICH CAN BE USED TO GENERATE AEROSOL EITHER CONTINUOUSLY OR INTERMITTENTLY OVER A GIVEN TIME. THE USE OF STORED HEAT IN THE PHASE CHANGE MATERIAL TO GENERATE AEROSOL OVER TIME ENABLES OPERATION OF THE CAPILLARY AEROSOL GENERATOR REMOTE FROM A LARGE ENERGY SOURCE. A CAPILLARY AEROSOL GENERATOR AND A METHOD FOR GENERATING AEROSOL ARE ALSO DISCLOSED. SOLE FIGURE