<p>A power management system for providing power to a heater (22) in order to vapourize a chemical formulation into surrounding atmosphere having pulse generation means for supplying pulses of energy, switch means (14) connected to the pulse generation means and the heater (22). The switch means (14) receives the pulses of energy from the pulse generation means and delivers amplified pulses of energy to the heater (22) at a rate controlled by the pulse generation means in order to sufficiently heat the heater (22) to vapourize the chemical formulation.</p>
