Ultrasonic oil diffusers have a membrane that breaks the molecules of the oil and the water through a quick vibration to create a vapour that will disperse essential oils across the room in small particles. When on, the diffusers can run from 5 to 10 hours (depending on the size, model and brand) and only require an electric source to plug them into. These are safer to use as there is no heating process that will alter the temperature of the oils and change their chemical composition, making them the best choice for aromatherapy purposes. Normally once the water runs out they will automatically shut off, making them safe for the whole family. Oil burners are a more budget-friendly option, and last depending how quickly the candle melts completely or it makes the water above it evaporate. The do change the temperature of the oil by heating the oils and losing some of its aromatherapy properties. However, they’re equally effective in spreading the oils’ aroma anywhere they’re placed and can create an atmosphere of calmness with the warm candle-light.