electric vaporisersELECTRIC OIL BURNERS Electric oil burners come in many shapes and sizes and are avaliable from Powells Aromatherapy. A few drops of essential oil are put onto the hard plastic surface of the diffuser and gently heated by and electric element. Depending on the type of model chosen, water is usually not always necessary, though some electric vaporizers are designed to use a little water if desired. Essential oils usually do smell better when mixed with water, and the water itself humidifies over-heated or air conditioned rooms. Advantages: A number of electric diffusers have a variety of settings to adjust the rate of evaporation. Unlike naked oil burners, electric diffusers are suitable for the office and for overnight use, especially in children\'s bedrooms, as they can be left unattended.