Atomization uses a cold-air jet pump to force essential oil molecules through an atomizer and into very tiny particles we call a 'micro vapor' while preserving the natural healing qualities of the essential oil. These atomized molecules become a micro-fine vapor that float through the air and keep your environment therapeutically rich for extended periods of time. Atomizing is the most effective and therapeutic method of essential oil diffusion. Area coverage is about 800-1500 sq.ft.
Pros: Atomization is absolutely the best way to provide both aroma and therapeutic healing value with essential oils because it does not alter the chemical composition of the oils. It breaks down pure essential oil molecules without separation of the mixture and produces a particle size small enough for the lungs and body to absorb rapidly. HEO's Pro and Whisper diffusers are equipped with built-in timers and pressure output controls for full control over the oil consumption. In our experience, no method of diffusing is as effective in preserving the natural healing qualities of essential oils.
A study was conducted in 2016 where the Hopewell Pro model diffuser and an ultrasonic diffuser that uses water were diffused for 15 minutes. They were then turned off and the essential oil molecules in the air were measured. After 20 minutes the ultrasonic (water) diffuser molecules could not be measured. The molecules from the Pro remained in the air 75 minutes - nearly four times longer.
Cons: Units can be more expensive as it is more costly to create a steady pressurized air flow than to create heat or rotate a fan. Cold air jet technology is not silent. More oil is consumed (thus the advantage of using a diffuser with a timer).
Vaporization combines essential oils with water and a mist forms which fills the air. This mist is produced through ultrasonic waves assisted with a fan to force the mist into the environment.
Pros: Humidification alone has many benefits especially in dry climates. Also, the negative ions in the water vapor can help filter the air. Using vaporization with essential oils will produce a nice scent in an average-sized room. Some vaporizers are equipped with colorful lighting, music, a variety of timer options and are quiet. Essential oil usage is minimal.
Cons: Humidification can be undesirable in high-humidity climates. It is a less effective way to provide aromatherapy because the majority of the mist is water vapor which quickly drops from the air to the floor. Mist suspension time is short because water droplets are heavy. Water may also alter the purity of the essential oils. Area coverage is about 300-500 sq.ft. Most vaporizers will only run up to five hours on a single filling.
Fan / Ventilation
By utilizing a small fan to create airflow, evaporation is achieved when air passes over a wick or absorbent pad which holds the essential oil.
Pros: Ventilation offers an economical and simple way to provide evaporation. Since there is no heat involved, the chemical composition of the essential oil remains intact. Ventilation is a good way to scent a small room or car. Oil usage is minimal. Usually economically priced.
Cons: Aroma has limited reach. The minimal size and availability of breathable molecules provides less therapeutic benefits than those that are dispersed via micro mist.
By applying heat, either through burning a candle, or by electricity, the increased temperature will cause the essential oil to evaporate into the air releasing an aroma.
Pros: Heat will gently produce a scent and fill a room nicely with only a minimum amount of essential oil. Most are economically priced.
Cons: Heat tends to alter the chemical composition of the essential oil, which can alter its purity and compromise therapeutic value. Second, heat may not be therapeutically useful because the size and availability of breathable molecules are mostly filtered out by the nose hairs and nasal cavity.
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