When used as directed, the ambient scent or aroma effect from the Aera diffuser is safe for continuous inhalation. The Monell Chemical Senses Center in Philadelphia, USA just reported the results of a 3-year human trial to answer the question, “Does exposure to continuous indoor fragrance result in an acute impact on health?” The answer is NO. The trial was done with a Prolitec commercial device using the same technology as Aera.
Concerns have been raised that essential oils (also known as naturals) may be harmful to pets. While there is no scientific evidence to support this, as pet owners we take the assertion seriously. The ultra-low trace quantity in the ambient air should not be harmful to pets. If there is concern, a veterinarian should be consulted.
You might also be interested in this link to an article the ASPCA wrote about pets and essential oil diffusers:
Directions for proper use:
Aera creates a hypoallergenic ambient scent effect using only trace quantities of fragrance oil in the air. However, concentrations are much higher within 12 inches of the fragrance oil output hole on the capsule during operation.
Keep noses of all kinds at least 12 inches away from the diffuser when in operation.
Keep out of reach of pets and children at all times.
Use only as directed.
You can find more information on Aera health and safety here.