Green technology for producing negative oxygen ions
No ozone emission or high-voltage static discharge
Produces fine negative oxygen ions that are easily inhaled and efficiently absorbed by the body
Recreates the refreshing negative ion environment found in forests and waterfalls
Equipped with a HEPA 14 filter that meets EN 1822 standards
Others
Uses high-voltage ionization to generate negative oxygen ions
Produces ozone and high-voltage static electricity as secondary byproducts
Generates larger negative oxygen ion particles that are less readily absorbed by the body
Excessive ion concentration may cause respiratory irritation
Filter compliance is unclear; typically HEPA 13 or lower




