UV Ozone is the most reliable and effective units available. They are a sealed preasure UV tube useing the light spectrum to convert oxygen to ozone. UV ozone smells the best.
Corona discharge ozone is higher maintenance and the ozone output lowers as the moisture in the feed stock air increases. The cleaning is increased with increased moisture. corona ozone smells second best.
Corona ozone will damage plants sooner than UV because the nitric acid/oxide it produces as a small by product.
Ozone is also used form decontaminating rooms/buildings/homes and offices from mold spores, bacteria and viruses via a shock treatment when the room is empty. It is used in crime scene cleanup and many other applications for decontamination purposes.
Ozone gas injected in the input of the carbon will oxidize the organic vapour trapped by the carbon filter and extend it's life between 5x or 50x . The carbon is a catalyst for ozone reactions with organic gases and the result is enhanced deodorization and remediation of the carbon filter all in one step. The ozone will slowly reduce the carbon in the filter pack but not as quick as the filter becomes full and needs to be replaced.
Ozone can be used to9 remediate the carbon filters frequently or it can be injected to constantly maintane the carbon.