| Brand | RGF |
| Type | PHI |
| Model | QRP-5 |
| MPN | QRP-5, QRP5 |
| Filtration Technology | PHI |
The Guardian Air QR+ units are easily mounted into air conditioning and heating systems air ducts where most sick building problems start. When the HVAC system is in operation the Guardian Air QR+ unit creates an Advanced Oxidation Process consisting of: hydro-peroxides, super oxide ions and hydroxide ions.