The Guardian Air QR+ In-Duct Air Purifier



Protect your spaces with the Guardian Air QR+ commercial in-duct air purification system.

The Guardian Air QR+ in-duct air purifier utilises RGF’s proprietary PHI-CELL® technology.

Installed into the supply plenum of your existing air conditioning or heating system air ducts, the Guardian Air QR+ in-duct air purifier produces low level, airborne hydrogen peroxide molecules that are distributed by the air handler, through the duct system and into the conditioned space.

Unlike passive air technologies, which need pollutants to pass through the unit for purification or filtration, the Guardian Air QR+ in-duct air purifier sweeps through the air conditioned space actively purifying pollutants at the source.


Ideal for use in:

  • Offices
  • Classrooms
  • Cafes & Restaurants
  • Restrooms
  • Locker rooms
  • Conference rooms
  • Aged Care
  • Childcare Centres
  • Pubs & Clubs
  • Studios & Gyms
  • Cinemas & Theatres
  • Hospitals & Surgeries
  • Museums
  • Sports halls
  • Churches
  • Lecture Theatres

Why Use RGF’s PHI-CELL® Technology?

Photohydroionization® (PHI) is an active air treatment technology. Active air treatment is the process of reducing air and surface contaminants by recreating safe, natural levels of hydrogen peroxide (H2O2) in occupied areas.

RGF’s patented PHI-CELL® technology combines a photocatalytic process and a multi-wavelength UV source to create active air purification. The combination of UV-C light and a hydrated quad-metallic catalyst drives a reaction that produces low level airborne H2O2.

RGF’s PHI-CELL® air treatment systems are operating safely in over four million installations globally.

  • Actively targets pollutants in the air
  • Retrofits to existing HVAC systems
  • Installed into the supply plenum
  • Operates silently and continuously
  • Quick & easy installation
  • Effective against viruses, bacteria, mould spores, odours and more
  • 1 Year Warranty
Model No. QRP
Technology PHI-CELL®
Cell Replacement Recommended after 2 – 2.5 years

Plate: 140mm (W/D)
• 5″ = 127mm (L)
• 9″ = 228mm (L)
• 14″ = 355,, (L)

Installation In-Duct
CFM’s 300 – 18,000 CFM
Material Aluminium / Polymers
Weight 1.36kg (5″ / 9″) – 1.81kg (14″)
Warranty 12 months


It's time to improve your indoor air quality.

PHI® Active Air Purification is the leading technology for clean, safe indoor air. Talk to us about installing the world's best-selling air purification technology in your home, business or facility.