These units are easy to mount into domestic or commercial HVAC units and/or ductwork where indoor air quality and sick building syndrome problems originate. They can also be easily be fitted into any new or retrofitted into existing residential or commercial MVHR or PIV installations (where the unit is BBA certified or TUV Rheinland or similar tested). They use patented Photohydroionisation / REME technology, which significantly reduces odours, pollutants, VOCs, smoke, mould, bacteria and viruses in the indoor air and on surfaces. The units create an advanced oxidation plasma (AOP) comprising hydroperoxides, superoxide ions and hydroxide ions which occur naturally in the Earth’s atmosphere and are known as Mother Nature’s natural, enviro-friendly cleaning agents. The AOP is enriched onto the airstream and distributed throughout the entire property breaking down and destroying organic pollutants everywhere on contact thus purifying all the air and surfaces in the property at the same time. Further, the REME technology charges the plasma which induces particles to coagulate or stick together making them bigger and easier for any filtration processes to catch. Compared to traditional passive technologies which only purify the air inside a chamber which can be re-contaminated as soon as it leaves the unit, this integrated technology is far more strategically effective.