PLASMA QUAD is an active air filtration system developed by Mitsubishi Electric to abate indoor airborne pollutants. 

The filtration eliminates 99% of airborne viruses, bacteria and moulds, 98% of allergens (such as pollen), 97% of mites and dust and 99% of suspended particulate matter (PM2.5), and also traps and neutralises odours. 

The PLASMA QUAD filter acts as an electric barrier which captures and neutralises microscopic airborne particles. By generating and then discharging a high voltage electrical field, this technology captures and inactivates viruses and removes other contaminants passing through the filter.

Tests conducted by the Microbial Testing laboratory Kobe Testing Center of the QTEC – Japan Textile products Quality and Technology Center have demonstrated that PLASMA QUAD is capable of successfully inactivating up to 99.8% of the Covid–19 virus (SARS-CoV-2). 

This test was conducted in the laboratory using the PLASMA QUAD air filtration system. The results effectively attainable in real world usage with a product equipped with PLASMA QUAD may differ from test results.

MSZ-LN series has PLASMA QUAD PLUS filter incorporated inside the air conditioner.  

This way the installation of an exterior unit is eleminated.