How Airfree Air Purifiers Work

The heart of every Airfree sterilizer is its patented Thermodynamic Sterilizing System (TSS), a ceramic core which incinerates contaminants at a temperature of roughly 400ºF (250ºC).

When the unit is turned on, the ceramic core of the TSS begins to heat the air inside the numerous vertically-oriented sterilization chambers which appear as a bundle of ceramic tubes. As the temperature of the air inside the chambers begins to increase, the air naturally begins to rise due to heat convection (hot air rises). This draws contaminated air from the room into the bottom of the Airfree sterilizer. The process of convection will continue to circulate air until the unit is turned off. Since the Airfree relies solely on convection for air movement through the system it does not require noisy fan, making it ideal for use in bedrooms. According to the Swedish National Testing and Research Institute, the Airfree P1000 air sterilizer treats approximately 14 cubic meters of air per hour (495 cubic feet per hour). This is enough to treat all of the air in a average bedroom about once ever 2 to 3 hours.

99.99% of bacteria, viruses, and mold spores are immediately killed by the high temperature in the ceramic core. Mold reduction in the atmosphere causes a reduction in the mold dependant dust mite population. Airfree also destroys the harmful toxins and fungus freed by dust mite feces that trigger respiratory allergies. The reduction in mold spores has the effective of reducing dust mites as well since there is a reduction in food source for them to survive. Depending on the size of the room, the level of contaminants present, and the natural rate of air turnover in the room, it may take up to 10 days to achieve 70-90% contaminant reduction with an Airfree sterilizer, however, once this level of treatment is reached, it is generally easy to maintain.

Once the purified air passes out of the ceramic core, it is cooled and delivered to the room with very little or no effect on ambient room temperature or humidity.

Since the Airfree processes air at a slower rate than traditional HEPA air filters due to the fact that it relies only on convection to move the air, it will take a longer-time to achieve contaminant reduction. For this reason, the Airfree is often used in conjunction with a HEPA filter; the Airfree is used to control bacteria and viruses, and the HEPA filter is used to control particulate and heavier allergens that are not as easily drawn into the Airfree's sterilization chambers through simple convection alone.

The Airfee sterilizer is normally placed on the floor (hard surfaces only) or on a low-lying coffee or end table close to the floor level. It should be placed in a location that is not immediately adjacent to furniture, curtains, a door, a window, or an air vent that could disrupt the air movement through the unit. It is recommended the minimum room size be approximately 50 square feet (based on an 8 foot ceiling).