Installation is easy, just follow the steps:

• place the bottom plate on a flat surface
• Insert the four HEPA filters into the bottom plate so they interlock into a square. Ensure the black steel mesh faces outward.
• Unroll the entire Velcro strap and wrap it around the outside perimeter of the filter cube; fasten the strap to itself. Ensure there are no gaps between the filters to prevent "air bypass" (unfiltered air escaping).
• Lower the fan+lid module evenly, pressing down on opposite corners to keep the top square. A snug fit is intentional to limit air bypass.
• Connect the DC plug to the power adapter and plug into mains.
• Maintain at least 15 in / 38 cm clearance on all sides for intake airflow.

Operation is minimal, just use the rotary voltage controller on the power lead. Turning the knob clockwise increases voltage, airflow and noise; turning it counter-clockwise reduces airflow and eventually powers the unit off. You can adjust the rotating speed / airflow / sound noise according to your needs.

The device uses negative pressure. The four fans exhaust air upwards, creating a vacuum that pulls air through all four HEPA filters simultaneously. This 360-degree intake, combined with high-airflow fans, allows for its massive cleaning capacity. The only replacement parts are the included filters which can only be bought from Airfanta.

There are two versions available:

• Stock (H11 HEPA) with price of €49,95 EUR from official website / amazon.com

• HEPA & Activated Carbon filter for €64,95 EUR from official website / amazon.com

Filter replacement frequency is driven by three main variables: (1) ambient particulate load (PM), (2) room size and natural air exchange (leakage/ventilation through windows and doors), and (3) runtime and operating speed/voltage (how much air is pushed through the filter media).

As practical guidance, in environments averaging PM2.5 ≈ 10 µg/m³, filters typically last around 9 months. In heavy-smoke or wildfire conditions around PM2.5 ≈ 90 µg/m³, replacement may be needed as frequently as monthly. Regardless of conditions, replacing at least once per year is recommended as a baseline maintenance interval. Depending your enviroment, the filter cost can change up or down according to the following table: