The Helios Fans KWL-UVR is a replacement UV‑C tube intended for use with the HygroBox KWL HB system. This UV‑C lamp plays a crucial role in maintaining the hygienic performance of the unit by neutralizing airborne contaminants and preventing bacterial growth within the humidification system. Regular replacement of the UV‑C tube ensures continuous air sanitation and optimal operation of the KWL HB unit.