Where should the 2V Sub‑HEPA Filter be installed on equipment?

The 2V Sub‑HEPA Filter follows clear installation rules. The core principle is mounting at the mid‑to‑rear filtering section: downstream of coarse pre‑filtration, upstream of high‑efficiency final filtration and close to clean‑air outlets. Direct installation at the foremost air‑intake position is prohibited. Proper placement is critical for purification performance, service‑life extension and maintenance‑cost reduction. Exact mounting locations vary depending on the matched‑equipment type.
For large modular air‑handling units and central‑air‑conditioner purification assemblies with multi‑stage‑filtering layouts, air flows sequentially through the air intake, pre‑filter compartment, medium‑efficiency filter compartment, sub‑HEPA filter compartment, HEPA filter compartment and air outlet. The 2V Sub‑HEPA Filter must be fitted in the dedicated intermediate compartment behind medium‑efficiency filters and ahead of HEPA filters. In this configuration, pre‑filters trap large‑size dust, hair and fibrous debris, while medium‑efficiency filters capture medium‑sized particulates. Coarse contaminants are prevented from clogging the sub‑HEPA filter, allowing the 2V Sub‑HEPA Filter to focus on fine‑particle removal and maximize its precision‑filtering advantages.
For fresh‑air systems and ducted fresh‑air hardware, install the filter in intermediate purification modules of main ductwork. Do not place it at outdoor air‑intake ports. It belongs inside indoor‑side duct segments, downstream of blowers and upstream of air outlets, within dedicated purification chambers. Out‑door incoming air first passes upstream coarse filters to remove sand, debris and large dust particles. Fine‑contaminant removal is then performed by the 2V Sub‑HEPA Filter before clean air is supplied indoors. This configuration protects filter media from direct erosion by harsh outdoor air and reduces wear‑and‑tear.
For terminal clean‑air devices such as clean benches and clean‑booth compact purification units, install the 2V Sub‑HEPA Filter between blowers and air outlets as a pre‑terminal filtering stage. Blowers draw ambient air through built‑in upstream coarse filters. Air then undergoes deep purification by the 2V Sub‑HEPA Filter before clean air discharges from outlets. Local clean‑air conditions inside benches or clean booths are secured for precision handling and laboratory testing.
For small terminal hardware including fan‑coil units and ceiling‑mounted integrated purification units, fit the filter in rear built‑in filter slots located between blower impellers and outlet grilles. It serves as the final purification barrier to remove fine contaminants from recirculated air and improve indoor circulating‑air quality.
Installation positions to be strictly avoided include foremost air‑intake openings and direct air passages without upstream pre‑filtration. Such locations expose filters to heavy contaminant loads, cause rapid clogging, demand frequent replacement and raise overall operating expenses. Mounting right at the outermost outlet face is also discouraged, because the filter will become vulnerable to contamination from indoor return‑air flow and surrounding debris. Following mid‑to‑rear installation guidelines guarantees optimal purification results, extends filter service cycles, cuts system‑maintenance expenditure and supports stable long‑term performance for ventilation‑purification installations.