Fresh-air systems only treat make-up air. Corrosive gases entering through doors, cable penetrations, or equipment seals linger in server rooms, continuing circuit degradation.
YONGFAN CA and DBS units continuously polish indoor air, removing H₂S, SO₂, Cl₂, NOx, and formaldehyde via plug-in MediaPAK PK-12 modules or deep-bed top-fill designs.
Corrosive gas enters every time personnel enter. Outdoor-only systems never scrub the trapped indoor air surrounding active servers.
Pure recirculation units do not bring outdoor air in. Positive room pressure requires fresh-air make-up (PSA) or DBS in positive-pressure mode.
High-airflow blowers placed in occupied control rooms generate intrusive noise. CA uses acoustic lining and VFD control to remain below 65 dB.
Refilling loose media inside live data centers creates dust risk. CA uses pre-packed, rail-mounted MediaPAK PK-12 slide-in cartridges.
The CA Series is a dedicated in-room air purification unit designed for server rooms, computer centers, and archives. Drawing room air through grilles, it passes air through G4 pre-filters, rail-mounted MediaPAK PK-12 modules (324 Pa), and F8 post-filters before returning clean Class G1 air.
The DBS Series is an indoor or corridor-mounted unit that operates in either positive-pressure supply mode or recirculation mode. It uses flanged duct connections and a top-fill / bottom-discharge bulk chemical bed, providing 249 Pa available ESP with <1% casing leakage at 1,000 Pa.
| Feature | CA Indoor Recirculation Unit | DBS Chemical Filtration Unit |
|---|---|---|
| Primary Role | Dedicated room recirculation air polishing | Positive-pressure fresh air supply OR recirculation |
| Documented Airflow | 850 to 6,800 m³/h (4 standard models) | Project-engineered per quotation |
| Media Format | Pre-packed MediaPAK PK-12 slide-in modules | Top-fill / bottom-discharge bulk media bed |
| Pressure Capability | 25 Pa ESP (free-room return/supply grilles) | 249 Pa ESP (ducted room/cabinet delivery) |
| Control Interface | Integrated VFD + LCD panel | Direct / DCS status integration |
| Best Application | Live server rooms, control rooms with existing fresh air | Equipment corridors, cabinet pressurization, compact AHUs |
Provide length, width, and ceiling height of the protected room.
Identify target contaminants (H₂S, SO₂, NOx, VOCs, formaldehyde).
Confirm if positive pressure is existing or required from this unit.
Choose slide-in MediaPAK cartridges (CA) or bulk refill (DBS).
YONGFAN engineers will calculate room air-change rates and recommend the optimal media formulation.
MediaPAK guide rails and module perimeter seals are checked to ensure 100% of air passes through chemical granules.
Internal blowers and acoustic insulation are checked across full VFD speeds to guarantee quiet operation in server rooms.
DBS casings undergo pressure testing against 2,000 Pa structural and <1% leakage benchmarks at 1,000 Pa.
Chemical media is tested for active KOH / NaMnO₄ percentage and flame retardancy per UL 900 standards.
The CA Indoor Recirculation Chemical Filtration Unit is specifically designed to polish air already inside the protected room.
Choose DBS when positive-pressure filtered make-up air is required in addition to chemical filtration, or when ducted connections are needed.
No. CA is a pure recirculation unit. Pair it with PSA or a positive-pressure DBS configuration when fresh outdoor air is required.
It is the pre-filled, rail-mounted chemical-media module used in CA units, replaced as a complete cartridge to eliminate in-room dust.
PK12-CPB (sodium permanganate / KMnO₄) targets NOx, NO₂, formaldehyde, and trichloroethane alongside acid gases.
Yes. CA includes a built-in VFD and LCD control, allowing airflow to be matched to room volume and measured gas load.
For large outdoor fresh-air make-up systems, select PSA or PSA-PG.
CA and DBS are indoor room units. For contaminated exhaust discharge to the atmosphere, select WGP Series.
CA operates within closed room boundaries; it cannot create positive room overpressure without fresh-air units.
Media replacement intervals depend on continuous infiltration rates and door traffic, not room square footage alone.
Send your room volume, gas exposure risks, and layout constraints. YONGFAN engineers will calculate air-change rates, select the optimal PK-12 media formulation, and provide dimensional submittals.
