EnglishCurrent
德语
阿拉伯语
法语
印尼语
日语
韩语
马来语
葡萄牙语
俄语
西班牙语
泰语
土耳其语
越南语
Cleanroom HVAC and Air Handling Equipment
Dedicated Outdoor Air System
A ventilation air system that independently controls outdoor-air moisture and temperature before delivering a measured dry-air quantity to clean spaces.
- Independent Latent Control
- Measured Ventilation Air
- Energy-Recovery Ready
- Stable Dry Supply Air
Product Introduction
A dedicated outdoor air system separates ventilation and latent treatment from the high recirculation airflow used for cleanroom particle control. It receives 100% outdoor air, recovers useful energy from a separated exhaust stream where appropriate, cools and dries the air, then reheats it to a neutral or designed supply condition. This division lets terminal recirculation units handle sensible load and filtration without relying on them to remove the full outdoor-air moisture load. Airflow, dew point and supply temperature can be monitored independently.
Key Features
Deep dehumidification establishes a predictable supply dew point across seasonal outdoor conditions.
Plate, run-around or carefully selected rotary recovery can reduce outdoor-air heating and cooling load.
Reheat prevents overcooled ventilation air from causing local discomfort or excess sensible cooling.
Customer Product Concerns
When ventilation air and recirculation air are treated together, moisture control can drift as outdoor conditions and room sensible loads change independently.
The cleanroom becomes humid at low sensible load even though space temperature is stable.The DOAS controls outdoor-air dew point separately from room recirculation cooling.
Ventilation quantity is inferred from a damper position rather than measured.An airflow station and fan control maintain the scheduled outdoor-air volume.
Energy recovery risks transferring contaminants from exhaust to supply.A separated plate or run-around system is selected where cross-stream leakage cannot be accepted.
Cold dry ventilation air overcools perimeter or low-load rooms.Modulating reheat delivers a neutral or scheduled supply-air temperature after dehumidification.
Typical Applications
Pharmaceutical cleanroom ventilationLaboratory outdoor-air systemsMedical and research facilitiesHigh-humidity industrial locationsHealthcare clean zones
Technical Parameters
Typical double-skin construction for a cleanroom dedicated outdoor air system is listed below.
| Core Material | Closed-cell polyurethane insulation in thermally separated double-skin panels |
|---|---|
| Panel Thickness | 50–70 mm insulated casing |
| Effective Width | 1000–3400 mm nominal casing width |
| Maximum Length | Up to 12000 mm including recovery, coil, reheat and fan modules |
| Steel Facing Thickness | 0.6–1.0 mm outer skin and 0.8–1.0 mm wet-section lining |
| Core Density | 40–45 kg/m³ closed-cell polyurethane |
| Thermal Conductivity | 0.022–0.026 W/(m·K) for the casing insulation |
| Surface Finish | Powder-coated exterior with cleanable galvanized or stainless inner surfaces |
| Joint Type | Compression-gasketed thermal-break panels with isolated supply and exhaust air paths |
| Customization | Available based on the intended application and operating environment. |
Available Options
Plate, rotary or run-around heat recoveryChilled-water, DX or heat-pump dehumidificationHot-gas, water or electric reheatSteam or adiabatic winter humidification
Planning a Dedicated Outdoor Air System specification?
Send us your dimensions, installation conditions, performance targets and required surface finish.
