Ebac DD900 10521GR-US Desiccant Dehumidifier 460V 3ph – 364 PPD, -4°F, 198 lbs
Ebac DD900 Desiccant Dehumidifier – Model 10521GR-US (460V, 3-Phase)
The Ebac DD900 (10521GR-US) is a 364 PPD industrial desiccant dehumidifier operating on 460V, 3-phase, 60 Hz at 13A and 9.8 kW. Using a washable PPS rotor with 82% active silica gel, it moves 530 CFM of process air and 147 CFM of regeneration air through 5" and 4" duct connections. Operating range spans -4°F to 104°F — eliminating the low-temperature performance cliff of refrigerant dehumidifiers. Stainless steel construction and integrated ammeter/hour meter complete a unit designed for long-term unattended industrial service.
DD900 10521GR-US – Key Specifications and Features
- Model: 10521GR-US (DD900, 460V 3-phase)
- Extraction rate: 364 PPD (typical conditions)
- Process airflow: 530 CFM, 5" duct connection
- Regen airflow: 147 CFM, 4" duct connection
- Electrical: 460V, 3-phase, 60 Hz, 13A, 9.8 kW
- Operating temperature: -4°F to 104°F
- Rotor: washable PPS with 82% active silica gel
- Construction: stainless steel
- Control: auto/manual with remote humidistat connection
- Monitoring: integrated ammeter and hour meter
- Dimensions: 28" W × 23" D × 48" H
- Weight: 198 lbs
Where the Ebac DD900 Performs
Cold storage facilities running at or near freezing use the DD900 because refrigerant dehumidifiers lose efficiency below 50°F and stop functioning entirely below 33°F — the DD900 operates to -4°F without performance loss. Pharmaceutical and electronics manufacturers use it to hold ultra-low relative humidity levels that refrigerant units cannot maintain, since desiccant adsorption works independently of ambient temperature. Marine and offshore installations specify stainless steel desiccant units like the DD900 for corrosion resistance in saltwater-adjacent environments. The 460V, 3-phase electrical specification matches the power distribution standard in most manufacturing and industrial facilities, eliminating the need for step-down transformers.
Desiccant Technology vs. Refrigerant at Low Temperature
The DD900's silica gel rotor adsorbs moisture from process air and releases it into a heated regeneration airstream — a thermally driven cycle that functions regardless of ambient temperature. In contrast, refrigerant dehumidifiers require the ambient air to be warm enough to condense on cold coils, which fails below approximately 50°F. The DD900's -4°F minimum rating is a published operating floor, not a degraded-performance threshold. The 82% active silica gel content in the PPS rotor is a material specification that directly affects adsorption capacity; higher silica content means higher extraction per unit of rotor volume.
| Model | 10521GR-US |
| Extraction Rate | 364 PPD |
| Process Airflow | 530 CFM |
| Regen Airflow | 147 CFM |
| Electrical | 460V, 3-phase, 13A, 9.8 kW |
| Min Operating Temp | -4°F |
| Max Operating Temp | 104°F |
| Noise Level | 67 dBA |
| Dimensions | 28" W × 23" D × 48" H |
| Weight | 198 lbs |