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Ebac DD900 10521GR-US Desiccant Dehumidifier 460V 3ph – 364 PPD, -4°F, 198 lbs
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Ebac DD900 10521GR-US Desiccant Dehumidifier 460V 3ph – 364 PPD, -4°F, 198 lbs
Ebac DD900 10521GR-US Desiccant Dehumidifier 460V 3ph – 364 PPD, -4°F, 198 lbs
Ebac DD900 10521GR-US Desiccant Dehumidifier 460V 3ph – 364 PPD, -4°F, 198 lbs
Ebac DD900 10521GR-US Desiccant Dehumidifier 460V 3ph – 364 PPD, -4°F, 198 lbs

Ebac DD900 10521GR-US Desiccant Dehumidifier 460V 3ph – 364 PPD, -4°F, 198 lbs

Brand: EbacSKU: DD900In Stock – Ready to Ship
$15,800.00
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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

Documents

DD900 Wiring Diagram (PDF)

DD900 Wiring Schematic (PDF)

Spec Sheet

Manual

TypeDesiccant
Capacity364 PPD
Airflow530 CFM
Voltage460V

Product Warranty Information

"1 Year"

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Frequently Asked Questions

What is the extraction rate of the Ebac DD900 10521GR-US?
The DD900 10521GR-US extracts 364 PPD under typical desiccant operating conditions. Unlike refrigerant dehumidifiers that publish AHAM ratings (80°F/60% RH), desiccant extraction rates vary with both temperature and humidity — performance at low temperatures is maintained while refrigerant units degrade.
What is the minimum operating temperature of the Ebac DD900?
The DD900 operates down to -4°F. This is a published operating floor, not a degraded-performance threshold — desiccant adsorption continues independently of ambient temperature, unlike refrigerant dehumidifiers which fail below approximately 33°F.
What are the electrical requirements for the DD900 10521GR-US?
The 10521GR-US requires 460V, 3-phase, 60 Hz at 13A (9.8 kW). This matches standard industrial 460V 3-phase distribution found in manufacturing facilities and industrial buildings, eliminating transformer requirements.
What is the process airflow and duct size for the DD900?
The DD900 moves 530 CFM of process air through a 5" duct connection, and 147 CFM of regeneration air through a 4" duct. Duct sizing is published in the spec sheet for HVAC system integration.
How does desiccant technology differ from LGR or conventional refrigerant dehumidification?
Desiccant dehumidifiers use a silica gel rotor to adsorb moisture thermally, with no compressor or refrigerant circuit. They operate at any temperature including sub-zero, achieve very low dewpoints, and handle high-moisture industrial environments. LGR and conventional refrigerant units work well above 50°F but lose capacity and eventually fail in cold conditions.
What does the washable PPS rotor with 82% active silica gel mean?
The PPS (polyphenylene sulfide) rotor material is chemical-resistant and washable for maintenance. The 82% active silica gel content is a material density specification — higher silica content means more adsorption sites per unit of rotor volume, directly affecting extraction capacity and efficiency.

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