DP -70°C
Desiccant Dehumidifier
DHU series rotary desiccant dehumidifiers deliver stable ultra-low dew point air where refrigeration systems reach thermal limits.
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TeslaNorthvoltCATLATLBYDEVE EnergyFarasisEnvisionSVOLTTTI
TeslaNorthvoltCATLATLBYDEVE EnergyFarasisEnvisionSVOLTTTI
Featured Equipment
High-Performance Air Treatment Systems (Banner Showcase)
Direct supply from China's leading OEM/EPC contractor for ultra-low dew point air handling, solvent purification, and industrial cleanrooms.
DP -70°C
Turnkey EPC
Turn-key Dry Room System
Complete envelope, air balance, ducting, and low dew-point dehumidification delivered under one single-source contract.
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Recovery ≥99%
NMP Recovery System
High-efficiency solvent condensation that recovers over 99% of N-Methyl-2-pyrrolidone from electrode drying exhausts.
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Cooling + RTO
VOC Abatement System
Deep-cooling condensation coupled with Regenerative Thermal Oxidation (RTO) to neutralize hazardous volatile organic gases.
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Energy Efficient
Refrigerative Dehumidifier
Cost-effective ambient moisture pre-treatment for industrial packaging, warehouses, and clean room makeup air systems.
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Custom Built
Low Dew Point AHU
Precision-engineered air handling units integrating direct expansion, chilled water cooling, and silica gel/molecular sieve rotors.
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Petro-Grade
Oil Gas Recovery Unit
Engineered for fuel handling and chemical logistics, recovering valuable vapors while keeping operations within ATEX standards.
System Details
Continuous -70°C
Continuous Dual-Rotor Unit
Two-stage cascading sorption system that guarantees unbroken delivery of sub-zero dew points under high ambient latent loads.
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Macro Strategic Outlook
Global Procurement Demands for Industrial Dehumidifier AHUs
How the worldwide expansion of electric vehicle manufacturing, sterile pharmaceuticals, and military logistics is reshaping humidity control parameters.
Gigafactory Battery Manufacturing
Next-gen cell production (NCM, LFP, solid-state) demands dry rooms operating at -40°C to -70°C dew point. Even trace moisture (>10 ppm) triggers hydrofluoric acid (HF) generation during electrolyte filling, severely compromising cell capacity, cycle life, and thermal safety.
ESG & Life-Cycle Energy Optimization
Dehumidification comprises up to 40% of the operational energy consumption in a typical battery dry room. Leading multinational procurers now require thermal wheel heat-recovery, low-temperature waste heat desorbing, and variable air volume controls to hit Net-Zero goals.
Regulatory Certification Readiness
Exporting equipment across North America, Europe, and the EAEU requires flawless adherence to UL 1995, CSA, CE (Machinery & Low Voltage Directives), ASME pressure vessel codes, and EAC certification, eliminating commissioning friction in overseas cleanrooms.
Comprehensive Integration
Macro Industry Solutions: Engineering Where Failure Is Not an Option
Tailored psychrometric and environmental architectures engineered specifically around your production chemistry and moisture tolerances.
Lithium-Ion & Solid-State Batteries
Moisture reacts with electrolyte to form toxic HF. Our complete dry rooms protect electrode coating, winding, assembly, and electrolyte injection zones with continuously monitored -40°C to -70°C dew point air delivery.
Pharmaceuticals & GMP Cleanrooms
Hygroscopic compounds, effervescent powders, and soft gelatin capsules require strictly stabilized 10%–25% RH levels. We prevent product agglomeration, bacterial growth, and casing degradation during blister packaging.
Military, Aerospace & Defense
Compliant with the stringent GJB national military standard, our environmental air handlers safeguard long-term weapon arsenals, rocket propellant storage, radar electronics, and guidance avionics against corrosion.
Chemical & Petrochemical Plants
Integrated oil gas condensation recovery and regenerative thermal abatement system units that capture hazardous volatile emissions at fuel tank transfer hubs, stripping hydrocarbon fumes cleanly before release.
Semiconductors & Precision Optics
Precision dew point and particulate elimination across photolithography clusters, OLED display lamination bays, and precision wafer fab staging, suppressing electrostatic micro-discharges and oxidation.
Industrial Cold Chain & Ice-Free Logistics
Elimination of frost accumulation inside automated high-bay deep freeze warehouses and loading docks. Desiccant air drying removes airborne water vapor at doorways, eliminating slip hazards and sensor icing.
Authority Dehumidifier AHU Supplier
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Low Dew Point Engineering, Proven at Gigafactory Scale
Hangzhou DryAir Treatment Co., Ltd. has led industrial rotary desiccant dehumidification in China since 2010. Today, we rank among the top three desiccant dehumidifier manufacturers nationwide, controlling supply air down to an audited -70°C dew point.
Our engineering staff has built mission-critical climate controls for CATL, ATL, BYD, EVE Energy, Farasis, Envision, and SVOLT, and internationally for tier-one brands including Tesla, Northvolt, and TTI. We preemptively solve structural air leakage, personnel latent loads, and energy-intensive regeneration through advanced CFD airflow simulations and patented thermodynamic recoveries.
ISO 9001 & GJB Systems
CE, UL, CSA, ASME, EAC
2-Year Overseas Service Plan
In-House Test Chambers
Factory Tested Standards
CE · UL · CSA · ASME · EAC
ISO 9001:2015
-70°C
Minimum Supply Dew Point
≥99%
NMP Solvent Recovery
30%+
China Market Leadership
200+
Units Built / Month
74
Senior HVAC Engineers & PhDs
Engineering Specifications
Dew Point Selection Guide by Application
Specifying the proper humidity parameter is vital: oversized requirements skyrocket capital expenditures, while undersized units cause rapid product spoilage.
| Application & Industrial Process | Typical Controlled Dew Point / RH | Recommended AHU Architecture | Key Operational Benefit |
|---|---|---|---|
| Lithium-Ion Cell Assembly & Electrolyte Injection | -40°C to -60°C Dew Point | Turn-key Low Dew Point Dry Room System | Eliminates HF generation; elevates cell discharge retention. |
| Next-Gen Solid State & Lithium-Metal Production | Down to -70°C Dew Point | Cascading Two-Stage Desiccant Dehumidifier | Ultra-pure dry air preventing violent alkali oxidation. |
| Cathode Electrode Slurry Drying Exhaust | ≥99% Solvent Recovery | Multi-Stage Closed NMP Recovery Unit | High purity solvent recapturing with near-zero VOC venting. |
| Hygroscopic Pharma Powders & Gelatin Encapsulation | 10% – 25% Relative Humidity | Hygienic Desiccant Air Handling Unit | Suppresses powder bridging, clumping, and microbial growth. |
| Military Avionics & Defense Equipment Preservation | ≤35% – 40% Relative Humidity | GJB-Compliant Low Dew Point Storage Dehumidifier | Indefinite corrosion suspension for critical weapon assets. |
| General Industrial Warehousing & Process Pre-Cooling | 45% – 60% Relative Humidity | Refrigerative Commercial Dehumidifier | High sensible heat removal with optimized energy consumption. |
| Chemical Fuel Terminal Hydrocarbon Exhausts | EPA/EU Emission Limits | VOC Deep Condensation + RTO System | Thermal destruction of harmful aromatic emissions. |
Innovation Blueprint
Technology Roadmap: The Future of Dehumidifier AHUs
Hangzhou DryAir’s active R&D trajectory addressing thermal efficiencies, smart automation, and green refrigerants through 2030.
AI Psychrometric Dynamic Tuning
Deploying edge machine-learning modules on DryAir AHU controllers that ingest ambient weather forecasts and internal occupancy data to throttle desiccant regeneration heat, reducing annual electric loads by 18-24%.
Low-Temperature Molecular Desorption
Formulating novel metal-organic framework (MOF) rotor matrices capable of desorbing bound water molecules at merely 60°C–80°C, enabling direct utilization of low-grade industrial factory waste steam.
Ultra-Low GWP Refrigeration Staging
Transitioning direct expansion and primary cooling coils to eco-conscious refrigerants (R454B, CO2, and R290), aligning with tightening European F-Gas regulations and North American AIM Act mandates.
Full Lifecycle Engineering
End-to-End Turnkey Delivery Methodology
A transparent, five-stage EPC model keeping procurement, design engineers, and cleanroom contractors synchronized from inquiry to full-scale operations.
Stage 01
Consulting
Process enthalpy assessment, infiltration modeling, and targeted supply dew point sizing.
Stage 02
Engineering
Psychrometric airflow layout, CFD velocity balancing, and thermodynamic waste heat recovery.
Stage 03
Manufacturing
In-house CNC sheet metal fabrication, rotor casing seals, and full-load factory acceptance testing.
Stage 04
Installation
Cleanroom installation, structural air-tight ducting, electrical integration, and dew point certification.
Stage 05
Support
IoT continuous dew point monitoring, rotor rejuvenation, and on-site overseas preventative maintenance.
International Presence
Global Compliance, Logistics & Localized Support
Reliable turn-key machinery export backed by cross-border regulatory compliance and localized engineer dispatch.
Multinational Certification
Certified builds conforming to North American (UL 1995, CSA C22.2), European (CE Machinery Directive, Pressure Equipment Directive PED), and Eurasian EAC standards. Fully documented compliance packets facilitate swift municipal inspection sign-offs.
Two-Year International Service Plan
International clients benefit from our optional extended 2-year warranty service program, complete with local consumable depots, remote telemetry error-code scanning, and factory-certified mechanical technician field visits.
Modular Packaging & Fast Lead Times
With an automated production output exceeding 200 units per month, Hangzhou DryAir constructs modular, container-ready AHU assemblies that slash trans-oceanic shipping expenses and reduce on-site rig assembly periods by 35%.
Frequently Asked Questions
Procurement & Technical Questions Buyers Ask First
Transparent technical facts on performance validation, air balance capabilities, certification, and commissioning.
What is the absolute lowest dew point a DryAir desiccant dehumidifier can maintain?
Our multi-stage rotary desiccant dehumidifiers comfortably maintain continuous supply air down to a minimum of -70°C dew point (equivalent to moisture content below 0.0033 g/kg of dry air). This satisfies the rigorous requirements of lithium metal battery synthesis, solid-state electrolytes, and space payload cleanrooms.
Does Hangzhou DryAir engineer and supply complete turnkey dry rooms outside China?
Yes. We deliver complete turnkey dry room projects covering pre-sales consulting, thermodynamic load calculations, architectural insulated panel design, air handler manufacturing, ducting fabrication, on-site commissioning, and regulatory sign-offs. We have successfully delivered international projects for industry leaders such as Tesla, Northvolt, and TTI.
Which export certifications are available for international deliveries?
Depending on destination requirements, DryAir equipment can be built and certified under CE, UL (UL 1995, UL 508A for electrical panels), CSA, ASME (for pressure equipment and coils), and EAC codes. We run an ISO 9001 certified quality management plant along with the GJB national military standard system.
What is the verified solvent recovery efficiency of the DryAir NMP recovery system?
DryAir ZJRH series NMP recovery systems consistently achieve a solvent recovery rate of ≥99% on high-speed electrode coating ovens. The recovered liquid NMP can be recirculated directly into plant distillation setups, delivering rapid ROI while guaranteeing strict environmental compliance with VOC chimney emission regulations.
What post-installation and lifecycle support is provided for international buyers?
We provide remote diagnostic support via cloud-enabled telemetry, rapid dispatch of replacement components from strategic warehouses, and an optional 2-year overseas preventative maintenance package. Our factory service engineers deploy directly for on-site commissioning, airflow balancing, and operator training.
Commercial Lineup
Explore Full Industrial Air Treatment Systems (Bottom Showcase)
Compare our core dehumidification, dry room infrastructure, and exhaust abatement equipment tailored to high-load requirements.
DP -70°C
Desiccant Dehumidifier
High-capacity desiccant rotor with active heat recovery matrices delivering unmatched reliability for lithium-battery plants.
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Turnkey EPC
Turn-key Dry Room System
Single-source accountability across pre-sales consulting, enclosure erection, dew point balance, and validation.
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Recovery ≥99%
NMP Recovery System
Closed-loop condensation recovery designed to recapture 99%+ of battery cathode coating solvents cleanly.
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Cooling + RTO
VOC Abatement System
Advanced condensation cooling paired with regenerative thermal oxidizers for zero-compromise environmental compliance.
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Standard RH
Refrigerative Dehumidifier
Economical moisture removal for warehouses, pre-cooling stages, and general production lines.
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Compact DP -70°C
Glove Box AHU System
Dedicated compact desiccant units providing ultra-dry inert or clean air for laboratory isolators and pilot pouch cells.
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ATEX Rated
Vapor Recovery Skids
Explosion-proof hydrocarbon and volatile chemical vapor condensers engineered for refineries and bulk liquid docks.
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GMP Grade
GMP Dehumidifier AHU
Sanitary double-skin casing with antimicrobial washdown seals designed strictly for API packaging and sterile compounding.
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Start Your Engineering Specification
Consult With Our Senior HVAC & Dehumidification Team
Request detailed engineering CAD drawings, psychrometric load analysis, dew point curves, and project case studies within 24 business hours.