DP -70°C
DHU Desiccant Dehumidifier
Integrated desiccant wheel with thermal regenerative heat exchanger ensuring supply air dew points down to -70°C for dry rooms.
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Enterprise Solutions Portfolio
High-Efficiency Industrial Dehumidification & Heat Exchangers
Engineered to balance ultra-low dew point air treatment with intelligent latent heat recovery, drastically lowering OPEX across 24/7 demanding processing environments.
DP -70°C
Turnkey EPC
Turn-key Dry Room System
End-to-end cleanroom modular enclosure, air balancing, heat recycling, and psychrometric control optimized for battery cell manufacturing.
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≥99% Purity
NMP Recovery System
Closed-loop VOC condensation heat exchanger systems recovering >99% N-Methyl-2-pyrrolidone solvents on battery coating production lines.
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RTO Condensation
VOC Abatement System
Dual-stage deep chilling condensation and thermal oxidation heat exchanger eliminating industrial tail-gas emissions.
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High COP
Refrigerative Dehumidifier
Thermodynamic cycle cooling-coil air dry systems serving as primary sensible cooling stages before desiccant absorption units.
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Rotary Core
Low Dew Point Rotor Core
Advanced silica gel and molecular sieve ceramic matrix components custom engineered for maximum moisture adsorption.
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Vapor Recovery
Oil Gas Heat Recovery System
Cryogenic plate-fin heat exchangers built for petrochemical loading and vapor reclaim with high thermodynamic safety margins.
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Integrated AHU
Cleanroom AHU Integration
Custom industrial air-handling units incorporating sensible and latent heat recovery coils, multi-stage HEPA filters, and inverter blowers.
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Macro Industry Dynamics
Global Dehumidification & Heat Exchange Landscape
As modern clean tech, solid-state battery fabrication, and advanced biopharma scale up, industrial dehumidification has shifted from a simple auxiliary utility to a core production determinator directly controlling scrap rates, process stability, and carbon footprints.
Thermal Energy Optimization
Thermal regeneration of rotary desiccant systems accounts for up to 40% of total electrical and thermal utility consumption in dry rooms. Global tier-1 operators demand heat-pipe exchangers and run-around coil systems that capture residual exhaust heat to preheat regeneration air streams.
Stringent Yield & Moisture Tolerances
Lithium-ion chemistries (such as high-nickel NMC and next-generation lithium metal) undergo rapid side reactions with trace ambient moisture, producing harmful Hydrofluoric Acid (HF). Modern gigafactories mandate constant dew point operations between -50°C and -70°C without variance.
Decarbonization & Solvent Reuse
Volatile organic compounds (VOC) and toxic carrier solvents like NMP face stringent carbon border adjustments and zero-discharge industrial waste standards in Europe, North America, and East Asia, driving demand for coupled chilling-recovery-adsorption units.
Application Engineering
Precision Localized Application Scenarios
Engineered psychrometric control configured directly around process sensitivity, localized outdoor climate extremes, and stringent industry hygiene regulations.
Lithium & Solid-State Batteries
Supplying ultra-dry air down to -70°C dew point during electrolyte filling, cell winding, and electrode packaging. Custom heat exchangers minimize latent heat load from incoming fresh air.
Pharmaceutical & Medical APIs
Preventing moisture-induced powder agglomeration, gelatin capsule degradation, and microbial growth within cleanrooms regulated under strict cGMP and FDA Class 100/1000 parameters.
Defense, Marine & Aerospace
Engineered under national GJB military standards to eliminate oxidation, mold, and electronic corrosion in ammunition depots, avionics labs, and naval storage facilities under coastal relative humidity.
Petrochemical & VOC Recovery
Multi-stage condensation systems recycling vapor streams during hydrocarbon fuel transfer and coating processes, maintaining explosive-proof and compliant emission boundaries.
China Manufacturing Resilience
Factory Capacity, Quality Control & Supply Chain Agility
Combining complete vertical integration from sheet metal laser fabrication and coil winding to automated rotor assembly with certified global testing standards.
200+
Units / Month Output
Parallel manufacturing lines support multi-gigawatt gigafactory rollouts.
-70°C
Dew Point Guaranteed
Continuous psychrometric validation in certified testing chambers.
≥99%
Solvent Recapture
Proprietary dual condensation heat exchangers recovering NMP solvent.
74+
HVAC & R&D Engineers
Senior HVAC specialists, PhDs, and certified mechanical technicians.
The China Factory Supply Advantage
Located in the Qingshan Industrial Park of Hangzhou, DryAir benefits from direct integration with the world's most dense supply chain for precision sheet metal, variable frequency drives, hermetic scroll/screw compressors, and high-performance molecular sieves. This localized cluster ensures component lead times under 3 weeks, transparent cost structures, and rigorous pre-shipment FAT testing inside our proprietary climate-simulating test facilities.
Strategic Technology Roadmap
Next-Generation Heat Exchange & Dehumidification Innovations
Continuous R&D initiatives bridging machine-learning predictive operations, low-GWP refrigerants, and revolutionary heat exchange thermodynamics.
Phase 1: Present Core
Heat Pipe Energy Recycling
Integrating multi-circuit thermosyphon heat pipes across precooling and reheat air sections, recapturing sensible heat without parasitic electrical energy, lowering refrigeration loads by up to 28%.
Phase 2: Transition
AI Psychrometric Optimization
IoT embedded edge controllers dynamically adjusting wheel rotational velocity, regeneration heater firing rates, and bypass damper positions matching real-time exterior weather shifts and indoor worker loads.
Phase 3: Horizon
Eco-Refrigerants & Ultra-Seals
Development of natural refrigerant systems (CO2 R744 and low GWP A2L fluids) coupled with zero-leak magnetic fluid desiccant rotor seals to achieve zero fugitive emissions for sustainable manufacturing.
Engineering Specifications
Psychrometric Dew Point Selection Matrix
Selecting appropriate design parameters prevents either expensive system over-specification or product yield losses from uncontrolled humidity.
| Target Industrial Application | Process Environment Criteria | Operational Dew Point / RH | Recommended Core System |
|---|---|---|---|
| Lithium-Ion Cell Assembly & Filling | Moisture sensitivity to prevent toxic HF acid formation | -40°C to -60°C Dew Point | Turnkey Dry Room EPC |
| Next-Gen Solid State & Li-Metal | Extreme air dryness mandatory for chemical stability | Down to -70°C Dew Point | Dual-Rotor Desiccant DHU |
| Cathode/Anode Slurry Coater Lines | Volatile organic compound recapture & exhaust reuse | ≥99% Solvent Recapture | ZJRH NMP Recovery System |
| Pharmaceutical API Granulation & Packaging | Hygroscopic powder prevention, GMP sterile conditions | 10% to 30% Relative Humidity | Industrial Desiccant Unit |
| Aerospace Avionics & Military Depots | Corrosion, mold prevention under GJB standards | ≤40% Relative Humidity | GJB Rated Desiccant System |
| General Storage Warehousing | Surface condensation avoidance & pre-cooling stage | 45% to 60% Relative Humidity | Refrigerative Dehumidifier |
| Industrial Tail Gas & Solvent Emission | VOC emission limits & chemical vapor condensation | Sub-PPM Emission Standard | Deep Condensation + RTO |
Reliability & Compliance
Global Service Infrastructure & Compliance Standards
Serving international clients including Tesla, Northvolt, CATL, and TTI through comprehensive certification, remote diagnostics, and on-site engineering dispatch.
International Certifications
Engineered to satisfy stringent regional compliance: CE (Europe), UL & CSA (North America), ASME boiler and pressure vessel codes, and EAC (Eurasian Union), expediting electrical and environmental permitting.
Overseas Lifecycle Support
Optional 2-year extended international maintenance agreements, on-site commissioning by fluent technical teams, spare parts depots, and 24/7 cloud telemetry for instantaneous troubleshooting.
Tier-1 Validated Track Record
Delivering over 30% of China's desiccant dehumidifier market share with repeat installations at CATL, ATL, BYD, EVE Energy, Farasis, Envision, and SVOLT, proving reliability in multi-gigawatt continuous production.
Engineering Whitepapers
Technical Insights & Field Engineering Articles
Field-tested guidance from our thermodynamics and cleanroom specialists on maximizing system efficiency and stability.
VOC Abatement
How Oil Gas Condensation Recovery Systems Work
Deep chilling heat exchangers condense heavy volatile hydrocarbon vapors during loading, eliminating atmospheric venting and preserving commercial fuels.
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Solvent Engineering
Maintaining Continuous NMP Recovery Stability
Addressing duct condensation, latent load fluctuations, and temperature differential balancing to sustain >99% continuous solvent recapture.
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Cleanroom Standards
Humidity Failures in Modern Drug Manufacturing
Evaluating the true cost of latent humidity during tablet pressing and sterile packaging, with actionable design steps to eliminate batch rejection.
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Procurement & Engineering Due Diligence
Frequently Asked Technical & Commercial Questions
Clear, unvarnished insights into factory capabilities, psychrometric performance, export certifications, and after-sales commitments.
What makes Hangzhou DryAir a trusted China dehumidification heat exchanger supplier?
Operating since 2010, DryAir holds over 30% of China's desiccant dehumidification market share and ranks among the top 3 manufacturers domestically. We maintain a staff of 74 technical specialists (including HVAC master's, PhDs, and registered senior engineers). Having delivered critical systems for tier-1 players like CATL, BYD, Tesla, and Northvolt, our solutions are proven at full gigafactory scale.
What lowest supply air dew point can your rotary desiccant systems achieve?
Our rotary desiccant dehumidification systems achieve supply air dew points down to -70°C under continuous 24/7 operating loads. This extreme dryness is mandatory for lithium battery cell assembly, dry room electrolyte filling, and next-generation lithium metal and solid-state battery chemistry.
Can DryAir execute full turnkey dry room installations outside of China?
Yes. We provide complete turnkey dry room delivery across international sites, covering initial psychrometric design, mechanical and structural engineering, factory manufacturing, export crating, on-site installation, balancing, commissioning, and validation. We have successfully executed projects globally for brands including Tesla, Northvolt, and TTI.
What export certifications and quality standards do your units satisfy?
Depending on destination parameters, DryAir equipment is fully engineered to comply with CE, UL, CSA, ASME, and EAC standards. Our manufacturing facilities operate strictly under ISO 9001 quality management systems and the rigorous GJB national military standard system.
How does your NMP solvent recovery system achieve ≥99% efficiency?
Our ZJRH series utilizes an advanced multi-stage condensation heat exchanger combined with deep chilling and secondary adsorption. By recovering sensible heat and maintaining high-efficiency thermal transfer surfaces, we consistently recover over 99% of high-purity N-Methyl-2-pyrrolidone from coater exhaust, dramatically cutting solvent costs.
What warranty and after-sales service is provided to international buyers?
International customers benefit from full factory technical support, rapid-dispatch spare parts logistics, remote PLC telemetry diagnostics, and an optional 2-year full-service operational warranty with overseas engineer site dispatch.
Engineered Equipment Series
Explore Our Core Dehumidification Heat Exchanger Models
Select your equipment configuration or connect with our application engineers for custom load calculations, psychrometric charts, and CAD layout integration.
DHU Series
DHU Desiccant Dehumidifier
Rotary adsorption moisture removal providing continuous -70°C dew point air with integrated regeneration heat exchange.
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Turnkey EPC
Turn-key Dry Room System
Custom structural panels, airtight airlocks, duct distribution networks, and industrial HVAC controllers delivered under one contract.
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Recovery ≥99%
NMP Recovery System
Recaptures NMP solvent from lithium electrode coater drying exhaust, preserving operational cash flow and environmental safety.
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VOC Abatement
VOC Abatement System
Thermal regenerative thermal oxidation and condensing heat exchangers engineered for hazardous industrial VOC streams.
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Refrigerative
Refrigerative Dehumidifier
Heavy-duty commercial cooling dehumidifiers for warehouses, seed storage, archive preservation, and pre-treatment stages.
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Plate-Fin Core
Oil Gas Recovery Unit
Engineered cold-recovery condensation modules built to mitigate hydrocarbon vapor loss at refinery depots and chemical loading terminals.
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Custom Cleanroom
Modular Cleanroom Dehumidifiers
Compact footprint desiccant air handling units specifically sized for pilot battery research labs and specialized pharmaceutical suites.
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RTO System
RTO Clean Air Exchangers
High-temperature ceramic heat bed recovery units destroying organic compounds with thermal recovery efficiencies exceeding 95%.
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Ready to Engineer Your Low Dew Point Solution?
Partner with China's Foremost Dehumidification Heat Exchanger Specialists
Get in touch with our engineering team for personalized psychrometric load assessments, airflow schematics, and competitive RFQ quotations tailored to your exact plant requirements.
Direct Engineering Hotline: +86-571-8990-5557
Technical Email: [email protected]
Factory: No. 2088 Keji Road, Qingshan Industrial Park, Lin'an, Hangzhou, China