DP -70°C Control
Desiccant Dehumidifier
DHU series rotary desiccant dehumidifiers deliver stable ultra-low dew-point air for battery production and pharmaceutical facilities.
Explore SolutionEngineered Humidity Control Series
Standard & Custom Industrial Dehumidifier Equipment
Explore our core engineering catalog designed for continuous heavy-duty industrial environmental control, solvent recovery, and zero-defect manufacturing.
DP -70°C Control
Turnkey EPC
Turn-key Dry Room System
Fully integrated air handling, structural panels, and deep dew point management engineered under single-point validation contracts.
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≥99% Recovery
NMP Recovery System
Captures volatile organic solvents from cathode coating exhaust lines, reducing process raw material spend and plant emissions.
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Cooling + RTO
VOC Abatement System
Deep condensation cooling combined with regenerative thermal oxidizers to safely treat hazardous industrial off-gases.
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Energy Efficient
Refrigerative Dehumidifier
High-efficiency mechanical refrigeration systems for bulk moisture extraction, clean storage workshops, and pre-cooling stages.
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Battery Grade
Lithium Battery Dry Room
Custom-engineered AHU and multi-stage desiccant rotor combinations maintaining -40°C to -60°C dew point during 24/7 cell assembly.
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GMP Compliant
Pharma Moisture Control
Sanitary casing, HEPA filtration, and strict RH management (10-30% RH) preventing degradation of hygroscopic active powders.
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GJB Standard
Defense & Aerospace Units
Heavy corrosion-resistant environmental conditioning units built according to stringent national military standard systems.
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TESLA GIGAFACTORY
NORTHVOLT
CATL
BYD AUTO
EVE ENERGY
FARASIS
ENVISION AESC
TTI GROUP
SVOLT ENERGY
ATL BATTERY
Market Leadership & Engineering
China's Premier Industrial Dehumidifier Solution Providers
Industrial desiccant dehumidification is no longer a peripheral HVAC accessory; it is the fundamental infrastructure enabling global electric vehicle electrification, advanced biopharmaceuticals, and precision electronics.
Tier-1 Market Proven
Hangzhou DryAir Treatment Co., Ltd. (established in 2010) ranks among the top three industrial desiccant dehumidifier manufacturers in China, commanding over 30% domestic market share across gigafactory battery installations.
Deep Science & Dew Point Physics
Delivering supply air down to an extreme -70°C dew point. Our thermodynamic designs eliminate air leakage, solve sensible/latent thermal shifts, and harness waste heat regeneration systems to lower operating expenditure.
Turnkey Integrated Execution
Eliminate multi-contractor conflict. DryAir owns the end-to-end outcome from computational psychrometric design, fabrication, and clean envelope erection to on-site commissioning and automated PLC validation.
Global Market Dynamics
The Global Shift in Industrial Dehumidification Solutions
Across North America, Europe, and the Asia-Pacific region, rising clean energy investments and heightened environmental regulations have shifted demand from generic comfort HVAC to high-tolerance process dehumidification.
Global Battery Gigafactories
The electric vehicle transition demands immense dry room square footage. Moisture reacting with LiPF6 electrolyte generates corrosive hydrofluoric acid (HF), permanently compromising cell stability, driving the necessity of -40°C to -70°C dew point environments.
Pharmaceutical & Biologics
Hygroscopic compounds, biological powder blending, and effervescent tablet encapsulation strictly dictate moisture levels below 20% RH. Inadequate dehumidification causes batch agglomeration, caking, and regulatory non-compliance.
Emissions & Circular Recovery
Environmental standards (EPA, EU Industrial Emissions Directive) penalize volatile venting. Modern industrial facilities integrate standard desiccant dryers with closed-loop solvent condensation to recover ≥99% of active NMP solvent.
Engineered Deployments
Localized Industrial Application Scenarios
Standard industrial dehumidifier systems must adapt dynamically to local meteorological baselines—from humid coastal regions to sub-zero continental climates.
High Ambient Humidity Regions
In regions such as Southeast Asia, coastal North America, and Southern China, ambient moisture regularly spikes above 24 g/kg dry air. Our two-stage pre-cooling coils knock out condensing moisture before the air hits the high-capacity silica-gel or molecular sieve desiccant rotor.
Cleanroom Process Integration
Standard industrial dehumidifiers are engineered with double-skin polyurethane foaming panels (50mm thickness) and thermal break aluminum frameworks, preventing condensation leakage while meeting ISO Class 5 to 8 particulate cleanliness parameters.
Electrode Slurry & Cell Filling
In gigafactory winding and assembly bays, hundreds of personnel create sudden latent moisture surges. Our predictive algorithms modulate regeneration air flow and heater stages real-time to stabilize the interior environment within ±1°C and ±1.5°C dew point.
Manufacturing Depth
China Factory Supply Chain Resilience & Delivery Velocity
Why leading global EPCs and gigafactory operators contract Hangzhou DryAir over Western European or North American equipment assemblers.
200+ Systems Monthly Capacity
Our modern manufacturing base in Lin'an Qingshan Industrial Park supports parallel line throughput for massive multi-gigawatt facilities without extending contract lead times.
100% In-House Performance Testing
Unlike simple modular assemblers, Hangzhou DryAir operates a full-scale in-house psychrometric environmental test chamber to validate air flows, dew points, and power draw prior to port clearance.
Interdisciplinary R&D Backbone
Staffed by 6 master's and doctoral degree researchers, 2 national registered HVAC engineers, 8 senior engineers, and 58 skilled assembly specialists specializing in thermodynamic rotary rotors.
Innovation Roadmap
Technical Roadmap: Next-Generation Humidity Management
As solid-state lithium-metal chemistry and sub-nanometer semiconductor manufacturing mature, process environmental standards are advancing from static humidity control toward dynamic, cognitive energy optimization.
Low-Temperature Desorption Rotors
Conventional desiccant regeneration consumes significant thermal energy (120°C–140°C). DryAir is pioneering low-temp desorption matrix composites that regenerate at 70°C–85°C, allowing the integration of industrial waste heat and heat pump coils to lower thermal OPEX by up to 38%.
AI Predictive Moisture Profiling
By coupling in-line capacitive and chilled-mirror dew point sensors with weather station predictive inputs, our automated PLCs dynamically modulate rotor RPM, regeneration heater duty, and face-and-bypass dampers, matching process humidity changes before indoor deviations occur.
Zero-Ozone Global Refrigerants
Aligning with the Kigali Amendment and global environmental mandates, our pre-cooling systems are transitioned to low-GWP refrigerants (R454B, R513A, and natural CO2 systems), enabling carbon-neutral plant audits for multinational enterprises.
Design & Selection Baseline
Engineering Specification Matrix by Process
Specifying the wrong dew point is the most common and costly mistake in clean facility design: too loose risks catastrophic product contamination, while overly strict parameters inflate capital expenditure.
| Target Industrial Application | Required Dew Point / RH | Critical Risk Factor | Recommended Machine Architecture |
|---|---|---|---|
| Lithium-Ion Cell Assembly & Electrolyte Filling | -40°C to -60°C DP | Electrolyte reaction creating toxic HF acid & swell | Dual-Rotor Desiccant Dehumidifier + Deep Chilled Water |
| Solid-State & Next-Gen Lithium Metal | Down to -70°C DP | Severe violent reaction of lithium metal with H2O vapor | Turn-Key Dry Room + Ultra-Low Leak Sealed Enclosure |
| Electrode Slurry Coating & Exhaust Drying | ≥99% Solvent Recovery | VOC vapor air discharge & solvent procurement cost | Condensation Recovery System + Secondary Scrubber / RTO |
| Hygroscopic Pharma Powders & Blister Packaging | 10% – 30% RH | Active ingredient caking, mold growth, batch loss | GMP Desiccant Dehumidification Air Handler Unit |
| Ammunition, Munitions & Avionics Storage | ≤40% RH | Propellant degradation, electrical shorting, casing rust | GJB Standard Ruggedized Desiccant System |
| Raw Material Warehouses & Pre-Cooling | 45% – 60% RH | Bulk condensation, structural corrosion, packaging softness | Industrial Refrigerative Condensation Dehumidifier |
E-E-A-T Compliance Framework
Global Certification & International Service Support
Sourcing large-scale industrial machinery from China requires verifiable engineering accountability, international code compliance, and reliable multi-year technical field support.
Full Global Export Compliance
Hangzhou DryAir units are certified under CE (Machinery & Pressure Directives), UL 1995/UL 60335-2-40 (North America), CSA (Canada), ASME Boiler & Pressure Vessel standards, and EAC (Eurasian Customs Union). Manufactured under strict ISO 9001 and national military GJB quality guidelines.
Global Field Commissioning
Our senior commissioning engineers deploy globally across Europe, North America, Southeast Asia, and the Middle East to supervise installation, perform leak detection, conduct electrical sign-offs, and guide local facility technicians.
Optional 2-Year Extended Service SLA
International clients can secure an optional two-year comprehensive parts and service SLA, cloud-linked remote telemetry diagnostics, and guaranteed regional spare-part dispatch within 48 hours to minimize plant downtime.
Procurement & Engineering FAQ
Frequently Asked Questions by Industrial Buyers
Authoritative technical answers to key questions asked by engineering leads, procurement heads, and plant managers.
What is the minimum controllable dew point Hangzhou DryAir systems achieve?
DryAir rotary desiccant dehumidifiers achieve stable supply air down to -70°C dew point (equivalent to less than 0.002 g/kg moisture content). This ultra-dry capability is specifically engineered for next-generation lithium metal battery lines, high-nickel cathode assembly, and extreme aerospace testing.
Does DryAir engineer complete turnkey dry rooms outside of China?
Yes. DryAir provides complete turnkey EPC execution internationally—handling initial psychrometric calculation, sandwich panel room enclosures, air handling units, dehumidifier integration, ductwork layout, and final dew point validation. We have supported international global clients including Tesla, Northvolt, and TTI.
How does DryAir's NMP recovery system achieve ≥99% solvent recovery efficiency?
Our ZJRH series utilizes a patented multi-stage sensible cooling condensation technology coupled with secondary adsorption wheels. By precisely staging exhaust cooling temperatures, the solvent is condensed out of the coater air stream with minimum pressure drop, preserving thermal energy and reclaiming pure NMP for recycling.
Which electrical and pressure vessel codes do your systems comply with?
Depending on target project geography, our units are customized and certified under CE Directives, UL 1995/UL 60335, CSA C22.2, ASME pressure vessel codes, and EAC standards. Our plants are certified under ISO 9001 quality systems and China's GJB national military manufacturing standard.
What after-sales service and spare parts support exist for international buyers?
We provide remote diagnostic telemetry via secure IoT modules, dispatch field engineers for on-site commissioning, supply critical spare parts kits with delivery, and provide an optional two-year comprehensive service agreement for plant peace of mind.
How does rotary desiccant dehumidification compare to refrigerative dehumidification?
Refrigeration dehumidifiers remove moisture via mechanical condensation on chilled cooling coils, which becomes inefficient below 40% RH or dew points under 5°C due to coil frost formation. Desiccant dehumidifiers utilize chemical adsorption within a honeycomb silica or molecular sieve rotor, effectively functioning down to -70°C dew point without risk of freezing.
Equipment Catalog
Explore Full Industrial Dehumidification Configurations
Shortlist industrial dehumidification units, VOC thermal treatment, and turn-key enclosures for your engineering requirements.
Rotary DHU
Desiccant Dehumidifier
Engineered for continuous low-dew-point environmental control across battery, defense, and pharmaceutical processes.
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Full EPC
Turn-key Dry Room System
End-to-end design, modular room wall structures, low-leak ductwork, and deep dew point air handling machinery.
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Solvent Recovery
NMP Recovery System
Captures valuable N-Methyl-2-pyrrolidone solvent from lithium battery coating exhausts with over 99% efficiency.
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Clean Exhaust
VOC Abatement System
Deep chilling condensation coupled with regenerative thermal oxidation (RTO) for toxic chemical emissions abatement.
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Bulk Dehum
Refrigerative Dehumidifier
Dependable mechanical refrigeration units designed for warehouses, process workshops, and bulk drying stages.
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Vapor Condense
Oil Gas Condensation Unit
Engineered for fuel terminals, petrochemical plants, and oil loading docks to recapture hazardous volatile vapors.
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Solvent Reuse
Continuous Solvent Skid
Integrated skidded systems providing closed-loop continuous condensation and purification for industrial solvent recovery.
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Custom HVAC
Heavy Process AHU
Custom-fabricated industrial air handlers pairing multi-stage chillers with desiccant wheels for extreme climates.
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Contact our senior HVAC engineers to receive a psychrometric load analysis, schematic layout, and verified budgetary quote for your facility within 24 business hours.