DP -70°C
Desiccant Dehumidifier
Full fresh air DHU series rotary rotor dehumidifier providing dependable ultra-dry airflow down to -70°C dew point for lithium battery dry rooms and critical defense storage.
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Primary Equipment Catalog
Full Fresh Air & Ultra-Low Dew Point Systems
Engineered for high-volume fresh air intake, VOC mitigation, and rigorous continuous psychrometric control across mission-critical facilities.
DP -70°C
Turnkey EPC
Turn-key Dry Room System
End-to-end climate-controlled industrial dry rooms, air handling, positive-pressure air locks, and automated psychrometric monitoring under single-source EPC management.
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≥99% Yield
NMP Recovery System
ZJRH Series engineered recovery setup capturing N-Methyl-2-pyrrolidone solvent vapors directly from battery electrode coater exhaust streams with greater than 99% extraction efficiency.
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Cooling + RTO
VOC Abatement System
Deep-cooling condensation coupled with multi-bed regenerative thermal oxidation (RTO) for extreme volatile organic emission abatement across industrial chemical processing plants.
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100% Fresh Air
Full Fresh Air Air-Handler
Engineered deep pre-cooling mechanical chillers paired with multi-stage silica gel/molecular sieve wheels to process 100% raw ambient fresh air in tropical and coastal climates.
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Energy Efficient
Oil Gas Recovery Plant
Heavy vapor cryogenic condensation systems developed for fuel depots and solvent handling docks, recovering refined hydrocarbon gas prior to atmospheric exhaust dispersion.
Inspect Gas Plants
ISO Class Clean
Modular Cleanroom Dehumidifiers
Integratable cleanroom air conditioners equipped with double-bubble casing, HEPA stage filtration, and sealed rotor segments to prevent microbial and particulate migration.
Modular Units
Dual Stage Pre-Cool
Refrigerative Dehumidifier
High-efficiency mechanical compression systems designed for raw warehouse storage moisture protection and heavy latent load pre-cooling upstream of desiccant rotors.
Refrigeration Series
Global Market Status & Dynamics
Macroeconomic Transition Toward Full Fresh Air Systems
Why modern industrial processes are rapidly transitioning from traditional recirculation loops to once-through, full fresh air dehumidification architectures.
Aerosol & Contamination Isolation
In next-generation solid-state lithium battery cell lines, biopharma aseptic compounding, and advanced semiconductor packaging, recirculating return air poses extreme cross-contamination risks. Full fresh air configurations enforce directional positive pressure, expelling airborne contaminants continuously without re-entrainment.
Extreme Ambient Latent Sizing
With global climate volatility driving high ambient wet-bulb extremes across Southeast Asia, coastal North America, and Central Europe, industrial plants face peak summer moisture loads. Advanced 100% fresh air systems utilize multi-stage condensation coils followed by high-capacity desiccant regeneration to absorb up to 28 g/kg moisture surges.
Strict VOC and Solvation Exhaust Mandates
Global worker safety regulations (OSHA, EU-OSHA) dictate strict airborne solvent limits. Recirculating air from rooms containing trace hazardous off-gassing (such as NMP or electrolytic carbonates) is strictly prohibited. Once-through fresh air ensures steady dilution ventilation and immediate delivery to catalytic or condensation recovery equipment.
Technological Paradigm Shift: Total Energy Recovery Integration
A historic barrier to full fresh air dehumidification was the immense thermal penalty of cooling raw ambient air down to condensing thresholds and subsequent desiccant wheel reheating. Modern Hangzhou DryAir systems overcome this through dual-wheel enthalpy circuits and waste heat flue regeneration, cutting annual parasitic plant energy consumption by up to 42% compared to decade-old installations.
Engineering Precision & Verification
Manufactured to Strict Global Industrial Standards
Hangzhou DryAir Treatment Co., Ltd. (founded 2010) ranks among the top three desiccant dehumidification authorities in China, maintaining dedicated testing chambers capable of replicating any global atmospheric condition.
-70°C
Controllable Supply Dew Point
≥99%
Solvent NMP Recovery Rate
30%+
China Battery Industry Market Share
200+
Large Scale Units Built / Month
Proprietary R&D Team
Backed by 74 dedicated technical specialists, including 6 doctoral and master degree holders, 2 national registered HVAC professional engineers, and 8 senior thermal process designers who tailor psychrometric sizing to client-specific gigafactory demands.
International Compliance Validated
Export equipment conforms directly to CE (Machinery & EMC), UL/CSA electrical and burner standards, ASME pressure vessel protocols, and EAC requirements. Fabricated under ISO 9001 and strict GJB national military manufacturing quality frameworks.
Tier-One Reference Legacy
Trusted on the factory floor by leading worldwide energy and industrial leaders including Tesla, Northvolt, CATL, ATL, BYD, EVE Energy, Farasis Energy, Envision AESC, SVOLT, and TTI for round-the-clock continuous dehumidification.
Engineering Specifications Matrix
Full Fresh Air Dehumidification vs Conventional HVAC
A detailed engineering baseline comparing mechanical refrigeration, standard recirculating desiccant systems, and Hangzhou DryAir 100% fresh air architectures.
| Performance Metrics | Standard Mechanical DX Coil | Standard Recirculation Desiccant | DryAir Full Fresh Air Desiccant |
|---|---|---|---|
| Dew Point Limit | +4°C to +8°C (Limited by freezing) | -20°C to -40°C Dew Point | Down to -70°C Dew Point |
| Moisture Removal Mechanism | Vapor condensation on chilled fins | Adsorption with partial room return air | Multi-Stage Adsorption with 100% Outdoor Air |
| VOC & Cross-Contamination Risk | High accumulation in recirculation | Moderate (re-circulated continuous loop) | Zero Risk (Positive pressure single pass displacement) |
| Ambient Tolerance (Wet Bulb) | Derates heavily above 26°C WB | Moderate operational swing | Engineered for up to 32°C WB Extreme Latent Influx |
| Regeneration Energy Source | Not applicable | Direct electric / gas burn | Hybrid (Steam / Low-grade waste heat / Gas / Electric) |
| Cleanroom Pressure Control | Passive dampers | Intermittent volume adjustment | Active VFD Closed-Loop Static Pressure Balancing |
Global Deployment Contexts
Localized Climate & Industrial Application Scenarios
Real-world engineering implementations tailored to geographic climatic constraints and process-specific environmental thresholds.
Equatorial & Coastal Humidity Zones
Region: Southeast Asia (Vietnam, Malaysia, Indonesia) and Gulf Coast USA.
Challenge: Relative humidity sustained at 90-98% with high ambient temperatures, introducing massive water loads to ventilation ducts.
DryAir Configuration: Three-stage dual-wheel full fresh air units featuring high-capacity deep chilled-water coil condensation arrays followed by a secondary synthetic zeolite desiccant rotor.
Aseptic GMP Pharmaceutical Packaging
Region: Western Europe, North America, Japan.
Challenge: Processing hygroscopic active pharmaceutical ingredients (APIs), effervescent formulations, and soft gelatin capsules without room stagnation.
DryAir Configuration: 100% fresh air air-handling with absolute seal HEPA filtration, sanitary interior washdown construction, and dew points maintained strictly at -20°C to ensure zero moisture clumping.
Gigawatt Battery Electrode Lines
Region: Global Gigafactories.
Challenge: Lithium hexafluorophosphate (LiPF6) electrolyte reacts vigorously with trace moisture, producing hydrofluoric acid (HF) gas that destroys cell yields and endangers technicians.
DryAir Configuration: Ultra-dry supply units maintaining negative-dew-point corridors (-40°C to -70°C) with single-pass sweeping air delivering immediate solvent evacuation to ZJRH NMP towers.
R&D Trajectory
Technology Roadmap: Next-Generation Dehumidification
How Hangzhou DryAir is advancing thermal adsorption thermodynamics, automation, and sustainable manufacturing practices for the next decade.
Phase 1: MOF & Low-Temp Adsorbent Matrices
Integration of Metal-Organic Frameworks (MOFs) within the honeycomb rotor matrix. Unlike conventional silica gel requiring 120°C–140°C reactivation heat, DryAir's next-gen MOF composite wheels desorb water molecules at 65°C–80°C, enabling total operation using industrial low-temperature waste hot water.
Phase 2: Dynamic Cloud Psychrometric AI
Deploying edge machine-learning PLC controllers that monitor outdoor meteorological forecasts 24 hours in advance. Predictive algorithms throttle chillers and reactivation burners in real-time, preventing over-dehumidification cycles and saving gigawatt-scale factories millions in operational overhead.
Phase 3: Integrated Closed-Loop VOC Recovery
Unifying the 100% fresh air supply stream with downstream VOC abatement and solvent capture. Combining rotary wheel adsorption, multi-stage cryo-condensation, and high-efficiency RTO regenerative units into a singular, synchronized intelligent utility module.
Direct Technical Inquiries
Frequently Asked Questions for Engineers & Buyers
Clear, unvarnished performance metrics, export guarantees, and technical criteria from the Hangzhou DryAir engineering department.
What is the lowest dew point a DryAir desiccant dehumidifier can achieve under 100% full fresh air intake?
Hangzhou DryAir rotary desiccant dehumidification systems achieve supply air dew points down to a minimum of -70°C dew point (equivalent to moisture content below 0.0033 g/kg of dry air). Even when processing raw 100% outdoor ambient air at high summer temperatures, our multi-tier cooling and compound desiccant rotor designs maintain absolute psychrometric stability for lithium cell electrolyte filling and ultra-dry gloveboxes.
Do you supply complete turnkey dry rooms for gigafactory projects outside China?
Yes. Hangzhou DryAir delivers comprehensive turnkey dry room projects worldwide covering initial psychrometric consulting, thermal architectural enclosure engineering, mechanical air-handler production, international shipping, on-site commissioning, and dew point certification. We have delivered successful projects for global clients including Tesla, Northvolt, and TTI.
Which global export and safety certifications do Hangzhou DryAir machines carry?
Depending on destination parameters, DryAir equipment is fully engineered to conform to CE (EU Machinery and Low Voltage Directives), UL (USA electrical compliance), CSA (Canadian standards), ASME (pressure vessels for refrigeration and steam coils), and EAC (Eurasian Customs Union). Factory management operates under ISO 9001 quality systems and GJB national military manufacturing quality frameworks.
What recovery yield can a DryAir NMP recovery system achieve on lithium electrode lines?
Our ZJRH Series NMP solvent recovery equipment reaches a guaranteed solvent recovery efficiency of ≥99% during continuous round-the-clock electrode coating operations. This significantly lowers raw material replenishment purchasing expenditure and eliminates volatile solvent discharge into local municipal air basins.
What international post-installation and lifecycle support is available?
International purchasers can elect an optional two-year comprehensive extended service contract. This includes 24/7 cloud telemetry remote diagnostics, rapid dispatch of critical spare parts, periodic on-site rotor performance testing, and routine maintenance audits conducted by DryAir senior commissioning engineers.
How does DryAir minimize regeneration thermal energy costs in 100% fresh air systems?
Desiccant regeneration consumes significant thermal energy. DryAir optimizes this through four engineering vectors: (1) Purge-sector heat recycling, which captures latent wheel heat to pre-heat regeneration air; (2) Multi-energy thermal coil integration allowing utilization of plant excess steam or high-temperature water; (3) Sensible air-to-air plate exchangers; and (4) Intelligent dynamic VFD modulation based on real-time dew point feedback.
Specification Ready Equipment
Select Industrial Hardware Configurations
Shortlist pre-tested standard modules or initiate custom airflow dimensioning with our application engineering division.
Heavy Duty
Standard DHU Dehumidifier
High-efficiency desiccant wheel rotor system for industrial workshops requiring continuous humidity stabilization down to -50°C and -70°C dew point.
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Custom Built
Turnkey Dry Room Architecture
Custom prefabricated modular wall panels, air ducts, dynamic airlocks, and psychrometric dehumidification modules for battery gigafactory cell lines.
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Clean Emission
NMP Solvent Stripping Skid
Autonomous closed-loop condensation and distillation towers designed to safely extract volatile organics from high-speed battery coater lines.
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Thermal Safe
JEN Series VOC Systems
Regenerative thermal oxidizers offering superior destruction removal efficiencies (DRE > 99.2%) for mixed solvent exhaust airflows.
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Assembly Ready
Cell Assembly Dehumidifier
Deep low-dew-point environmental control skids purpose-engineered for pouch, cylindrical, and prismatic lithium cell sealing bays.
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Continuous Flow
High Airflow Coater Module
High CFM air-handling exchangers specifically designed to manage dense, heated solvent exhaust streams without mechanical clogging.
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Deep Chill
VOC Deep-Cooling Condenser
Cryogenic and direct expansion pre-condensers engineered to separate complex chemical vapors before desiccant or carbon bed treatment.
System Pricing
OEM / ODM
Custom Engineered Dehumidifier
Factory custom-engineered rotary assemblies configured to exact dimensional envelopes, hazardous classified zones, and military specs.
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Engineering Support Gateway
Engage with Our Senior Psychrometric Engineers
Whether you are designing a greenfield lithium battery facility, expanding a pharmaceutical cleanroom, or retrofitting a legacy AHU system, our technical office delivers psychrometric load calculations and certified equipment drawings within one business day.