DP -70°C
Desiccant Dehumidifier DHU
High-efficiency solid-adsorption rotor engineered for stable sub-zero dew point air management across precision chemical and cell-assembly areas.
Engineered Product Portfolio
Primary Industrial Climate & Purification Equipment
Deploying advanced moisture adsorption, deep-cooling solvent condensation, and zero-leakage air recirculation for global gigafactories and regulated cleanrooms.
DP -70°C
Turnkey EPC
Turnkey Dry Room System
End-to-end engineered enclosure systems delivering airtight envelopes, differential pressure hierarchies, and unified microclimate regulation.
Recovery ≥99%
ZJRH NMP Recovery System
Industrial recovery infrastructure capturing N-Methyl-2-pyrrolidone from coater exhaust lines, reducing volatile organic emissions.
Cooling + RTO
JEN VOC Abatement Plant
Advanced deep-cooling condensation and regenerative thermal oxidizers (RTO) neutralizing industrial hydrocarbons and toxic emissions.
Low Dew Point
Ultra-Low DP Purifier Unit
Multi-stage molecular filtration coupled with dual-rotor desiccant wheels to strip latent water vapor down to microscopic moisture fractions.
Modular Cleanroom
Gigafactory Dry Chamber
High-integrity cleanroom envelopes designed with vapor-tight interlocking panels and floor air sealing for continuous 24/7 reliability.
Solvent Recovery
Closed-Loop NMP System
Integrates heat exchange arrays, high-efficiency scrubber columns, and distillation units to achieve superior solvent recycling economics.
Pre-Cooling Unit
Refrigerative Dehumidifier
High-efficiency mechanical condensation chillers serving as bulk moisture stripping stages ahead of desiccant wheels or for warehouse climate control.
Global Market Overview
Industrial Air Purifier & Dehumidifier Commercial Landscape
The global shift toward high-energy-density batteries, biopharmaceutical synthesis, and micro-lithography has redefined industrial air purification and dehumidification from basic HVAC utilities to mission-critical process engineering.
Global Decarbonization Pressures
Gigafactories consume vast electrical thermal loads solely to regenerate desiccant wheels. Modern industrial plants now demand integrated heat recovery matrices, utilizing condenser heat and flue waste to cut operational expenditures by 25% to 40% globally.
Stringent Process Tolerances
Next-generation solid-state batteries and lithium-metal anodes react violently with atmospheric moisture, necessitating continuous dew points of -60°C to -70°C. Standard commercial HVAC is obsolete; specialized hermetic adsorption rotors are now the international benchmark.
Supply Chain Regionalization & Export Scale
While manufacturing footprints emerge in North America and Europe, China remains the epicenter of advanced rotary dehumidification engineering, supplying over 60% of the world's large-scale industrial drying wheels and turnkey engineering EPC services.
Authoritative Engineering
Hangzhou DryAir: Proven Low-Dew-Point Mastery
Founded in 2010, Hangzhou DryAir Treatment Co., Ltd. has spent over a decade perfecting industrial environmental solutions. Ranking among the top 3 manufacturers in China with >30% domestic market share, we deliver auditable technical superiority.
-70°C
Min Controllable Dew Point
≥99%
NMP Solvent Recovery Rate
30%+
China Market Leadership Share
200+
Units Fabricated Monthly
74
Engineers & Technical PhDs
Tier-One Validation
Our turnkey battery dry room solutions are fully validated by global battery titans including CATL, BYD, ATL, EVE Energy, SVOLT, Farasis, Envision, Tesla, Northvolt, and TTI, meeting micro-environment standards under heavy worker loading.
Global Export Compliance
Full manufacturing alignment with international regulatory frameworks: CE marking (Machinery & EMC directives), UL508A electrical compliance, CSA safety certification, ASME code pressure vessels, and EAC customs documentation.
Quality Control & Testing Facility
Every system undergoes pre-commissioning run-ins within our in-house environmental test chambers, monitoring air tightness, static pressure loss, wheel reactivation efficiency, and sensible-to-latent thermal conversion.
Application Engineering
Localized Industrial Application Scenarios
Moisture behavior varies by chemical reactant and ambient enthalpy. DryAir customizes psychrometric solutions across specialized industrial sectors.
Lithium & Solid-State Batteries
Moisture exposure causes electrolyte salt (LiPF6) to hydrolyze into hydrofluoric acid (HF), permanently compromising cell capacity and causing catastrophic thermal runaways. DryAir maintains dew points down to -70°C across winding, stacking, and filling suites.
Pharmaceutical & Life Sciences
Hygroscopic compounds, effervescent powders, and soft gelatin capsules lose structural stability under fluctuating relative humidity. Our industrial air purification units ensure continuous 10%–20% RH compliance meeting strict GMP standards.
Military & Aerospace Storage
Precision avionics, missile propulsion stages, and optical sensors are susceptible to galvanic corrosion and microbial growth. DryAir deploys ruggedized GJB-standard dehumidifiers preventing atmospheric corrosion during prolonged mothballing.
Petrochemical & VOC Scrubbing
Volatile organic vapors produced during chemical synthesis, bulk storage loading, and paint curing present explosive hazards. Our regenerative thermal oxidation and condensation arrays recover solvents while neutralizing hazardous exhaust.
Semiconductors & Optical Glass
Micro-condensation on wafer surfaces during photolithography causes circuit defects and haze. DryAir provides hyper-stable desiccant systems capable of holding RH tolerances within ±1% across sensitive optical manufacturing spaces.
Specification Guide
Technical Roadmap & Dew Point Selection Guide
Aligning thermal loads and psychrometric requirements is essential to minimize OPEX. Compare typical operational specifications across industrial sectors below.
| Target Industrial Process | Operational Dew Point / RH Target | Recommended Technology Platform | Critical Engineering Factor |
|---|---|---|---|
| Lithium-Ion Electrolyte Filling & Stacking | -40°C to -60°C DP | Turn-Key Battery Dry Room | Airtight panels, airlock interlocks, zero vapor leakage |
| Solid-State Battery & Lithium-Metal Anodes | -60°C to -70°C DP | Dual-Rotor Desiccant Dehumidifier | Multi-stage adsorption, sub-zero low reactivation heat |
| Cathode Slurry Coater Exhaust Lines | Solvent Recovery ≥99% | ZJRH NMP Recovery System | Continuous distillation, enthalpy recovery loops |
| Hygroscopic Pharma Formulation & Packaging | 10% – 30% RH (DP < -10°C) | Sanitary Desiccant Air Purifier | HEPA filtration, stainless washdown casing |
| Military Hardware & Ordinance Reserves | ≤35% RH (DP ~ 2°C to 5°C) | Rotary Desiccant DHU Series | Corrosion mitigation, fail-safe redundant blowers |
| High-Volume Warehousing & Pre-Cooling | 45% – 60% RH | Refrigerative Dehumidifier | Low specific power consumption per liter removed |
| Chemical Tank Depots & Varnish Curing | Compliant Stack Limits | Condensation + RTO System | Deep-chilling recovery combined with thermal destruction |
Turnkey Methodology
DryAir Full Lifecycle Engineering & EPC Workflow
A unified delivery framework ensuring mechanical performance from psychrometric load audits to long-term lifecycle support.
Step 01
Process Analysis
On-site psychrometric modeling, air infiltration audits, latent occupant load calculations, and baseline target definition.
Step 02
Integrated Engineering
CFD airflow simulation, CAD/BIM duct layouts, thermal regeneration design, and multi-stage air purification matrices.
Step 03
Factory Fabrication
Precision metal fabrication, desiccant rotor assembly, electrical controls wiring to UL/CE standards, and chamber performance audits.
Step 04
Turnkey Commissioning
Field erection, vapor barrier testing, duct pressurization balancing, and stable -70°C dew point calibration under full load.
Step 05
Lifecycle Maintenance
Remote telemetry, OEM spare parts dispatch, rotor re-impregnation, and optional 2-year complete overseas service agreements.
Procurement & Technical Q&A
Frequently Asked Questions by Industrial Buyers
Comprehensive technical guidance for plant managers, HVAC consulting engineers, and procurement directors evaluating Chinese manufacturing.
What is the lowest dew point a DryAir desiccant dehumidifier can achieve in commercial operation?
DryAir rotary desiccant dehumidification systems routinely maintain supply air down to a minimum of -70°C dew point (equivalent to <0.0033 g/kg humidity ratio). This operational spec is essential for lithium battery cell assembly, electrolyte filling, and solid-state battery synthesis where ambient moisture compromises product yield.
Can DryAir execute full turnkey dry room installations outside of mainland China?
Yes. DryAir provides turnkey dry room engineering EPC contracts globally. Our scope includes architectural sandwich panels, airtight structural enclosures, desiccant air handling units, chilled water integration, process ductwork, electrical automation, and on-site commissioning. We have successfully deployed projects for global clients including Tesla, Northvolt, and TTI.
Which global export and quality certifications do DryAir machines carry?
Depending on destination specifications, DryAir products can be delivered with CE marking (Machinery, Low Voltage, and EMC directives), UL and CSA certifications for North American electrical panels, ASME certification for pressure vessels, and EAC for Eurasian customs. The company operates under ISO 9001 and the Chinese GJB national military standard quality management systems.
What solvent recovery efficiency is achieved by DryAir NMP recovery plants?
DryAir ZJRH series NMP recovery plants achieve a continuous solvent recovery rate exceeding 99% on lithium-ion cathode coating and drying lines. This recovery rate recycles raw N-Methyl-2-pyrrolidone solvent for refining and reuse, minimizing plant stack emissions in compliance with international environmental standards.
What after-sales service and ongoing maintenance are offered to international plants?
In addition to standard warranty coverage, international buyers can elect a dedicated two-year overseas service agreement. This comprehensive package includes remote 24/7 telemetry diagnostics, scheduled maintenance inspections by DryAir field engineers, rapid spare parts fulfillment, and comprehensive staff training. Full details are accessible via our Global Service division.
Procurement Shortlist
Explore All DryAir Engineered Production Units
Shortlist systems for project tenders, request psychrometric calculations, or book factory acceptance tests (FAT) directly with our technical team.
DHU Model
Desiccant Dehumidifier
Solid-adsorption rotor units delivering continuous dry air down to -70°C dew point where conventional mechanical refrigeration cannot perform.
EPC Cleanroom
Turnkey Dry Room System
End-to-end dry rooms covering pre-sales consulting, system design, enclosure manufacturing, site erection, and dew point certification.
Yield ≥99%
NMP Recovery System
Captures volatile N-Methyl-2-pyrrolidone from lithium battery electrode coater exhaust for purification, cutting solvent purchases.
Emissions Clean
VOC Abatement System
Deep-cooling condensation combined with regenerative thermal oxidizers (RTO) for petrochemical vapors and industrial VOCs.
High Volume
Modular Adsorption Purifier
Integrated air purifier dehumidifiers featuring multi-stage gas filtration and desiccant drying for sterile pharmaceutical suites.
Ultra Clean
Battery Assembly Enclosure
Airtight cleanroom envelopes engineered to prevent vapor transfer and support high personnel traffic during round-the-clock assembly.
Waste Heat Reuse
Solvent Recovery Unit ZJRH
Maximizes energy recovery through dual-stage condensation exchangers, cutting heating energy requirements on coating exhaust lines.
Pre-Cooler
Refrigerative Dehumidifier
Heavy-duty mechanical chillers engineered for bulk moisture stripping in warehouses, workshops, or as an upfront stage in low dew point trains.
Direct Factory Engineering
Partner with China's Premier Industrial Air Dehumidification Specialist
Contact our senior HVAC engineers to receive detailed psychrometric balance reports, airflow diagrams, and firm turnkey project budgets within 24 hours.