Ceiling Mounted Dehumidifier | OEM/ODM Manufacturer
8 models from 20 to 488 L/day. Duct-ready, RS485/Modbus BMS integration, continuous drain — sized for projects from 20 m² to 1,000 m².
OEM/ODM Ceiling Mounted Dehumidifiers — Your Brand, Your Specs
Tell us your target market’s voltage, humidity range, and branding requirements — we handle the rest. Every unit is built, tested, and packed under your label at our factory.
- Your Logo, Your Color — private label packaging included
- 8 Capacities: 20L to 488L/day, covering 20–1,000 m²
- Wi-Fi / RS485 (BMS/Modbus) — ready for smart building projects
- Filtration from standard pre-filter to MERV-13
- Gravity or pump drain — specify per your install conditions
What's Built into Every Unit — So You Don't Have to Spec It Separately
These are standard on every RWDD unit — not add-ons. Hydrophilic-fin coils for faster condensate shedding, RS485/Modbus for BMS integration, 3-minute anti-short-cycle compressor protection, and continuous drain. Your clients get lower downtime and lower total cost of ownership out of the box.
| Feature | Our Standard (Ruiwang RWDD) | Impact for You |
|---|---|---|
| Installation & Airflow | Ceiling-mounted, low-profile body; duct-ready for even air distribution | Saves floor space and delivers uniform humidity across larger areas |
| Compressor & Protection | High-efficiency branded compressor with 3-minute auto-restart delay; phase sequence/phase-loss detection; real-time fault code | Longer compressor life, fewer failures, faster troubleshooting |
| Controls & Integration | Digital humidistat (10-95% RH); external wall controller option; RS485/Modbus for BMS; timer & memory | Precise RH control and centralized monitoring for commercial sites |
| Coils & Heat Exchange | Copper tubes + hydrophilic aluminum fins; corrosion-resistant coated coils | Better condensate shedding, stable performance in high humidity |
| Drainage & Defrost | Hose connection for continuous drain; automatic defrost | "Set & forget" 24/7 operation—no manual tank emptying |
| Operating Range | Ambient 5–38 °C; models 20/60/90/138/158/248/288/488 L/day; airflow 250–5600 m³/h | Right-sized selections from small rooms to ~1000 m² |
| Connectivity & Safety | RS485 multi-unit online control; protections incl. phase loss, delay, fault memory | Easier multi-site management; reduced service risk |
| Serviceability | External controller & clear fault display; accessible filter bay | Shorter maintenance time and lower lifetime cost |
Where Ceiling Mounted Dehumidifiers Are Used
Ceiling-mounted and ducted dehumidifiers install above the occupied zone — no floor space lost, no obstruction to foot traffic or equipment. Dry air is delivered directly where moisture loads are highest, maintaining RH between 30–60% depending on the application.
Residential (Home):
living room, bedroom, bathroom, basement
Workplaces & Public Buildings:
offices, classrooms, retail, public libraries
Leisure & Wellness:
gyms, spas, indoor pool rooms (natatoriums)
Industrial & Specialty Storage:
warehouses, archives, labs, healthcare areas
Technical Specifications — All Ceiling Mounted Dehumidifier Models
All data measured at 30 °C / 80% RH. 8 models covering 20–488 L/day and 250–5,600 m³/h airflow. Every model includes digital humidistat (10–95% RH), continuous drain, and RS485/Modbus readiness. Not sure which model fits your project? Send us the room size and target RH — we’ll spec it for you within 24 hours.
| Model | RWDD-261E | RWDD-601E | RWDD-901E | RWDD-1381E |
|---|---|---|---|---|
| Capacity (30°C, RH80%) | 20L/D | 60L/D | 90L/D | 138L/D |
| Voltage frequency | 220V/50Hz | 220V/50Hz | 220V/50Hz | 220V/50Hz |
| Apply area | 20-35m² | 50-80m² | 90-120m² | 100-150m² |
| Power | 350W | 850W | 1600W | 2100W |
| Fan | 250m³/h | 600m³/h | 900m³/h | 1100m³/h |
| Fan (CFM) | 147 CFM | 353 CFM | 530 CFM | 647 CFM |
| Work Temperature | 5°C-38°C | 5°C-38°C | 5°C-38°C | 5°C-38°C |
| Control humidity | 10%-95% | 10%-95% | 10%-95% | 10%-95% |
| Refrigerant | R410a/R22 | R410a/R22 | R410a/R22 | R410a/R22 |
| Weight | 27kg | 35kg | 40kg | 42kg |
| Size | 600×275×175mm | 700×370×430mm | 805×540×445mm | 805×540×445mm |
| Model | RWDD-1581E | RWDD-2481E | RWDD-2881E | RWDD-4881E |
|---|---|---|---|---|
| Capacity (30°C, RH80%) | 158L/D | 248L/D | 288L/D | 488L/D |
| Voltage frequency | 220V/50Hz | 380V/50Hz | 380V/50Hz | 380V/50Hz |
| Apply area | 150-220m² | 300-450m² | 400-600m² | 600-1000m² |
| Power | 2600W | 4900W | 5500W | 9800W |
| Fan | 1200m³/h | 2400m³/h | 2800m³/h | 5600m³/h |
| Fan (CFM) | 706 CFM | 1412 CFM | 1648 CFM | 3296 CFM |
| Work Temperature | 5°C-38°C | 5°C-38°C | 5°C-38°C | 5°C-38°C |
| Control humidity | 10%-95% | 10%-95% | 10%-95% | 10%-95% |
| Refrigerant | R410a/R22 | R410a/R22 | R410a/R22 | R410a/R22 |
| Weight | 49kg | 87kg | 89kg | 160kg |
| Size | 940×580×480mm | 1110×940×500mm | 1110×940×500mm | 1320×910×700mm |
About the Factory — Shandong Ruiwang
Shandong Ruiwang manufactures ceiling-mounted, ducted, portable, and industrial dehumidifiers at our own production facility in Weifang, Shandong.
We supply OEM/ODM partners, distributors, and project contractors across 18 countries.
Annual production capacity: 50000 units.
Certifications: CE / ISO 9001
Why Choose Ruiwang Dehumidifier
OEM Manufacturing at Scale
Automated coil lines and in-house metalwork enable consistent output from pilot runs to 1,000+ units monthly, with customizable panels, branding, and control logic tailored to your application.
Certified Quality & Safety
ISO 9001 factory, CE/UKCA conformity and listed components, with 100% functional testing, leak detection and burn-in to ensure reliability in harsh, round-the-clock industrial environments.
Energy-Efficient Drying
High-COP compressors, smart defrost, high power fans reduce power consumption up to 25%, lowering lifetime operating costs for warehouses, production lines, and logistics facilities.
Flexible MOQs & Lead Times
Start from a minimum of 1 units with a swift 15–30 day production after approval. Stocked components and modular designs shorten build cycles and help you hit seasonal demand.
Global Logistics & After-Sales
Export-ready packaging, DDP or FOB terms, and multilingual technical support. Spare parts kits and a 12–24 month warranty keep critical environments protected with minimal downtime.
Most Asked Questions
Common questions from HVAC contractors and purchasing teams about ceiling-mounted dehumidifier installation, sizing, controls, and procurement. If your question isn’t listed, send us your room size, target RH, and voltage/phase — we’ll respond within 24 hours.
Watch our comprehensive installation guide video that covers everything from wall preparation to final setup and testing.
- Structural support: Ceiling structure must carry unit weight; use rated anchors/hangers/rods per manual.
- Power supply: Match the nameplate voltage/phase (e.g., 220 V 1φ small units; 380 V 3φ high-capacity).
- Condensate drainage: Provide continuous fall (~1/4″ per foot) with a P-trap; add a pump if lift is needed.
- Service & airflow clearance: Keep in/outlets unobstructed and allow space for filters, panels, electrics and ducts.
Avoid placing the unit too close to a wall to prevent short-circuit airflow (air recirculating back into the intake). A practical guideline is at least 600 mm (24 in) when possible, but final spacing should follow the model’s airflow layout.
Not necessarily. Ceiling mounting saves floor space and can simplify drainage and ducting in many projects. In some installations, the same unit can be floor-installed if airflow and drainage are correctly arranged—please confirm with the chosen model.
Yes, we offer complete turnkey solutions including installation, commissioning, staff training, and ongoing maintenance support through our global service network.
Clearance depends on the model and service access points. As a rule, allow space for drain routing, air intake/outlet airflow, and maintenance access (filters, electrical service, inspection). We’ll provide the required clearances on the selected model drawing.
Noise control typically focuses on vibration isolation and installation quality—proper mounting, anti-vibration pads/isolators, flexible connections where needed, and avoiding resonance with ceiling structures. We can suggest options based on your installation constraints.
Stock models ship within 3 business days. OEM/ODM orders with custom branding and packaging typically require 15-25days from order confirmation. Lead times may vary during peak season (May–August) — confirm with our sales team for current availability.
Get Your Ceiling Mounted Dehumidifier Quote
Share your room size, target RH, voltage/phase, and timeline—our engineers will recommend a right-sized, duct-ready solution within 24 hours.
Contact Information
Phone & WhatsApp
+86-571-8805-3366
+86-153-0581-0157
Address
Zhengtai Road, Chongwen Street, Weifang, Shandong, China
Business Hours
Business Hours
Monday - Friday: 9:00 AM - 6:00 PM (CST)
24/7 Emergency Support Available
Response Guarantee
✓ Email inquiries: Within 24 hours
✓ Technical questions: Within 48 hours
✓ Urgent issues: Immediate response
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