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Description
RD31S-4DW.6Q.AL ZIEHL-ABEGG Centrifugal Fan 3~400V 3.9kW 11.0/6.4A 1300rpmZIEHL ABEGG RD31S 4DW. 6Q. AL Centrifugal Fan 3. 9kW German Made ZIEHL ABEGG RD31S 4DW. 6Q. AL Centrifugal Fan 3. 9kW 400V 1300rpm GERMAN ENGINEERING High performance industrial centrifugal fan engineered for extreme durability (>10 years), whisper quiet operation, ultra low energy consumption, and powerful high volume airflow. Perfect for heavy duty HVAC, industrial ventilation, cooling systems, and critical thermal management. Download Official
ZIEHL-ABEGG RD31S-4DW.6Q.AL Centrifugal Fan
⚡ 3.9kW | 400V | 1300rpm | GERMAN ENGINEERING
High-performance industrial centrifugal fan engineered for extreme durability (>10 years), whisper-quiet operation, ultra-low energy consumption, and powerful high-volume airflow. Perfect for heavy-duty HVAC, industrial ventilation, cooling systems, and critical thermal management.
📄 Download Official Datasheet (PDF)Core Performance Advantages
10+ Years Industrial Durability
German-engineered by ZIEHL-ABEGG with robust 41kg heavy-duty construction, premium sealed bearings, and reinforced housing. Proven to operate reliably for over a decade in the harshest industrial environments.
Ultra-Quiet Operation
Aerodynamically optimized centrifugal impeller and precision dynamic balancing deliver exceptionally low noise levels. Ideal for noise-sensitive facilities despite high power output.
Energy Saving / Low Power Draw
Efficient 3.9kW motor with only 11.0/6.4A current draw at 400V three-phase. Exceptional energy efficiency for continuous 24/7 industrial operation.
High Airflow & Superior Cooling
Optimized operation at 1300 rpm generates exceptional centrifugal airflow with high static pressure. Provides outstanding heat dissipation for large industrial equipment and heavy machinery.
Applications Across Industries
The RD31S-4DW.6Q.AL is a versatile solution for demanding ventilation and cooling challenges across global markets.
🏭Industrial Ventilation
❄️Commercial Air Conditioning
🧊Industrial Refrigeration
🔥Heating Systems
⚙️Electrical Automation
🔌Frequency Converters / VFD
🚄Rail Transportation HVAC
🏢HVAC (FFU/AHU) Systems
🌫️Air Purification
🚗New Energy Vehicles
🏗️Process Cooling
💻Data Center Cooling
⚡Power Plant Ventilation
🏥Hospital HVAC
🔬Laboratory Ventilation
📡Telecom Equipment Cooling
🔋Battery Storage Systems
🌾Agricultural Ventilation
🚢Marine & Shipboard HVAC
🏗️Cooling Towers
Technical Specifications
| Model Number |
RD31S-4DW.6Q.AL Genuine Article No: 121303 | Motor No: RZ31S-4DW.6Q.AL |
| Manufacturer | ZIEHL-ABEGG Made in Germany |
| Product Type | Centrifugal Fan High Static Pressure |
| Condition | Original new from manufacturer |
| Rated Power | 3.9 kW Heavy Duty Industrial Grade |
| Voltage | 3~400V / 50/60Hz Three Phase |
| Rated Current | 11.0 A / 6.4 A |
| Speed | 1300 rpm |
| Frequency | 50/60Hz |
| Net Weight | 41 kg |
| Shipping Dimension | 50 × 50 × 50 cm |
| HS Code | 8414599099 |
| Country of Origin | Germany |
| Warranty | 1 year manufacturer warranty |
| Ship From | Hong Kong |
| Lead Time | 5 business days |
| Delivery Time | 3-8 business days worldwide (DHL/UPS) |
| Guarantee | 30-day return policy • 100% customer satisfaction |
Engineering Excellence
🛠️ Heavy-Duty German Bearings
Precision industrial-grade ball bearings with high-temperature grease ensure maintenance-free operation beyond 10+ years even under extreme continuous loads.
🔇 Noise-optimized Centrifugal Design
Advanced scroll housing and dynamically balanced impeller reduce turbulence and noise, making it suitable for acoustic-sensitive environments.
⚡ High Efficiency Three-Phase Motor
3.9kW with only 11.0/6.4A current draw delivers exceptional energy savings. Three-phase 400V operation provides stable, efficient power for demanding industrial applications.
💨 High Static Pressure & Airflow
1300 rpm centrifugal design generates excellent air movement for heat dissipation in industrial machinery, cooling towers, and HVAC systems.
🚚 Shipping & Service Guarantee
Shipping From: Hong Kong – efficient global distribution hub.
Processing: Orders ship within 5 business days.
Express Delivery: 3-8 business days worldwide via DHL or UPS.
Genuine Promise: Only original ZIEHL-ABEGG factory-sealed products, meet all fit, form and function specifications.
Warranty & Returns: 1-year manufacturer warranty + 30-day hassle-free returns.
📦 Bulk / Large Quantity Inquiries: Contact [email protected] for volume pricing and custom logistics solutions.
❓ Frequently Asked Questions
Q1: How does this fan achieve over 10 years of reliable operation?
The RD31S-4DW.6Q.AL features heavy-duty die-cast housing, German-made premium industrial bearings, and a thermally protected motor. ZIEHL-ABEGG's rigorous testing ensures it withstands dust, humidity, vibration, and continuous duty cycles beyond a decade.
Q2: Is it quiet enough for commercial environments despite its power?
Yes. Thanks to its precision-balanced centrifugal impeller and optimized scroll housing, noise levels are remarkably low for its 3.9kW power class, making it suitable for commercial buildings and hospitals.
Q3: Why choose three-phase 400V for industrial applications?
Three-phase operation provides smoother power delivery, higher efficiency, and better reliability for continuous industrial use. It's the standard for manufacturing facilities worldwide.
Q4: What cooling performance can I expect for large industrial applications?
The powerful 3.9kW centrifugal design delivers exceptional static pressure and airflow, ensuring superior heat dissipation for cooling towers, industrial machinery, power plants, and heavy-duty HVAC applications under extreme thermal loads.
Need Expert Advice or Volume Discounts?
Our technical team is ready to assist with application matching, performance data, and custom quotations for OEM and industrial projects.
📧 Request Technical Support 💰 Request Volume PricingCustomer Testimonial
"We installed the RD31S-4DW.6Q.AL in our manufacturing plant's cooling tower system, and the performance is outstanding. After 20 months of 24/7 operation, it runs smoothly with minimal noise despite the powerful 3.9kW output. The 11.0/6.4A current draw is incredibly efficient—saving us significant energy costs. The 41kg German build quality is rock solid. Perfect for demanding industrial environments where reliability and energy savings are critical. Highly recommended for heavy-duty cooling tower applications!"
— Thomas Richter, Plant Operations Director
Verified Buyer · Industrial Cooling Tower System · April 2026
* All products are 100% genuine ZIEHL-ABEGG. Specifications are subject to manufacturer updates. Contact us for compatibility check.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.3 ★★★★★
Based on 21 reviews
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Product Reviews
★★★★★ 5
Great buy!
Scent: Palo Santo, Size: 16 Fl Oz (Pack of 2)
This is my favorite brand and the lather is second to none! The smell is amazing and the quality is worth the extra price. It leaves my skin feeling moisturized and soft.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 4, 2026
★★★★★ 5
FINALLY. THIS IS ACTUALLY WHAT YOU WANT.
Scent: Seagrass & Driftwood, Size: 32 Fl Oz (Pack of 1)
I’ve tried all of the soaps. All of them. Molten brown sucks, 18.21 sucks, Blackwood sucks, and brickell sucks.
All I wanted is a premium soap that doesn’t suck. All I wanted is to feel good and smell good. I work in kitchens, so I’m not some desk monkey needing to wash off the stale air, I have to actually clean myself.
I don’t even know how these soaps stay in business, you might as well be using Irish spring and save the money. Nothing moisturizes, I’m always left with dry skin, or the smell lasts all of 6 minutes.
Until now.
This stuff is actually the luxury brand I’m swearing by. It lasts on my skin, it lathers well, it cleans well, and it doesn’t give me itchy skin just to smell nice after a shower.
Also, it doesn’t cost $36 per bottle like molten brown does for 2 teaspoons of soap with gold flakes in it that smells great for 6 minutes. It’s cheaper, and you get more.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on September 14, 2024
★★★★★ 5
Long Lasting Scent
Scent: Bourbon Oak, Size: 16 Fl Oz (Pack of 2)
I've tried dozens of different brands of body washes and have had various objections.
This is the best by far in every metric.
First of all the scent. Bourbon & Oak.
I'm not convinced that it smells like bourbon OR oak. It's definitely a warm musky scent and I would say it tends more towards a creamy spice with a strong low note.
Longevity:
My job is about 50 percent physical throughout the day and I tend to shower only at night when I get home from work. This is the only body wash whose aroma not only lasts through the rest of the evening, but well into late morning the next day. I would even say that physical activity brings out a very smooth and subtle character. This is the first time I've ever been able to smell a body wash the next day. It was surprising and pleasant.
As for moisturizing, my skin feels smooth but without the oily residue that I typically associate with moisturizing products.
If a product lives up to my expectations I tend to leave a simple review and fair rating.
For products like this that exceed my expectations I try to leave a more detailed review that highlights its strengths.
I will most certainly continue to use this brand and experiment with the different scents available.
10/10 would recommend.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 29, 2023
★★★★★ 3
Please do NOT reship items like body soap that have been returned
Scent: Seagrass & Driftwood, Size: 32 Fl Oz (Pack of 1), Scent: Seagrass & Driftwood, Size: 32 Fl Oz (Pack of 1)
So I've purchased this twice now, I love the scent and I love how it lathers up, overall very happy with the produce so long as I get a product that wasn't previously returned. The 2nd order I received, it was clear that someone had replaced the soap in the bottle with some other kind of liquid and returned it and I got it. First off that has to be dangerous and hazardous.
As you can see from the pictures, something is wrong with this product.
The first product I got had a clean scent, was clearly a body soap liquid. The 2nd product I ordered was more water, smelled had virtually no scent at all. Unfortunately I had already poured it into my soap dispenser so it's now not returnable. PLEASE DO NOT SHIP OUT RETURNED ITEMS!! It's dangerous
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 15, 2024
★★★★★ 5
Good soap
Size: 5.3 Ounce (Pack of 4)
It was so good that my friends took some for themselves. Without asking. Bastarts... good deal though, smells very nice! Especially that whisky one. The coarse texture makes for a great clean!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 3, 2026
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