DWDI Centrifugal Fans
Atmax Filtration supplies DWDI (Double Width Double Inlet) centrifugal fans for demanding industrial ventilation applications, including automotive paint booths, paint shops, air handling units (AHUs), evaporative cooling systems, fresh air supply, and industrial exhaust systems.
In automotive paint environments, airflow quality is directly linked to paint finish consistency, VOC control, temperature stability, humidity control, and worker safety. DWDI fans provide a practical and energy-efficient solution for these critical HVAC requirements.
What Is a DWDI Fan
A Double Width Double Inlet (DWDI) fan is a centrifugal fan with
- Two air inlets (one on each side)
- Double-width impeller construction
- Single motor drive for both air inlets
This configuration allows the fan to move significantly higher airflow compared to a comparable single-width single-inlet fan while maintaining compact equipment dimensions.
Features of DWDI Fans?
- Higher Airflow, One Motor A double width double inlet design increases airflow capacity by at least 30–40% compared to a standard single-inlet fan — all from a single motor. That means you get the performance boost without the added capital cost of a second unit.
- Lower Capital & Operating Costs Because one motor does the work of what would otherwise require multiple fans, both your upfront equipment investment and your ongoing operating costs come down.
- Reduced Power Consumption Driving higher airflow through a single, efficiently designed motor means less energy is consumed to move the same (or greater) volume of air compared to multi-fan setups.
- Compact Footprint Since you’re not adding additional fan units to hit your airflow targets, DWDI fans take up significantly less installation space.
- Lower Noise Levels The design and operating characteristics of DWDI fans result in reduced noise output, making them a better fit for environments where worker comfort and noise control matter.
- Improved Mechanical Stability & Bearing Life The symmetrical airflow pattern created by drawing air in from both sides balances mechanical and geometrical loads on the fan. This added stability reduces wear and meaningfully extends bearing life.
DWDI Fans for Automotive Paint Booth Applications
Modern automotive manufacturers treat paint shops as highly controlled environmental zones because of the presence of VOCs (Volatile Organic Compounds) and the stringent quality requirements for paint finishing.
Critical HVAC parameters in paint booths include:
- Airflow patterns
- Air changes per hour (ACH)
- Temperature control
- Humidity control
- VOC exhaust management
- Operator comfort and safety
DWDI centrifugal fans are particularly well suited for these environments because they provide high-volume, stable, and uniform airflow, which is essential for maintaining paint booth performance and product quality.
Applications of DWDI fans
1. Automotive Industry
- Paint booths
- Paint shop ventilation
- Flash-off zones
- Drying and curing air systems
- VOC exhaust systems
2. HVAC & Air Handling
- Large Air Handling Units (AHUs)
- Fresh air supply units
- Return air systems
- Exhaust air handling systems
3. Industrial Cooling
- Evaporative cooling units
- Plant ventilation systems
- Process cooling air systems
- Warehouse cooling and ventilation
4. General Industrial Ventilation
- Manufacturing facilities
- Assembly plants
- Packaging plants
- Process ventilation systems
- High-volume low-to-medium pressure air movement applications
If you are designing or upgrading a paint booth, AHU, evaporative cooling system, or industrial ventilation system, our engineering team can help you select the right DWDI fan for your airflow, pressure, and environmental requirements.
For custom DWDI fan sizing, airflow calculations, and complete industrial ventilation system design, contact our engineering team today.
FREQUENTLY ASKED QUESTIONS
Double Width, Double Inlet- Air enters the impeller from both sides, roughly doubling airflow capacity for a given wheel size versus a single-inlet fan.
DWDI draws air from both sides with a symmetrical casing and dual bearing support. SWSI draws air from one side with an overhung impeller. DWDI moves more air at a similar diameter and speed.
Higher airflow per unit size, lower speed for the same duty, balanced axial thrust, quieter operation, and a compact footprint for large-volume needs.
Belt-driven (adjustable speed via pulleys) or direct-driven (motor coupled to shaft, common with VFDs). Shaft is supported by bearings on both sides.
HVAC air handling units, power plant draft systems, cooling towers, dust/fume extraction, tunnel and mine ventilation, and boiler draft applications
Backward curved (efficient, non-overloading), forward curved (compact, lower cost, less efficient), and airfoil (highest efficiency, lowest noise).
Match required airflow and system static pressure to the fan’s performance curve, check motor power against the power curve, and correct for air density if needed.
Routine bearing lubrication, belt checks, impeller cleaning, vibration monitoring, and fastener inspection. Dual bearing support tends to wear more evenly than SWSI.
Mild steel (standard), galvanized steel (corrosion resistance), stainless steel (corrosive/hygienic environments), aluminum (spark-resistant), and FRP (harsh chemical exposure).
Dust buildup, worn/misaligned bearings, loose fasteners, belt wear, or impeller damage. Prevented through cleaning, balancing, and vibration monitoring.
AMCA 210 (performance testing), AMCA 300 (sound), ISO 5801 (industrial fan testing), and ISO 13350 (energy efficiency classification).
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- 2101 Park Ave, South Plainfield New Jersey 07080, USA
- sales@atmaxfiltration.com
- (816) 745-9994
- Mon – Fri : 8:00 AM to 7:00 PM
Atmax Filtration provides high quality dust collectors and accessories and supplies in the entire New Jersey.
For more information talk to us on (816)-745-9994 or write at sales@atmaxfiltration.com