Leading Inline Duct Fan Manufacturer in India
INTELLIFAN is a trusted Indian inline duct fan manufacturer, supplier, and exporter. We engineer advanced mixed-flow and centrifugal inline ventilation systems powered by high-efficiency motors, designed to drive clean indoor airflow across demanding duct runs.
From residential bathroom extraction to commercial kitchen exhausts, basement ventilation, hospital air handling, and hydroponic setups, our duct fans deliver higher static pressure, ultra-quiet acoustics, and reduced electricity bills.
Why Choose INTELLIFAN Duct Fans?
Precision Ventilation by an Indian Inline Duct Fan Manufacturer
Engineered to overcome air resistance and solve static pressure drop across long ducted networks.
An inline duct fan is an aerodynamically balanced ventilation fan installed directly inside circular or rectangular air ducts. Unlike traditional wall-mounted or ceiling exhaust fans that only extract air locally, an inline fan works within the ductwork to move air across extended horizontal and vertical runs without losing airflow velocity.
As a dedicated inline duct fan manufacturer in India, INTELLIFAN addresses the ventilation challenges of modern Indian urban architecture. High-rise residential apartments, compact commercial offices, hotel corridors, and basements often lack direct exterior wall access. Our inline ventilation fans generate the static pressure required to pull fresh air from the outside or force moisture, fumes, and stale contaminants through dozens of meters of duct bends and grilles.
Integrating advanced BLDC (Brushless DC) and high-torque AC induction technology, our duct blowers provide lower energy draw, vibration-damped casing, and multi-speed adaptability for residential, commercial, and clean-room projects.
INTELLIFAN Inline Duct Fan Series
Browse standard industrial and commercial mixed-flow duct fan models built for continuous duty.
100mm Compact Mixed Flow Inline Duct Fan
| Duct Diameter | 100mm (4 Inch) |
| Airflow (CMH / CFM) | 220 m³/h / 130 CFM |
| Motor Technology | High-Grade Pure Copper |
| Rated Power | 26W Low Consumption |
| Noise Level | 28 dB(A) Quiet Run |
| Static Pressure | 150 Pa |
| Speed Control | 2-Speed Switch Compatible |
| Warranty | 2 Years Manufacturer |
150mm High-Capacity Inline Duct Fan
| Duct Diameter | 150mm (6 Inch) |
| Airflow (CMH / CFM) | 540 m³/h / 318 CFM |
| Motor Technology | Dual-Speed AC / EC Option |
| Rated Power | 54W |
| Noise Level | 33 dB(A) |
| Static Pressure | 300 Pa |
| Body Material | Heavy Duty Polypropylene |
| Warranty | 2 Years Manufacturer |
200mm Commercial Inline Exhaust & Fresh Air Fan
| Duct Diameter | 200mm (8 Inch) |
| Airflow (CMH / CFM) | 900 m³/h / 530 CFM |
| Motor Technology | High-Torque Continuous |
| Rated Power | 128W |
| Noise Level | 38 dB(A) |
| Static Pressure | 380 Pa |
| Ingress Protection | IP44 Splashproof |
| Warranty | 2 Years Manufacturer |
150mm Ultra-Efficient BLDC Inline Duct Fan
| Duct Diameter | 150mm (6 Inch) |
| Motor Type | Electronically Commutated (BLDC) |
| Energy Savings | Up to 60% vs Induction |
| Speed Control | 0-10V PWM / Stepless Dial |
| Airflow | 600 m³/h / 353 CFM |
| Rated Power | 38W Max (Variable) |
| Static Pressure | 350 Pa |
| Warranty | 2 Years Manufacturer |
250mm Centrifugal Circular Metal Duct Fan
| Duct Diameter | 250mm (10 Inch) |
| Casing Construction | Powder-Coated Galvanized Steel |
| Impeller Type | Backward Curved Centrifugal |
| Airflow Capacity | 1150 m³/h / 677 CFM |
| Operating Pressure | 510 Pa High Head |
| Insulation Class | Class F Heavy Industrial |
| Thermal Protection | Auto Reset Built-In |
| Warranty | 2 Years Manufacturer |
315mm Industrial High-Pressure Inline Blower
| Duct Diameter | 315mm (12.5 Inch) |
| Airflow Capacity | 1950 m³/h / 1150 CFM |
| Casing Material | Zinc-Coated Anti-Corrosive Steel |
| Rated Power | 240W |
| Maximum Pressure | 720 Pa High Head |
| Application | HVAC Supply & Basement Exhaust |
| Bearing System | Dual NMB Japanese Ball Bearings |
| Warranty | 2 Years Manufacturer |
Inline Duct Fan Engineering Specifications at a Glance
High aerodynamic performance across every standard Indian duct size.
Millimeter Range
Standard circular sizes: 4", 6", 8", 10", and 12" duct connection collars.
Pascals Static Pressure
Overcomes duct bends, internal dampers, reducers, and HEPA filter media drops.
Energy Reduction
Achieved through modern BLDC and EC commutation motor options.
Rated Operating Hours
Precision-sealed ball bearings built for non-stop 24/7 commercial duty.
Why Engineers Choose Our Inline Ventilation Fans
Solving ventilation resistance with mixed-flow aerodynamic efficiency and acoustic dampening.
Mixed Flow Aerodynamics
Combines the high volumetric flow of an axial fan with the static pressure build of a centrifugal impeller, guaranteeing optimal airflow through long pipes.
Acoustically Treated Housing
Streamlined internal guide vanes direct the air linearly, eliminating internal turbulence and drastically lowering operating decibel ratings.
Easy Drop-Down Servicing
The central motor and impeller body detach from the mounting bracket using quick-release latches, allowing maintenance without dismantling ductwork.
BLDC Motor Innovation
Selected models feature brushless DC drive technology that runs cool, tolerates fluctuating Indian voltage conditions, and supports 0–10V automation.
Corrosion-Resistant Enclosures
Constructed using either flame-retardant industrial polypropylene or zinc-coated heavy gauge steel, preventing rust in humid coastal or kitchen environments.
Continuous 24/7 Duty Cycle
Built with class-leading thermal overload protection and sealed Japanese ball bearings to ensure trouble-free multi-year continuous operation.
Understanding Inline Duct Fan Technology
How mixed-flow inline blowers outperform standard axial and propeller fans.
Mixed-Flow vs. Axial Fans
Standard axial exhaust fans push air parallel to their shaft. While great for free-air delivery through a thin wall, their airflow crashes to near zero as soon as they face resistance from an air duct, elbow, or louvre.
INTELLIFAN's mixed-flow inline duct fans redirect air diagonally through curved diagonal blades. This accelerates the air, imparting both radial and axial velocity. As a result, the air retains its CFM rate even through 20+ meters of ducting, multiple 90-degree bends, and air terminal devices.
- High static pressure resilience: Maintains airflow across long ducted corridors.
- Compact inline profile: Fits within shallow false ceiling drops (180mm to 350mm).
- Linear discharge: Avoids eddy currents and minimizes vibration.
BLDC vs. Standard AC Inline Motors
Conventional inline blowers use single-phase AC induction motors with start capacitors that generate heat and waste power at low speeds. INTELLIFAN incorporates advanced BLDC motors with integrated electronic commutation.
A BLDC inline fan runs on converted DC power, generating electromagnetic fields via permanent magnets. This removes rotor copper losses and brush friction entirely, achieving significant advantages for modern green buildings:
- Up to 60% power savings: Drops operating power from 120W to just 40W–50W.
- Stepless Speed Control: Smoothly dial speed from 0% to 100% without electrical motor humming.
- BMS & Sensor Ready: Direct integration with CO2, humidity, and temperature sensors.
Inline Duct Fan vs. Conventional Ventilation Systems
Evaluate how ducted inline ventilation transforms building air management.
| Parameter | INTELLIFAN Inline Duct Fan | Traditional Wall/Window Exhaust Fan | Ceiling Mount Local Exhaust Fan |
|---|---|---|---|
| Installation Flexibility | Anywhere along the duct run, hidden inside false ceilings | Strictly external wall or window pane only | Ceiling face in the immediate room only |
| Static Pressure Generation | High (150 Pa to 720 Pa) for long duct pipes | Very Low (20 Pa to 40 Pa); stalls easily | Low to Moderate (40 Pa to 80 Pa) |
| Noise Level in Living Space | Whisper quiet (fan can be located away from the room) | Loud motor and blade chop audible inside the room | Moderate noise generated directly overhead |
| Multi-Point Extraction | Yes; one inline fan can exhaust multiple rooms via dampers | No; requires a dedicated wall fan per room | No; single-room extraction only |
| Fresh Air Supply Capability | Yes; pulls filtered fresh air from exterior louvres | No; exhaust only | No; exhaust only |
| Energy Efficiency (BLDC Option) | Extremely high with BLDC/EC motor options | Standard inefficient shaded-pole or AC induction | Standard AC induction motor |
Applications of INTELLIFAN Inline Duct Fans
Engineered to satisfy residential, commercial, industrial, and clean-air ventilation demands.
How to Choose the Best Inline Duct Fan for Your Project
Follow this engineering checklist to select the exact model, collar size, and motor power.
1. Calculate Required Airflow (CFM / CMH)
Determine the room volume (Length × Width × Height in meters) and multiply by the recommended Air Changes per Hour (ACH):
- Offices & Living Areas: 4 to 6 ACH
- Residential Bathrooms & Kitchens: 8 to 12 ACH
- Commercial Kitchens, Gyms & Smoking Rooms: 15 to 30 ACH
Total CMH required = Volume (m³) × Recommended ACH.
2. Factor in Static Pressure Drop
Air passing through flexible or rigid ductwork encounters friction. Every 90° bend, backdraft shutter, supply diffuser, and inline filter adds resistance:
- Straight Rigid Spiral Duct: ~1 to 2 Pa per meter
- Flexible Aluminum Ducting: ~3 to 5 Pa per meter
- 90° Elbow / Bend: ~10 to 25 Pa drop each
- Carbon / HEPA Filter Media: ~100 to 250 Pa drop
Choose a fan whose performance curve delivers your required CFM at the calculated total Pascal drop.
3. Select Casing & Motor Type
Choose the right construction based on environmental and architectural parameters:
- Polypropylene Casing (100mm–200mm): Lightweight, non-conductive, whisper quiet; ideal for false ceilings in luxury homes, hotels, and offices.
- Galvanized Steel Casing (150mm–315mm): Heavy-duty fire resistance; ideal for commercial kitchens, industrial sheds, and plant rooms.
- BLDC / EC Motor: Choose for continuous duty setups where energy savings, zero hum, or smart speed sensors are needed.
4. Evaluate Noise & Location
To ensure silence inside living or working spaces:
- Position the inline fan midway along the duct run rather than directly behind the room's ceiling intake grille.
- Use acoustic insulated flexible ducting on the fan's discharge side to absorb residual sound waves.
- Install anti-vibration rubber hangers to isolate structural vibration from the ceiling slab.
Have a Duct Ventilation Requirement? Let’s Talk.
Contact INTELLIFAN for immediate wholesale quotes, product specifications, bulk dealer pricing, commercial HVAC supply, and custom OEM manufacturing requirements.
Manufacturer Support for HVAC Contractors, OEM & Dealers
End-to-end technical documentation, reliable project supply, and private labeling.
HVAC Consultants & MEP Contractors
We work directly with HVAC designers, MEP contractors, interior turnkey firms, and builders across India. We supply certified performance curves, static pressure vs. CFM charts, CAD layout files, and electrical schematics to simplify project sign-offs.
Whether you need 20 units for a boutique hotel or 500 units for a commercial IT park in Bengaluru, Pune, Hyderabad, or Noida, INTELLIFAN provides consistent build quality and on-time project dispatches.
Submit Project BOM for QuoteOEM & Private Label Manufacturing
Looking to expand your HVAC or air treatment brand with inline ventilation equipment? INTELLIFAN provides comprehensive OEM and private label manufacturing services.
From customized airflow ratings, private label brand printing, custom voltage drives, and unique packaging to tailored motor selections, we manufacture products to your precise technical and commercial specifications.
Discuss Private Label PartnershipAbout INTELLIFAN & Greenland Solutions
Made in India engineering excellence since 2015.
INTELLIFAN is a flagship brand of Greenland Solutions, an Indian engineering and manufacturing enterprise established in 2015 with its primary production hub in Sahibabad Industrial Area, Ghaziabad, Uttar Pradesh.
Founded on a deep foundation in high-efficiency DC, BLDC, and AC fan motor engineering, Greenland Solutions has grown into a respected ventilation technology partner for residential, institutional, commercial, and industrial markets across India.
Our complete ventilation portfolio encompasses Inline Duct Fans, Energy Recovery Ventilators (ERV), Fresh Air Ventilation Filtration Units, BLDC Ceiling Fans, Centrifugal Duct Blowers, and Air Distribution Diffusers & Grilles. Every product is backed by stringent quality testing, dynamic impeller balancing, and dedicated pan-India after-sales support.
Frequently Asked Questions About Inline Duct Fans
Clear answers to common engineering, installation, and procurement questions.
Who is the best inline duct fan manufacturer in India?
Ready to Upgrade Your Ventilation? Talk to Our Engineers.
Get in touch with INTELLIFAN for technical sizing support, model recommendations, bulk price quotes, or dealer inquiries across India.
