Industrial Roof Extractor Fan — Manufacturer & Supplier, India
Vayuvents manufactures heavy-duty Industrial Roof Extractor Fans for high heat load factories, foundries, steel plants, and chemical buildings. 300 mm to 1,800 mm, IS 3588 compliant. Mumbai. Call +91 90961 88703.
An Industrial Roof Extractor Fan is a heavy-duty motorised roof ventilator specifically engineered for high heat load industrial buildings where standard roof ventilators are inadequate. Foundries, steel plants, forging shops, cement plants, and automotive body shops generate extreme radiant and convective heat that must be extracted through the roof at high volume to maintain bearable working conditions below.
Vayuvents heavy-duty industrial roof extractor fans differ from standard roof ventilators in key construction aspects: heavier-gauge cowl and base construction to withstand the thermal cycling and vibration of high-heat industrial rooftops; Class H motor insulation (180°C winding rating) for the elevated ambient temperature at roof level above furnaces; and heavy-duty bearings with extended grease reserves for the high operating temperature.
Available in 300 mm to 1,800 mm throat diameter, providing 2,500 m³/hr to 75,000 m³/hr per unit. Multiple units are typically installed across the roof span to achieve uniform extraction across large foundry and forge shop floor areas.
FRP cowl variants for chemical plant rooftops. Anti-static earthing provisions for combustible dust environments (flour mills, grain silos). Export supply available.
Key Features & Benefits
Class H Motor Insulation
180°C motor winding insulation handles the elevated ambient temperature at roof level above foundries, steel plants, and chemical process buildings.
Heavy-Gauge Cowl
Heavier gauge GI, MS, or FRP cowl and base curb — withstands thermal cycling, vibration, and the mechanical stress of high-heat industrial rooftop environments.
High-Volume Extraction
300 mm to 1,800 mm throat diameter — 2,500 to 75,000 m³/hr per unit — sufficient extraction volume for the highest heat load industrial buildings.
Heavy-Duty Bearings
Extended-grease-reserve bearings rated for the elevated temperature and continuous duty cycle of industrial roof extractor service.
IP55/IP65 Motor
IP55 as standard; IP65 optional for rooftop wet environments — corrosion-resistant motor enclosure for rooftop rain, dust, and chemical vapour exposure.
Anti-Corrosion Options
FRP or SS304 cowl for chemical plant rooftops; marine-grade paint for coastal industrial buildings; epoxy-coated internals for acid fume exhaust service.
Anti-Static Option
Earthing provisions and anti-static impeller for combustible dust environments — flour mills, grain silos, wood processing building rooftop extraction.
IS 3588 Compliant
Performance tested per IS 3588-1987 with test certificate. Heavy-duty construction documented with material certificates.
Technical Specifications
| Parameter | Specification |
|---|---|
| Throat Diameter Range | 300 mm to 1,800 mm |
| Airflow (Free Air) | 2,500 m³/hr to 75,000 m³/hr |
| Motor Power Range | 0.25 HP to 10 HP |
| Motor Insulation | Class H (180°C) for high-heat service |
| Motor Enclosure | IP55 TEFC standard / IP65 optional |
| Cowl Material | Heavy-gauge GI / MS / FRP / SS304 |
| Base Curb Material | Heavy-gauge MS, hot-dip galvanised optional |
| Bearing Type | Heavy-duty, extended grease reserve |
| Power Supply | 415V 3-Phase 50Hz |
| Standards | IS 3588-1987 | IS 4894 |
Airflow Performance — Model Range
| Sr No. | Model | Fan Dia (mm) | Motor (HP/Pole) | RPM | Free Air (m³/hr) | @15 mmWG | @20 mmWG | @25 mmWG |
|---|---|---|---|---|---|---|---|---|
| 1 | MRF-100-96-24 | 610 | 1.0/4P | 1440 | 11,200 | 11,000 | — | — |
| 2 | MRF-150-96-32 | 810 | 1.5/6P | 960 | 17,288 | — | 16,800 | — |
| 3 | MRF-300-96-36 | 910 | 3.0/6P | 960 | 28,110 | — | — | 28,000 |
| Sr No. | Model | Plate Size (A) | B (mm) | D (mm) | C Min (mm) | C Max (mm) | Weight (kg) | Max Motor Frame |
|---|---|---|---|---|---|---|---|---|
| 1 | MRF-100-96-24 | 1800×1065×4mm | 615 | 200 | 400 | 450 | 45 | 80 |
| 2 | MRF-150-96-32 | 2000×1065×5mm | 815 | 200 | 500 | 550 | 60 | 90L |
| 3 | MRF-300-96-36 | 2000×1200×7mm | 915 | 250 | 600 | 650 | 85 | 112M |
- Fan selection based on air at 20°C, density 1.2 kg/m³.
- Fan performance and tolerance as per IS 3588-1987.
Product Images
Where It Is Used
- Iron and steel foundries — cupola and induction furnace building roof heat extraction
- Steel plant bay ventilation — rolling mill, forge press, and casting bay roof exhaust
- Cement plant — kiln bay and clinker building rooftop heat extraction
- Automotive body shop — paint booth adjacent areas and body pretreatment building
- Chemical plant process buildings — high-temperature fume and vapour roof exhaust
- Pharmaceutical API plants — solvent fume dilution through building rooftop
- Forging and die casting buildings — extreme radiant heat rooftop extraction
- Glass manufacturing furnace buildings — heat extraction from furnace bay rooftops
- Aluminium smelting and die casting — high-temperature metal fume roof exhaust
- Shipyard fabrication sheds — welding fume and heat extraction from large bay rooftops
- Power plant boiler house — high-temperature heat extraction from boiler building roof
- Waste incineration buildings — process heat and odour rooftop exhaust
You May Also Need
Wind Turbo Roof Ventilator
Wind-driven turbine ventilator for zero-energy natural roof exhaust.
View Details →FAQs — Industrial Roof Extractor Fan
A motorised roof ventilator is powered by an electric motor — it exhausts a fixed, controlled volume of air regardless of outdoor wind speed or direction. A wind-driven turbo ventilator (turbine ventilator) relies entirely on wind energy and provides no airflow in calm weather. For reliable, consistent exhaust ventilation in factories and industrial buildings, motorised roof ventilators are always recommended over wind-driven units.
For a 10,000 sq m factory with 8 metre ceiling height requiring 6 air changes per hour, the total exhaust airflow needed is approximately 480,000 m³/hr. This requires 8 to 12 units of RV-100-96-1800 (75,000 m³/hr each) or 12 to 16 units of RV-750-14-1500 (55,000 m³/hr each), arranged uniformly across the roof to avoid stagnant pockets. Vayuvents provides free layout and sizing calculations based on your building dimensions and required air change rate.
For standard factory and warehouse use, GI (galvanised iron) sheet cowl is supplied. For chemical plant rooftops with corrosive acid fumes, coastal environments, and food processing plants, FRP (fibre-reinforced plastic) or SS304 cowl and casing are available. The blade material is also matched — aluminium for standard duty, FRP for corrosive service. Please specify the corrosive agent when requesting a quotation.
Standard motorised roof ventilators are rated for normal temperature exhaust service only and should not be used as fire smoke exhaust fans unless specifically designed and certified for that purpose. Fire smoke exhaust fans require high-temperature motor ratings (typically 300°C for 2 hours), smoke-rated bearings, and fire damper integration per NBC 2016 requirements. Vayuvents can supply dedicated smoke exhaust fan variants — please specify if fire smoke extraction is required.
Roof ventilators should be spaced at maximum 10 to 15 times the ceiling height — for an 8 metre ceiling, maximum 80 to 120 metre spacing. They should be distributed uniformly across the roof to avoid stagnant areas and positioned at the ridge or highest roof point where hot air naturally accumulates. Corresponding fresh air supply openings (louvres or supply fans) should be provided at low level on the opposite side of the building.
Yes. For foundry and forge buildings with high heat loads, Vayuvents supplies heavy-duty roof ventilators with Class H motor insulation (180°C winding rating) for the high ambient temperature at roof level in these buildings. The cowl is in MS with heat-resistant paint for the elevated roof ambient. Anti-corrosion and spark-resistant blade options are available for foundry environments.
Contact Vayuvents at enquiry@vayuvents.com or call +91 90961 88703. Share the building dimensions (length × width × height), required air changes per hour, roof type (sheeted, RCC, sawtooth), and any special requirements (corrosion, high temperature, food grade). We will calculate the required number and size of units and provide a layout drawing and commercial proposal within 24 hours.