Roof Ventilator Manufacturer & Industrial Roof Exhaust Systems
Designed for continuous exhaust and ambient air management in manufacturing plants, warehouses, and chemical processing facilities, our roof ventilators deliver airflow capacities up to 120,000 m³/h and static pressures up to 1,200 Pa. Each unit features heavy-gauge weatherproof construction, dynamically balanced impellers, and direct or belt-driven configurations tested in accordance with AMCA 210 and AMCA 300 standards. Available in axial, centrifugal, and mixed-flow configurations to handle clean air, moisture-laden exhaust, high-temperature gases, and corrosive industrial fumes.
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![Roof Mounted Commercial Ventilator]()
Roof Mounted Commercial VentilatorCommercial buildings such as office buildings, shopping malls, hotels, and hospitals have completely different requirements for roof ventilation equipment than industrial plants — noise must be low, appearance must be refined, operation...view more -
![Industrial Roof Extractor Fan]()
Industrial Roof Extractor FanThe rolling workshops of steel mills, the clinker cooling sections of cement plants, the coal conveyors of thermal power plants — these heavy industrial locations continuously release large amounts of heat and dust during production,...view more -
![Dehumidifying Roof Exhaust Fan]()
Dehumidifying Roof Exhaust FanIndoor swimming pools, food processing plants, underground parking lots, dyeing and finishing workshops... these locations share a common enemy — high humidity. Saturated water vapor in the air not only makes people feel oppressively...view more -
![Freestanding Industrial Roof Fan]()
Freestanding Industrial Roof FanWhen installing ventilation equipment on a roof, the biggest headache for owners and installers is waterproofing — if the roof opening is not properly treated, leakage in rainy weather is almost inevitable, and repairs are both...view more -
![Block Type Roof Ventilator]()
Block Type Roof VentilatorThe roofs of modern commercial buildings and large logistics centers are no longer dumping grounds for cluttered equipment. Architects and owners increasingly value the neat appearance of roof equipment and its integration with the...view more -
![Centrifugal Roof Extractor Fan]()
Centrifugal Roof Extractor FanWhen roof exhaust is no longer simply "discharge directly outside" but requires overcoming duct resistance, filter pressure drop, or centralized conveyance of fumes/exhaust gases to purification equipment before discharge, the pressure...view more -
![Axial Flow Roof Exhaust Fan]()
Axial Flow Roof Exhaust FanWalk into any large industrial plant or logistics warehouse, and the most immediate sensation in summer is oppressive heat at the top — hot air continuously rises and accumulates beneath the roof panel, yet can hardly escape naturally....view more -
![Axial Flow Roof Fan]()
Axial Flow Roof FanThe axial flow roof fan is a direct ventilation solution installed on building roofs, designed to efficiently exhaust indoor air to the outside along the fan’s axis. Its performance meets AMCA Standard 260, with a rated airflow of 8,000...view more -
![Centrifugal Roof Ventilator]()
Centrifugal Roof VentilatorThe Centrifugal Roof Ventilator is engineered to handle complex ventilation challenges where significant static pressure is required. Unlike axial designs, this roof-mounted unit draws air horizontally into a centrifugal impeller,...view more -
![Block Roof Ventilators]()
Block Roof VentilatorsMeet the Block roof ventilators – a fully integrated, modular ventilation cube designed for modern architecture where a low profile and high airflow are paramount. Its compact, rectangular "block" shape houses an efficient axial or...view more -
![Freestanding Roof Ventilator]()
Freestanding Roof VentilatorThe Freestanding Roof Ventilator, often recognized by its distinctive "mushroom" shape, is a self-contained exhaust solution that requires no additional curbs or complex foundations. Its design centers on independence and structural...view more -
![Modular Roof Ventilator]()
Modular Roof VentilatorThe Modular Roof Ventilator is not just a fan—it's a scalable, engineered ventilation system designed for the world's largest enclosures. A single module delivers 15,000–40,000 m³/h, and multiple units can be combined to move millions...view more
Fan Selection & Configuration Guide
|
Fan Type |
Airflow Range |
Static Pressure |
Drive Mechanism |
Primary Industrial Application |
|
Axial Flow Roof Ventilator |
8,000 – 100,000 m³/h |
50 – 350 Pa |
Direct Drive / Belt Drive |
High-volume general ventilation and heat clearance in open-space production bays. |
|
Centrifugal Roof Ventilator |
2,000 – 60,000 m³/h |
200 – 1,200 Pa |
Direct Drive / Belt Drive |
Ducted exhaust networks requiring medium-to-high pressure across long duct runs. |
|
Mixed-Flow Roof Ventilator |
5,000 – 85,000 m³/h |
150 – 700 Pa |
Direct Drive |
Compact rooftop installations requiring lower sound profiles and balanced static efficiency. |
|
Modular Low-Profile Block Ventilator |
15,000 – 40,000 m³/h |
100 – 450 Pa |
Direct Drive (EC / AC) |
Modular rooftop arrays with height constraints and scalable exhaust demand. |
Materials & Construction Specifications
Housing & Weather Cowls
Fabricated from hot-dip galvanized steel (DX51D+Z275, zinc coating thickness ≥ 275 g/m²), Stainless Steel 304 / 316L for coastal exposure, or Fiber-Reinforced Plastic (FRP) with vinyl ester resin for acid-laden chemical fumes.
Impellers & Aerodynamic Blades
Die-cast aluminum alloy (G-AlSi10Mg), backward-curved carbon steel, or anti-static FRP impellers, dynamically balanced to ISO 1940 Grade G2.5 standard.
Surface Protection & Coatings
Electrostatic polyester powder coating (80–120 µm film thickness) or ISO 12944 compliant C4/C5 grade epoxy paint system for salt-spray and UV exposure resistance.
Weatherproofing & Sealing
Deep-drawn rain cowls, continuous seam-welded base flanges, automatic gravity backdraft dampers, motorized butterfly dampers, and 304 stainless steel bird/insect mesh (mesh size 12mm x 12mm).
Technical Specifications & Performance Limits
|
Parameter |
Technical Specifications |
|
Impeller Diameter |
315 mm to 1,600 mm |
|
Motor Options |
TEFC enclosure; IP55 / IP65 protection; Class F / H insulation; IE3 / IE4 premium efficiency |
|
Standard Motor Voltage |
380V / 415V / 460V, 50 Hz or 60 Hz |
|
Bearings & L10 Life |
Pre-lubricated heavy-duty pillow block bearings; L10 ≥ 40,000 operating hours at design duty points |
|
Explosion-Proof Options |
ATEX / IECEx certified configurations; ATEX Zone 1 / Zone 2; Ex d IIB T4 / Ex d IIC T4 |
|
Anti-Sparking Construction |
Non-sparking copper-ring inlet cones and anti-static impellers |
|
Standard Operating Temperature |
-20°C to +60°C |
|
High-Temperature Emergency Exhaust |
Up to +280°C for 120 minutes; EN 12101-3 compliant |
|
Vibration |
RMS vibration velocity ≤ 1.8 mm/s at motor bearing housing, according to ISO 10816-3 Category I/II guidelines |
|
Sound Pressure Level |
52 dB(A) to 84 dB(A) at 3 m |
|
Noise Control Options |
Optional sound-attenuating curb mufflers for low-noise workplace requirements |
Applications by Industry
Heavy Manufacturing & Metallurgy
Ambient thermal removal and smoke extraction above furnace lines, welding shops, and hot rolling mills.
Chemical & Petrochemical Facilities
Corrosion-resistant FRP and explosion-proof alloy roof fans extracting solvent vapors, acid fumes, and hazardous process gases.
Warehousing & Distribution Hubs
Thermal destratification, air turnover, and moisture condensation prevention along roof trusses and racking structures.
Power Generation & Electrical Substations
Heat clearance in transformer vaults, inverter rooms, and battery banks using non-sparking ventilation designs.
Custom Fan Engineering & Retrofit Capabilities
Roof Curb Adapter Matching
Custom square or rectangular base frame dimensions (400 mm x 400 mm up to 2000 mm x 2000 mm) matching existing rooftop curb footprints during retrofit projects.
Drive Configuration Flexibility
Direct-drive setups for maintenance-free operation, or external motor belt-drive arrangements for high-moisture or high-temperature airstreams.
Building Management System (BMS) Ready
Motors pre-configured with Variable Frequency Drive (VFD) compatibility, PTC thermistors, and integrated vibration sensor mounting pads.
Manufacturing Precision & Quality Assurance
CNC Fiber Laser Cutting
Sheet metal components cut with tolerances within ±0.05 mm to maintain structural alignment and air-tight assembly.
Two-Plane Dynamic Balancing
100% of fan impellers undergo two-plane dynamic balancing on computerized balancing rigs per ISO 1940 (Grade G2.5 balance quality).
Aerodynamic & Acoustic Testing
Airflow, static pressure curves, and noise emission profiles verified on full-scale test rigs in accordance with AMCA 210 and ISO 5801 protocols.
Factory Acceptance Testing (FAT)
Every assembled unit undergoes a 45-minute factory test run checking operating current draw, vibration velocity, bearing temperature rise, and electrical insulation resistance prior to packaging.
Export Packaging & Engineering Documentation
Ocean Cargo Packaging
Fully enclosed ISPM-15 compliant heat-treated plywood crates with internal vacuum foil moisture wrapping and perimeter corner reinforcement.
Engineering Documentation Package
Each shipment includes General Arrangement (GA) 2D/3D CAD drawings, motor test certificates, dynamic balancing reports, operation manuals, and electrical wiring schematics.
FAQ
Request a Fan Selection & Engineering Quotation
Need an engineering review, CAD model, or custom quotation for your ventilation project? Provide your operating requirements to our engineering sales office:
E-mail: nyfji@126.com
Direct Phone / WhatsApp: +86 186 6290 3785
Factory Address: North End of Jiuwei Port Bridge, Nantong City, Jiangsu Province, China
Included with Quotation: Airflow Performance Curves, Dimensioned CAD Drawings, Motor Data Sheets, and Itemized FOB/CIF Commercial Terms within 24 hours.
As one of the leading roof ventilator manufacturers and suppliers in China, we also support customized service with low price. Please feel free to buy discount roof ventilator made in China here from our factory. For quotation, contact us now.
Freestanding Roof Ventilator, Dehumidifier Roof Fan, Axial Flow Roof Fan
