Axial Roof Exhaust Fan

Direct & Belt Drive Configurations: Direct-drive units minimize maintenance requirements by eliminating belts and pulleys; belt-drive units allow adjustable RPM to fine-tune airflow on-site.

Gravity or Motorized Dampers: Integrated butterfly or backdraft dampers prevent outside air infiltration and backflow when the fan is de-energized.

Weather-Resistant Housing: Heavy-gauge spun aluminum or galvanized steel hoods protect internal components from direct rain, snow, and UV exposure.

Bird & Debris Screens: Heavy-duty galvanized or stainless steel mesh guards prevent wildlife and foreign objects from entering the exhaust stack.

Lifting Lugs: Factory-welded lifting eyes on the housing base ensure safe, balanced rigging during crane placement on site.

Air is drawn upward through the intake cone, accelerated across the airfoil or flat-blade axial impeller, and discharged vertically through the exhaust stack.

Housing & Curb Cap: Constructed from 1.5 mm to 3.0 mm marine-grade aluminum (Alloy 3003/5052) or G90 galvanized steel. All structural seams are continuously TIG/MIG welded to ensure absolute waterproof integrity at the roof interface.

Impeller Assembly: Multi-blade impellers utilize cast aluminum or glass-reinforced polypropylene (PP) blades, dynamically balanced to ISO 1940 Grade 2.5 standards to reduce vibration transmission to the building structure.

Motor Mounts & Engineering Practice: Heavy-gauge structural steel motor plates are laser-cut and CNC-formed. To prevent bearing failure-the primary cause of premature roof fan burnout-our motor mounting plates are precision-aligned using laser interferometry to maintain shaft tolerances under continuous high thermal loads.

Manufacturing Plants: Exhausting welding fumes, machine oil mist, and industrial process heat.

Warehouses & Logistics Centers: Relieving thermal stratification beneath metal roofs during summer months.

Commercial Kitchens: Removing grease-laden air (when specified with grease-rated backward-inclined or specialized axial configurations and cleanout ports).

Chemical & Wastewater Facilities: Expelling corrosive gases utilizing specialized protective coatings.

Materials of Construction: 304 or 316 stainless steel for highly corrosive or marine environments.

Coatings: Epoxy powder coating, polyurethane paint systems, or anti-static finishes for explosive atmospheres (ATEX/IECEx compliant components).

Motors: IE3/NEMA Premium efficiency motors, Totally Enclosed Fan Cooled (TEFC), or explosion-proof (Class I, Div 1/2) variants compatible with Variable Frequency Drives (VFDs).

Roof Curbs: Prefabricated self-flashing steel or aluminum curbs with internal acoustic insulation and wood nailers.

Production operations run on CNC laser cutting centers, robotic press brakes, and automated spinning lathes to maintain dimensional tolerances within +/-0.5 mm.

Balancing & Testing: Every completed impeller assembly undergoes computer-controlled dynamic balancing. Finished fans are run-tested on a test bench for current draw, vibration velocity (mm/s), and RPM verification prior to crating.
Quality Standards: Manufacturing processes comply with ISO 9001 quality management protocols. Air performance ratings adhere to AMCA Standard 210, and acoustic performance is measured in accordance with AMCA Standard 300. 

Submit project requirements-including required CFM, static pressure, electrical supply, and quantity-to receive a formal technical proposal, 3D CAD models, and commercial pricing within 24 business hours.