Fujian Diamond · Focused on fan production since 2007

Diamond Request A Quote

Products

HVLS Ceiling FanHVLS Floor FanWall FanHigh Temperature Axial FanDiesel GeneratorAll Products

Industries

Warehouse and LogisticsManufacturing WorkshopsCommercial and Public SpacesAgriculture and Livestock

Solutions

Large Space Destratification and CoolingPortable Spot CoolingHigh Temperature Drying VentilationNegative Pressure Ventilation

Resources

Knowledge CentreMetal Fabrication and Press WorkshopAutomotive Service CentreIndoor Sports HallDairy Barn VentilationSupermarket and Retail FloorTechnical DocumentsAbout DiamondContact
HVLS ceiling fan running above pallet racking in a chemical storage warehouse
HVLS Ceiling Fans for High-Bay Buildings

One Fan Instead of Forty

A single 7.3 m Diamond HVLS fan moves air across up to 1,700 m2 of warehouse floor on 1.5 kW. It replaces rows of small drum fans that each need power, cleaning and replacing.

Industrial Ceiling Fan See All Fan Ranges
Commercial ceiling fan turning above the seating area of a large staff canteen
Commercial Ceiling Fans from 2.4 m

Cooling That Does Not Shout

Under 38 dB at the fan, a 3.7 m commercial HVLS fan covers 330 m2 of canteen, showroom or gym without the noise of a wall of air conditioners.

Commercial Ceiling Fan Commercial Buildings
Large HVLS fans installed over the feed alley of an open-sided dairy barn
Livestock and Agriculture Ventilation

Where HVLS Fans Started

The large low-speed ceiling fan was invented for dairy barns. Diamond builds the same principle for cattle housing, poultry sheds, pig units and greenhouses, alongside wall exhaust fans for negative-pressure ventilation.

Agriculture and Livestock Wall Exhaust Fans
Two HVLS ceiling fans above the main aisle of a paper roll distribution warehouse
Fujian Diamond Since 2007

Fans Built by the People Who Make Them

Blade extrusion, CNC spinning, robot welding, stator withstand-voltage testing and blade dynamic balancing all happen in our own plant in Fu'an, Fujian. That is why we can change a diameter, an angle or a voltage for one order.

Inside the Factory Project References
Since 2007Focused on fan production
2.4 m to 7.3 mHVLS blade diameters
IE5 PMSMDirect-drive motor class
900+Clients served
What We Make

Four Fan Families and One Power Range

Diamond is not a trading desk with a catalogue. We build air movement equipment for buildings that are too tall, too wide or too hot for ordinary fans, plus container gensets for sites with no reliable grid.

  • HVLS ceiling fans from 2.4 m to 7.3 m, driven by IE5 permanent magnet synchronous motors with no gearbox to service
  • High-temperature axial fans rated for 130 C ambient and 98 percent relative humidity inside wood, grain and paint drying kilns
  • Wall-mounted exhaust fans from 480 mm to 1,530 mm for negative-pressure ventilation in workshops, barns and greenhouses
  • Portable HVLS floor and stand fans for bays where nothing can be hung from the roof structure
See Every Product Inside the Factory
HVLS ceiling fan turning above pallet racking in a chemical storage warehouse HVLS Ceiling Fan Direct-drive ceiling fans for buildings too tall for air conditioning to reach the floor. Big movable HVLS floor fan photographed against a plain industrial background HVLS Floor Fan Portable HVLS fans for bays where nothing can be hung and the hot spot moves. Industrial wall exhaust cooling fan shown in an industrial setting Wall Fan Negative-pressure ventilation for buildings with a process heat, fume or humidity load. High temperature axial fan range photographed in the Diamond factory High Temperature Axial Fan Four ranges rated for 130 C, 98 percent humidity, and in the CBF case for Zone 1 and Zone 2.
The Full Range

Ten Products Across Five Ranges

Every product Diamond makes, with the real specification on each page and TBC written where a figure has to be confirmed at quotation rather than guessed.

Who We Serve

Four Kinds of Building Keep Coming Back

Two HVLS ceiling fans above the central aisle of a paper roll distribution warehouse Warehouse and Logistics The defining feature of a warehouse is a high ceiling, and it is exactly the feature that makes it... Stamping press workshop with HVLS ceiling fans above the production lines Manufacturing Workshops A workshop that runs too hot costs more than comfort. Above the normal range, people are prone to heat... Commercial HVLS ceiling fan above the seating area of a large staff canteen Commercial and Public Spaces In a commercial room the fan is part of the product. People who are too hot leave sooner, buy less and... HVLS fans installed over the feed alley of an open-sided dairy barn with cattle feeding Agriculture and Livestock The large HVLS fan was originally invented to ventilate and cool livestock, and dairy farming is still...
What We Solve

The Four Complaints That Bring Buyers Here

Air movement is bought to fix something specific. These four are the ones we hear most often, and each one points at a different product.

1

Air conditioning cannot reach the floor

In a building with a 9 m roof, cooled air stratifies and sits high. HVLS fans push a wide column of air down and out, so the temperature your people feel drops without lowering the air temperature at all.

2

Fifty small fans cost more than one big one

Drum fans cover tens of square metres each, so a large plant ends up with hundreds of them, hundreds of motors to maintain and a floor full of trip hazards. One HVLS fan covers up to 1,700 m2.

3

Standard motors burn out in a drying kiln

At 130 C and 98 percent humidity an ordinary motor fails within a season. Our axial fans use H-class 180 C insulation, all-copper windings, aluminium housings and Japanese high-temperature grease.

4

Explosive atmospheres rule out normal ventilation

CBF fans carry ExdIIBT4 marking to GB3836.2 and IEC 60079 so they can run in Zone 1 and Zone 2 areas of refineries, chemical plants and laboratories.

Solutions

From Building Survey to Commissioned Installation

Four routes through the same factory, depending on whether the job is a high-bay building, a bay that moves, a drying kiln or a hazardous area.

1

Own production line

Laser cutting, CNC spinning, robot welding, housing finishing and spray line are in house, so a non-standard diameter or blade angle is a scheduling question, not a sourcing question.

2

Every fan is tested before it ships

Stator withstand-voltage testing and blade dynamic balancing are fixed steps on the line, not sampling.

3

Voltages built to your grid

Axial fans are wound for single-phase 220 V or three-phase 220 / 380 / 660 V, 230 / 400 / 690 V and 240 / 415 V at 50 or 60 Hz.

4

One HS code, one shipper

Axial fans ship under HS 8414599099. Mixed orders of ceiling fans, exhaust fans and spares consolidate into one container from Fujian.

Why Buyers Stay

What You Get From a Factory Rather Than an Agent

Blade extrusion, CNC spinning, robot welding, stator testing and blade balancing happen on our own line. That is what makes a non-standard diameter a scheduling question rather than a sourcing question.

See the Production Line
Trust Centre

The Machines Behind the Specification

The production and inspection equipment on our line, photographed in the Fu'an plant.

Laser Cutting Machine on the Diamond production line in Fu’an Fujian
Laser Cutting Machine — Housing rings, mounting brackets and motor plates are cut from sheet here, which keeps the hole pattern consistent between batches.
Automatic CNC Spinning Machine on the Diamond production line in Fu’an Fujian
Automatic CNC Spinning Machine — Fan housings and bell mouths are spun rather than rolled and welded, so the inlet profile stays round and the airflow stays attached.
Welding Manipulator on the Diamond production line in Fu’an Fujian
Welding Manipulator — Housing and flange welds are run on a manipulator, which holds the same heat input along the full seam.
All Twelve Stations
Project References

Buildings Where These Fans Are Running

Knowledge Centre

Work Out the Answer Before You Ask for a Price

All Guides and Articles
Questions

Frequently Asked Questions

It follows the clear height and the obstruction layout more than the floor area. Under about 6 m of clear height a 2.4 m to 3.7 m commercial fan is usually right. Above 6 m, and where racking or cranes break up the space, the 3 m to 7.3 m industrial range works better. Send us the building length, width, clear height and the position of any crane rails or racking and we will mark up a layout.

Both. Single units and sample orders are accepted, and mixed pallets of ceiling fans, exhaust fans and spares can be consolidated into one shipment. Tell us the quantity and destination port and we will quote the freight alongside the goods.

Axial fans are available single-phase 220 V and three-phase 220 / 380 / 660 V, 230 / 400 / 690 V and 240 / 415 V, at 50 or 60 Hz. Tell us the grid voltage on site and the motors are wound to match rather than shipped with a transformer.

Installation usually takes one to two working days per building and can be done with a scissor lift by two or three people. The fans mount on cement beams, I-beams and square steel structures, and a pole mount is available where there is no ceiling structure above.

The industrial and commercial HVLS fans use a direct-drive permanent magnet motor with no gearbox and no oil change, which is why they are quoted as free-maintenance with a 20-year service life. Periodic work is limited to cleaning the blades, checking fixing bolts and inspecting the wiring at the junction box.

Yes. Blade colour, housing colour and nameplate branding can follow your specification on production orders. Confirm the artwork before the spray line is scheduled, because repainting after the fact adds a full cycle to the lead time.

Send Us the Building and We Will Send Back a Layout

Length, width, clear height and grid voltage are enough for a fan count, positions and a price in the first reply.

Message Us on WhatsApp Email the Factory