Spiral & rectangular ductwork
Mains, branches, transitions, plenums and fittings to 80″ diameter.
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HVAC
HVAC rectangular & spiral ductwork, process ventilation, rooftops
CAD drawings and barcode ticketing. Every component traceable from shop floor to position on site.
2025Singapore Zoo — ductwork installed
80″Max fitting diameter
13Gauge material capacity
ISO 9001UKAS certified QMS
Fabrication
Fabrication
Auto Fold and CNC forming to 13-gauge. All materials and gauges in stock.
Fittings to 80″ diameter, gored and welded on purpose built machines. Every piece leaves drawn, numbered and labelled.
- CAD generated fabrication drawings for every system
- Custom ticketing with barcode labelling — all parts accounted for
- Auto Fold & CNC forming up to 13-gauge material
- Fittings up to 80″ diameter, to exacting tolerance
- Purpose built welding and assembly machines to gore and weld
- All materials and gauges held in stock
At a glance
Ductwork fabrication capability
| Duct types | Rectangular and spiral ductwork, fittings and transitions |
|---|---|
| Maximum fitting diameter | Up to 80″ (approx. 2,032 mm) |
| Material thickness | Up to 13-gauge |
| Materials stocked | All materials and gauges held in stock |
| Forming | Auto Fold and CNC machines |
| Joining | Purpose built welding and assembly machines — gore and weld |
| Documentation | CAD generated drawings; custom ticketing with barcode labelling |
| Quality system | ISO 9001 (UKAS) QMS; bespoke inspection & test plan; Production Data Record Book |
| Lifting & handling | 6.3 tonne overhead travelling crane in the workshop |
| Delivery | Heavy haulage route 8.5 km from the workshop — no vertical obstructions, up to 15 m wide; barging across South East Asia |
Systems
Systems
Process ventilation
Dust collection makeup air, pneumatic conveying, industrial extract. Fan housings made in the same shop.
Fans & heat control
Fans, housings, supports, modules and associated equipment.
Rooftop HVAC
New units and change-outs. Curb adapters, duct modifications, roofing, start-up.
Spiral ductwork, installed
Large-diameter spiral, going in
Mains, couplings and supports fixed from access platforms.
Recent project
Singapore Zoo
HVAC ductwork installation, 2025.
- Insulated duct mains and risers
- Installed alongside live building services
- Delivered from our Johor Bahru workshop
Ducting work done
Installed on site
Select any photo to enlarge.
Rooftop specialists
Rooftop HVAC
Crane trucks and crews for new units and change-outs.
- New rooftop unit installation
- Like-for-like and upgrade change-outs
- Roof curb adapters
- Duct modifications to suit the new unit
- Required roofing works
- Equipment start-up
Duct insulation & acoustics
Duct insulation
Hot and cold, thermal and A60, sound barrier, in-situ polyurethane foaming, and prefabricated mattresses that come off and back on at each shutdown.
- Mineral wool / rock wool
- Calcium silicate
- Wiremesh slabs
- Isolite Kaowool
- Armaflex
- Personnel protection (PP)
- PU foam
How we work
How a package runs
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Enquiry & take-off
Drawings, materials and programme reviewed and priced.
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CAD drawings
Drawings generated for every run, fitting and support before cutting.
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Fabrication & ticketing
Auto fold and CNC forming, welding, assembly, barcode labelling.
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Inspection
Checked against client requirements, design codes and our inspection and test plan.
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Delivery
To site, Johor Port or Singapore. Barging where needed.
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Installation & start-up
Erected, connected, insulated, started up. Record book handed over.
Have a ducting package to price?
Send the drawings and the programme.