Duct Works
Installation, Repair & Lifecycle Execution Services
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HVAC Duct Fabrication and Installation
Ductwork carries conditioned, fresh and exhaust air between the air handling equipment and the spaces it serves. Zenvent Engineering designs, fabricates and installs duct systems in GI, MS, stainless steel, aluminium, FRP and pre-insulated panel for commercial and industrial HVAC projects.
The duct type is chosen by what the air carries and where the duct runs. Rectangular and spiral ducts handle most supply and return air. Exhaust ducts and flare lines remove fumes, heat and kitchen or process air. FRP ducts are used where the air stream is corrosive. Flexible ducts make short final connections to diffusers and grilles, while fabric duct systems distribute air along their length. Once installed, ducts are usually finished with thermal insulation and, outdoors, aluminium cladding.
Related services: HVAC duct insulation, aluminium cladding for insulated ducts, acoustic duct lining.
Duct Work Services
Air Conditioning Duct Work
Supply and return ducts, vents and fittings that distribute conditioned air through a building.
Air Conditioning Duct Work details
Exhaust Duct Work
Ducts that carry stale, hot or contaminated air from kitchens, plants and toilets to outside.
Exhaust Duct Work details
Rectangular Duct Work
Sheet-metal rectangular ducting, the standard choice where ceiling space is limited.
Rectangular Duct Work details
Spiral or Oval Duct Work
Spiral-seam round and flat-oval ducts with low leakage for higher-pressure systems.
Spiral or Oval Duct Work details
Flexible Duct Work
Flexible aluminium ducts for short final connections between main ducts and diffusers.
Flexible Duct Work details
FRP Duct Work
Fibre-reinforced plastic ducts for corrosive fumes in laboratories, scrubbers and chemical plants.
FRP Duct Work details
Flare Lines or Chimneys
Chimneys and flare lines that vent flue gases from boilers, DG sets and process equipment.
Flare Lines or Chimneys details
GI / MS / SS / Aluminium Ducting
Metal ducting fabricated in galvanised iron, mild steel, stainless steel or aluminium.
GI / MS / SS / Aluminium Ducting details
Pre-Insulated (PIR / PUF) Ducting
Lightweight insulated duct panels that combine the duct and its insulation in one product.
Pre-Insulated (PIR / PUF) Ducting detailsFabric & Flexible Duct Systems
Textile air ducts that distribute air evenly along their length in open spaces.
Fabric & Flexible Duct Systems detailsDuct Works: Common Questions
What's the difference between rectangular and spiral ducts?
Rectangular ducts are standard for most commercial applications and easier to install in tight spaces. Spiral ducts offer better structural strength, reduced air leakage, and are ideal for high-pressure systems but may require more space.
When should I use FRP ducts?
FRP (Fiberglass Reinforced Plastic) ducts are recommended for corrosive environments like chemical plants, swimming pools, marine applications, or where moisture resistance is critical. They're lightweight, durable, and won't rust or corrode.