Air Conditioning Ducting & Line Set Covers | Star Sparky

Air Conditioning Ducting

Air conditioning ducting conceals and protects the pipework and cabling running between your indoor and outdoor units. Also called line set covers or trunking, ducting gives a split system install a clean, professional finish while shielding the insulated pipes from sun, weather and damage. Ducts are typically made from metal or flexible synthetic materials, but this page focuses on PVC line set covers for split systems. Star Sparky stocks a complete PVC ducting range for installers and DIY buyers across Australia.

Our range covers duct in 80mm and 100mm, the two most common sizes, plus all the parts you need to complete a run. All parts come in two colours which includes White and Beige. These products include straight duct lengths, flat bends and joiners, and wall covers and caps that finish the duct neatly where it enters or exits the wall.

PVC ducting is the practical choice for most installs. It is weather and rust proof, resistant to acid and salt, and far more economical than steel or aluminium, with low maintenance once fitted. The white finish blends in against most walls and eaves, so the install looks tidy from day one.

To plan a run, measure the distance the pipework travels and add the bends and joiners you need at each corner and connection. Finish each end with a wall cap for a clean entry point. The FAQs below cover the common sizing and fitting questions, but you can also call 1300 996 996 for further support.

Scroll through our range now and find the right air condition ducting system for you today!

Frequently Asked Questions

Most residential split system installs use 80mm or 100mm ducting. Choose 80mm for standard single head systems and smaller pipe runs, and 100mm where you have larger pipework or multiple lines to conceal.

When used within HVAC systems, flexible ducting helps support air quality by carrying conditioned air effectively. Measure your line set before ordering.

Air conditioning ducting conceals and protects the refrigerant pipes, drain line and cabling that run between the indoor and outdoor units. In a broader ducting system, air moves through a continuous cycle of distribution and intake.

Well-chosen ducting also supports efficient HVAC system performance. It gives the install a neat finish and shields the insulated pipework from sun and weather damage. Energy Smart Systems enhance reverse cycle air-conditioning efficiency.

For most installs, yes. PVC ducting is weather and rust proof, resistant to acid and salt, and more economical than steel or aluminium while needing very little maintenance, and the right material should also offer temperature resistance to support HVAC efficiency. It is the standard choice for residential and light commercial line set covers.

Different ducting types, including flexible ducting, can suit different HVAC applications, but PVC remains the standard choice for this use. Rigid sheet metal ducts offer optimal airflow for long trunk lines. High thermal resistance insulation is required for ducts in non-conditioned spaces. Flexible ducts are popular for their adaptability in industrial settings.

A typical run needs straight duct lengths, flat bends at each corner, joiners where lengths connect, wall caps at the entry and exit points, and the right fittings. Secure connections and properly sealed ductwork are essential for energy efficiency, ensuring reliable performance.

Leaks can increase energy bills because HVAC systems have to work harder. In broader layouts, round shapes are generally the most efficient because they reduce friction and leakage. Plan the run by measuring the pipe path and counting the corners and connections.

Yes. PVC ducting can be painted to match your wall colour using a primer suitable for plastic followed by exterior paint.

Where insulated ducting is used, it can help reduce energy bills and prevent condensation. An insulated flexible duct can also reduce indoor noise and condensation in a practical everyday setup. The standard white finish suits most walls and eaves without painting.