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Plenums

HVAC plenums are essential for distributing air efficiently in ducted air conditioning and heat pump systems. Selecting the right plenum ensures balanced airflow, quieter operation, and overall system performance.

Our range is designed to suit different indoor unit capacities, making it easy to choose the right option for your installation:

  • Mini Plenums — suited to indoor units up to 4.9kW
  • Standard Plenums — suited to indoor units 5.0kW and above
  • Large Body Plenums — for higher airflow requirements and specialised applications

All plenums are available in multiple configurations, including base units, pre-fitted spigots, and dampered outlets, helping streamline installation while maintaining control over airflow.

Manufactured onsite in our factory, using quality materials, our plenums are built for durability, consistency, and fast installation across a wide range of residential and commercial projects.

Need something specific? We also offer custom plenum fabrication to suit unique layouts and system requirements.

Mini Plenums — For units up to 4.9kW
Standard Plenums — For units 5.0kW and above
Large Body Plenums
Custom & Accessories
List Photos
Code Product Price Min.
Quantity		 Status Quantity
CS300 CS300 Castellated Spigot 300Ø
RRP $22.50
$19.57
  • Initial price : $19.57
  • [ 1 - 49 ] : $19.57
  • [ 50 - 99 ] -3.0% : $18.98
  • [ 100 + ] -5.0% : $18.59
0 Available from Stock
CS350 CS350 Castellated Spigot 350Ø
RRP $24.40
$21.22
  • Initial price : $21.22
  • [ 1 - 49 ] : $21.22
  • [ 50 - 99 ] -3.0% : $20.58
  • [ 100 + ] -5.0% : $20.16
0 Available from Stock
CS400 CS400 Castellated Spigot 400Ø
RRP $25.70
$22.35
  • Initial price : $22.35
  • [ 1 - 49 ] : $22.35
  • [ 50 - 99 ] -3.0% : $21.68
  • [ 100 + ] -5.0% : $21.23
0 Available from Stock
CS450 CS450 Castellated Spigot 450Ø
RRP $27.50
$23.91
  • Initial price : $23.91
  • [ 1 - 49 ] : $23.91
  • [ 50 - 99 ] -3.0% : $23.19
  • [ 100 + ] -5.0% : $22.71
1 Available from Stock
CSD150 CSD150 Castellated Spigot Dampered 150Ø
RRP $28.70
$24.96 		0 Available from Stock
CSD200 CSD200 Castellated Spigot Dampered 200Ø
RRP $31.60
$27.48 		0 Available from Stock
CSD250 CSD250 Castellated Spigot Dampered 250Ø
RRP $34.65
$30.13 		0 Available from Stock
CSD300 CSD300 Castellated Spigot Dampered 300Ø
RRP $38.20
$33.22 		0 Available from Stock
CSD350 CSD350 Castellated Spigot Dampered 350Ø
RRP $41.15
$35.78 		0 Available from Stock
CSD400 CSD400 Castellated Spigot Dampered 400Ø
RRP $43.15
$37.52 		0 Available from Stock
Available from Stock
Castellated Spigot 300Ø CS300
RRP $22.50
$19.57
  • Initial price : $19.57
  • [ 1 - 49 ] : $19.57
  • [ 50 - 99 ] -3.0% : $18.98
  • [ 100 + ] -5.0% : $18.59
Available from Stock
Castellated Spigot 350Ø CS350
RRP $24.40
$21.22
  • Initial price : $21.22
  • [ 1 - 49 ] : $21.22
  • [ 50 - 99 ] -3.0% : $20.58
  • [ 100 + ] -5.0% : $20.16
Available from Stock
Castellated Spigot 400Ø CS400
RRP $25.70
$22.35
  • Initial price : $22.35
  • [ 1 - 49 ] : $22.35
  • [ 50 - 99 ] -3.0% : $21.68
  • [ 100 + ] -5.0% : $21.23
Available from Stock
Castellated Spigot 450Ø CS450
RRP $27.50
$23.91
  • Initial price : $23.91
  • [ 1 - 49 ] : $23.91
  • [ 50 - 99 ] -3.0% : $23.19
  • [ 100 + ] -5.0% : $22.71
Min.Quantity
1
Available from Stock
Castellated Spigot Dampered 150Ø CSD150
RRP $28.70
$24.96
Available from Stock
Castellated Spigot Dampered 200Ø CSD200
RRP $31.60
$27.48
Available from Stock
Castellated Spigot Dampered 250Ø CSD250
RRP $34.65
$30.13
Available from Stock
Castellated Spigot Dampered 300Ø CSD300
RRP $38.20
$33.22
Available from Stock
Castellated Spigot Dampered 350Ø CSD350
RRP $41.15
$35.78
Available from Stock
Castellated Spigot Dampered 400Ø CSD400
RRP $43.15
$37.52