HVAC Ducting Systems

Price Holyoake’s HVAC ducting range covers three spiral duct systems — each engineered for a specific installation context. All comply with AS 4254 and are used by mechanical engineers and HVAC contractors on commercial, industrial, and residential projects.

The Spiro HVAC Ducting Range

Spiro-Loc — rigid galvanised steel ducting for main duct runs and high-pressure systems. Available 100–1500mm diameter.

Spiro-Set — semi-rigid aluminium ducting, hand-bendable on site. Suited to VAV connections, retrofits, and exposed ceilings. Available 75–500mm diameter.

Spiro-Flex — flexible ducting for terminal connections and short duct runs. Also widely used in residential HVAC installations, including home ventilation, bathroom extract ducting, and heat pump connections. Compressible, lightweight, plain or insulated. Available 100–500mm diameter.

All products available plain or insulated. Installation per SMACNA and AS 4254.