Holyoake Spiro-Flex offers a super lightweight, flexible duct solution that’s both versatile and durable. Fibreglass construction with reinforced aluminised PET foil tape is helically wound to encase a spring steel wire, thus ensuring the duct maintains the correct diameter even in tight bends. The laminated foils encapsulate the wire completely ensuring structural integrity and a safe installation.
The flexibility of the duct makes it an ideal choice for a range of applications, effortlessly conforming to different ducting needs.
Holyoake Spiro-Flex duct systems ensure compliance with the requirements of the New Zealand Building Code. Consequently, meeting the Energy Efficiency – H1/VM3 Clause 5.2.1, and AS 4254.1 including Clause 2.7 for labelling. Testing of the duct has been undertaken against the mechanical and fire performance requirements of Clause 2.4.1.
In the insulated form, Holyoake flexible duct is sheathed with a seamless, flame retardant printed outer sleeve. Moreover, testing in accordance with AS 1530.3 for plain and insulated ducting options with performance for:
- Ignitability,
- Spread of Flame,
- Heat Evolved, and
- Smoke Developed Index.
Additionally, an evaluation for Smoke Production Rate in accordance with ISO 9705 has been conducted to ensure reliability and safety.
SPIRO-FLEX Acoustic Performance
Acoustic ducting utilises perforations in the inner PET foil to increase the inherent attenuation of the duct. As a consequence, acoustic duct relies upon an unpunctured vapour barrier for its leakage performance and site conditions frequently mitigate against this.
