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Product Description

Spiro-flex is a super lightweight flexible, compressible air duct consisting of fibreglass reinforced aluminised PET foil tape, helically wound to encapsulate a spring steel wire. It can be supplied plain or insulated. In its insulated form it is sheathed with a printed, flame retarded, seamless outer sleeve. This duct has the ability to conform to any desired duct route and its cross section may be deformed.

Spiro-flex does not retain any configuration it is formed to, being of non-metallic construction and has the advantage of compressibility for convenient packaging. A length of three metres of insulated duct can easily be compressed by hand to 300mm and when released after storage, immediately returns to its original length.

Spiro-flex complies with AS4254, “Ductwork for air handling systems in buildings” and with the New Zealand Building Code requirements given in C3: Spread of Fire. The test results for Spiro-flex, both plain and insulated, are: Ignitability 0, spread of flame 0, heat evolved 0 and smoke developed 1. These tests were carried out in accordance with AS1530.3. “Simultaneous determination of ignitability, flame propagation, heat release and smoke release”

Test Certificates
AWTA Textile Testing - Report of Testing, in accordance with AS 4254, Report No.s 7-525654, 7-526643 and 7-528665.
Applied Physics Laboratory (TELARC), Report No.s 97180 and 97181, in accordance with AS1530.3.

Product Specification

Series Spiro-Flex Super lightweight, compressible flexible air duct of fibreglass reinforced aluminised PET foil tape construction; helically wound, encapsulating a spring steel wire. Suitable for use in low pressure HVAC systems.

Complies with AS4254: 2002, AS1530.3 and UL181.

All shall be Series Spiro-Flex as manufactured by Holyoake.

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