Price Holyoake Flexible Ducting - SPIROFLEX

SPIROFLEX is a super light weight flexible, compressible air duct consisting of two layers of 44 mm wide polyester tape, one metallised, helically wound to encapsuate a spring steel wire. It can be supplied plain or insulated. In it’s insulated form it is sheathed with a printed, opaque white, flame retarded, seamless outer sleeve. This duct has the ability to conform to any desired duct route, and its cross section may be deformed.

Spiroflex 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 300 mm, and when released after storage, immediately returns to its original length. Spiroflex is not self-supporting over its length and without adequate fixing ties, can move with changes in pressure. It should not be used on VAV diffuser connections where branch duct pressure may fluctuate, nor should it be used as high pressure (inlet) ducting to VAV boxes or other pressure reducing devices. Spiroflex complies AS4254: 2002 “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 Spiroflex, 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 A.S. 1530.3 - 1989 “Simultaneous determination of ignitability, flame propagation, heat release and smoke release”.

Test Certificates

AS4254 Report of Testing – AWTA Textile Testing

Report No. 7-525654, 7-526643, 7-528665

Applied Physics Laboratory (TELARC) No’s 97180 & 97181