The Ontario Building Code | Vibration Isolation Connectors
6.2.3.16. Vibration Isolation Connectors
(1) Vibration isolation connectors in air duct systems shall be noncombustible, except that combustiblefabric connectors are permitted provided they,
(a) do not exceed 250 mm in length,
(b) comply with the flame-resistance requirements of CAN/ulc-S109, "Flame Tests of Flame-Resistant Fabrics and Films", and
(c) are not used in a location where they are exposed to heated air or radiation from heat sources that may cause the exposed surface to exceed a temperature of 120°C.
In Plain Language
Vibration isolation connectors in air duct systems must be noncombustible, except that combustible fabric connectors are permitted under specific limited conditions described in this article.
This is a plain-language summary of the 2012/2017 Ontario Building Code text above, for general understanding only and not a substitute for the Code. Always confirm current requirements against the 2024 edition (O.Reg. 163/24) or a qualified professional before construction.