The Ontario Building Code | Freeze Protection for Fire Protection Systems
9.10.20.5. Freeze Protection for Fire Protection Systems
(1) Equipment forming part of a fire protection system that may be adversely affected by freezing temperatures and that is located in an unheated area shall be protected from freezing.
9.10.21. Fire Protection for Construction Camps
9.10.21.1 Requirements for Construction Camps
(1) Except as provided in Articles 9.10.21.2. to 9.10.21.9., camps for housing of workers shall conform to Subsections 9.10.1. to 9.10.20.
In Plain Language
Fire protection systems must include freeze protection as set out in this article, since a frozen sprinkler or standpipe system would fail exactly when it's needed most.
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.