The Ontario Building Code | Hot Water Temperature
9.31.6.1. Hot water temperature
(1) Where a hot water supply is required by Article 9.31.4.3., equipment shall be installed to provide to every dwelling unit an adequate supply of service hot water with a temperature range from 45°C to 60°C.
(2) An electric storage-type service water heater shall have a minimum set storage temperature of 60°C.
In Plain Language
Hot water supplied to fixtures must not exceed the maximum temperature set out in this article, protecting against scalding.
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.