Thermal energy meters are used to measure, and potentially
charge customers for, energy used for heating and cooling
applications in multi-residential and other buildings. To
accomplish this, thermal energy meters measure the quantity of
thermal energy transferred to or from a heat conveying liquid.
Measurement Canada requires that (with some exceptions)
measurement devices used in trade in Canada must be approved types
(meet prescribed specifications) and must be certified when
installed (and periodically thereafter). Until recently, there have
not been any specific requirements for thermal energy meters within
the Weights and Measures Act. However, as
of July 1, 2019, all newly-installed thermal energy meters will
have to be approved by Measurement Canada (terms and conditions are
found here). The new requirements are explained in
Measurement Canada's bulletin titled Implementation of thermal energy meter
requirements. Measurement Canada will publish a list
