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Thermal metering, also known as heat metering, enables the measurement of energy used for heating and cooling individual units in a multi-residential building. Heat metering represents an emerging market in North America. It is ideally suited to those working with hydronic heating and cooling systems. It is a technology that promotes energy conservation and allows for sharing of energy costs.

HRAI previously reported to members in 2018 that Measurement Canada an agency of Innovation, Science and Economic Development Canada plans to introduce a thermal metering regulation in Canada by 2026. Included in the plans are guidelines on how thermal meters qualify for installation and inspection. 

The timeframe for implementation has been altered. The new version is found in Bulletin V-31—Implementation of thermal energy meter requirements. It updates the timelines that were proposed in the initial consultation, as well as insisting on the use of the exemption provisions found in section 7 of the Weights and Measures Regulations when an unapproved meter is to be used.

Measurement Canada is currently developing alternative service delivery programs to accredit test facilities to perform initial certification. This may also include re-certifications, if requirements to have the meters re-certified are enacted.

Under the Weights and Measures Act the majority of the responsibility falls to the trader (i.e. the person using the meter in trade, which in most cases is the meter owner, but not always). Though some requirements relate to the device owner specifically.

Measurement Canada published the Terms and Conditions for the Approval of Thermal Energy Meters in March, 2018. These requirements are based on EN-1434, OIML R75 and C900. They can be found here. This new standard is expected to be referenced by engineers specifying heat metering systems.

A pilot program to evaluate different types of heat meters in several categories based on flow capacity began in 2018.  Effective March 29, 2019 Measurement Canada announced that no further applications to the pilot program for approval of thermal energy meters are being accepted. Information on the program can be found here.

For more information contact Caroline Czajko @ cczajko@hrai.ca