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This mandatory one-day training course, delivered by HRAI on behalf of the Ontario Power Authority (OPA), covers the importance of best practice installation for energy-efficient equipment and is based on the CSA C273.5-11 Standard “Installation of Air Source Heat Pumps and Air Conditioners” and focuses these six key installation factors directly affecting system efficiency: proper duct design and sealing, system sizing, accurate coil matching with condensing unit, correct airflow over indoor coil, correct refrigerant charge, and complete commissioning.