E-1.1, r. 1 - Regulation respecting energy conservation in new buildings

Full text
135. Every heat pump used for heating shall be equipped with controls to prevent the operation of supplementary electrical heaters when the heat pump capacity is sufficient to meet the heating demands. However, during start-ups, thermostat setting or during periods of defrost, the supplementary heating units may be used.
O.C. 89-83, s. 135.