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Deep overnight setbacks can trigger more backup heat. A stable setpoint often helps a heat pump operate efficiently.
Key decisionDecision: avoid deep setbacks unless your system strategy has been validated.
A different response
A heat pump delivers heat differently from a furnace. After a deep setback, rapid recovery can activate backup heat and reduce expected savings.
The simple setting
Natural Resources Canada recommends moderate setbacks, generally no more than 2°C, or a thermostat that can anticipate recovery. The exact setting depends on the system.
Observe before optimizing
Track comfort, run time and backup-heat use for several days. Change one variable at a time.
Official sources
Updated :
Programs and criteria can change. Always verify the official source before making a decision.