Calculator
Thermostat setback savings
Estimate how much you could save on heating by lowering your thermostat overnight and while you're away.
Last reviewed November 2, 2026
How we review content
Your details
$
Gas: about 900–1,080 for a typical detached home.
3 °C
8 h
3 °C
9 h
5 days
Your estimate
Estimated heating reduction
7.2%
Estimated annual savings
$79
A smart thermostat automates this and may qualify for a $100 rebate. See our smart thermostat guide.
Assumptions and method
Savings scale with the degree-hours of setback relative to an average indoor–outdoor temperature difference of about 20 °C over the heating season, reduced 20% for recovery and the heat stored in the home's structure.
For heat pumps, the setback counted is capped at 2 °C and reduced further to reflect backup-heat risk. Real results depend on insulation, airtightness and equipment.