It’s generally not cheaper to leave the heat on all day. Heating systems are designed to be used only when needed, and running a heating system continuously can waste a lot of energy and increase your heating costs. Instead of leaving the heat on all day, it’s usually more cost-effective to set the thermostat to a lower temperature when you’re not at home or when you’re sleeping, and to use a programmable thermostat to automatically adjust the temperature throughout the day. This will help save energy and reduce your heating costs.
