If your home has a central heating system, chances are it also has an economy or ECO button on the thermostat. This button puts the thermostat into energy-saving mode, which can save you money on your heating bill.
In most cases, when you press the ECO button, the thermostat will lower the temperature set point by a few degrees. For example, if your thermostat is set to 68 degrees, pressing the ECO button might lower the set point to 65 degrees. This can save you money because your heater won't have to work as hard to maintain the lower temperature.
Of course, you'll still want to be comfortable, so you may need to experiment a bit to find the right balance. Start by turning on the ECO button and see how it feels. If it's too cold, you can always turn the temperature back up. But if it's just right, you'll be saving money on your heating bill all winter long!