Keep in mind that you do not need to always have the heating at the same temperature. In fact, there can be a significant difference between, for example, day and night. Adjusting the temperature well can allow you to save money each month by keeping your home acclimatized during the winter.
Heating temperature when leaving
If we speak in general terms, we can say that the ideal is to keep the home at about 19-20 degrees during the day, in order to save as much as possible. You don't need to have the house at 23 or 24 degrees, for example. That will make you spend more, since an increase in the 7% for each grade.
Now, if you are going to leave the house you do not need to have the temperature of the house at 19-20 degrees. You also don't want the temperature to drop too much, since then you will consume more when heating it again. Therefore, the ideal is to set the thermostat to 15 degrees. At least, that's what IDAE indicates. They assure that it is the optimal temperature when we are going to leave the house.
Therefore, if you have the heating set to 19 degrees as usual, you would have to lower it by 4 degrees when you go outside. Depending on where you live and the insulation of your home, the temperature may never drop below 15 degrees until you return home. There is always what is known as residual heat.
At night, the same
You should also turn the heating on. 15 or 16 degrees at night. You can sleep perfectly at that temperature and you will avoid overconsuming. You will not need to have the house at those 19 or 20 degrees that you will have during the day. In addition, you will have rooms where you could even keep them at a lower temperature or turn it off.
Something you can do is schedule the heating for hours. This way, you could increase the temperature a little before you wake up, so that the house is more acclimatized. You could do the same at bedtime, since you could lower it to 15 degrees a while before. The temperature is not going to plummet, but rather it will be something progressive.
The ideal is that at night you try to improve the thermal isolation. For example, a good idea is to lower the blinds. This way, you will prevent cold air from entering from outside. Anything that can keep your heating warmer for longer will save you energy and pay less on your bill each month.
In short, if you are going to leave the house for a long time and you have the heating on, it is best to lower it to 15 degrees. That will help you save money. Any small detail can make you spend less and just a degree of difference can mean an expense or saving of around 7%.