The turning off of heat whenever you leave home may seem like a good way to save energy, but this is not for any heating system.
In some cases, lowering temperatures may help reduce bills, while in others, it is better for warming to function moderately and steadily.
According to recommendations from the US Department of Energy and the British Energy Savings Fund, everything depends on the device you use.
Calda: Fever reductions help save
If the house is heated with a boil, keeping heat burning all day, even when no one is home, it can increase costs. Hence, the thermostat is recommended during hours of distance or sleep.
The U.S. Department of Energy estimates that lower temperatures by about 4 to 6 degrees Celsius per eight hours a day can bring savings up to 10 percent annually in heating and cooling expenses.
Warming the house again does not cancel savings
A common misunderstanding is that the furnace spends more energy when it needs to warm the house once the temperature is down. However, that is not true.
When the temperature inside the home is lower, the loss of heat to the outside environment slows down. This means that maintaining a lower temperature for several hours can bring savings, even if you should warm your home later.
Heat pump: Lasting temperature is more favourable
The situation changes when you use heat pumps, including heating air conditioners.
In this case, large temperature reduction can affect the efficiency of the device and reduce the expected savings. The U.S. Energy Department recommends a moderate and stable temperature, except when a special thermostat is used for heat pumps.
How much temperature should be at home?
The British Energy Saving Fund recommends that the thermostat be decided generally between 18 and 21 degrees Celsius.
According to its estimates, even lower temperatures from 22 to 21 degrees can bring considerable savings during the year.
So before turning the heat off each time you leave your home, first check the type of system you use. What saves energy on one device is not necessarily the most economic solution for another. /Telegraphy/