What should be taken into account?
Why waste precious energy if nobody is in the house? When we exit the building, temperature will drop by a few degrees in the whole house. Do you know that 1 °C equals 6% energy savings? Automatic temperature reductions in the night and in rooms that aren't inhabited also increase savings. Think how quickly your investment in a smart home will return to you!
The usage of logic functions in a system allows i. e. automatic heating of stairs running to the house, if it is snowing and freezing, so that they are not frozen and pose danger of slipping. Motion detectors and window status sensors, being components of the safety system, about which we will write later, can in turn serve to control light and heating when required. The opening of a window will reduce the target temperature value, and the motion detector can switch on a lamp.
If one has a small bathroom in the house, a wall-sized mirror is probably worth considering to make the room optically larger. That's when thin heating film will come in handy. Installed behind the mirror it will prevent its steaming up, and the cost of 30 hours of heating amounts to just EUR 0,02.
Two types of heating/air-conditioning for a room can be controlled - i. e. radiator together with an air conditioner, with the option of heating - the system will turn on the heater or the air conditioner depending on the outside temperature, choosing which is better to provide comfort and looking to save energy. To this end one needs temperature sensors or a good weather station collecting data on temperature, light intensity, wind strength and precipitation. But we will describe these useful devices in the next part..