Additional heating is always required in addition to the picea system. The waste heat from picea is generally not sufficient to heat a house all year round.
picea can be combined with all standard types of heating systems. No matter what is used for heating (oil, gas, wood or electricity): with picea you need less of it.
Heat pumps are particularly suitable for new buildings. Here, the electricity from picea can be used to operate them and create a modern system for CO2-free heating.