comes from the word combination that means the use of multiple elements. Combined heating based on multiple sources of energy for heating.
Main sources of energy for heating - gas, electricity, firewood, solar energy.
Combined heating can reduce heating costs.For example, if the central water heating poorly warmed floors.the use of underfloor heating, which are heated by electricity, it is possible to reduce the consumption of thermal energy for the battery.
In rural areas using a combination of gas plus electricity plus firewood.In the context of a country house, you can use a combination of: solar panels, plus electricity plus firewood (fireplaces, solar panels, underfloor heating, water heating).
31 July 2016