World leaders are increasingly talking about climate change, the fate of our planet and ecology, and various cross-border eco-agreements on energy saving and fuel consumption are being set up. The directive issued by the Parliament and the Council of the European Union states that, from 2021, Newly constructed buildings throughout the European Union must meet the energy efficiency class of A++. Therefore, in implementing this directive, Member States of the European Union, including Lithuania, are gradually adopting new laws regulating the energy class of buildings.
High-energy efficiency class buildings are also called low-energy consuming buildings. The most important thing in such buildings is well-insulated, airtight walls and minimal quantity of thermal bridges. In other words, the airtightness of the building is important in order to use as little energy as possible to maintain the temperature of the building when outside temperatures are changing.
Due to the entry into force of the aforementioned laws, the myth began to spread that a fireplace, stove, solid fuel boiler or chimney were not compatible with the requirements for buildings of A or higher energy class.
Energy efficient stoves and fireplaces were developed and put on market well before the abovementioned laws came into force. For such fireplaces and stoves, air for combustion is taken from the outside and supplied through chimney ducts. It helps to maintain the required building airtightness.
Numerous buildings with stoves and fireplaces were completed and certified with A or A+ energy efficiency class even before the requirements were enforced. Fireplace or a stove is an alternative heating device when other heat sources are disabled by natural disasters, power outages or other reasons. For instance, a Norwegian energy regulation requires every household to have an alternative heating system independent from gas or electricity supply. To this end, the most commonly used alternative heating appliances are wood or fossil fuel burning stoves or fireplaces. In conclusion it is not neccessary to give up a cozy fireplace to ensure building airtightness.