Why talk energy design?
The energy design of a building is the basis for its expected future dependency on fuel resources and consequently a considerable part of the expected future running costs. When building costs are discussed the argumentation is commonly limited to construction costs. With an increasing relevance of energy prices and more and more investors asking for certified buildings, operation costs and even costs for deconstruction become more and more relevant. Depending on the specific building parameters such as usage type and location, future costs can make up to 80% of the total lifetime costs of a building.
A smart energy design does not only consider minimised heat loss via the building envelope so that very little energy supply is needed in operation, it also seeks to make best use of the building geometry, its thermal mass and how solar energy is efficiently made available for the building users.