Under the use surface (short NUF ) according to DIN 277 , 2016 usable area ( NF ) of a building is understood to mean the fraction of the floor space , which is used in accordance with the purpose of the structure. The usable area does not include traffic areas (VF) such as entrance areas, stairwells, elevators and corridors, technical areas (TF) (heating room, machine rooms, technical operating rooms) and of course not the construction areas (KGF) of the building such as walls and pillars.
The DIN 277 ( base areas and volumes in building - Part 1: Construction ) defined in paragraph 3.1.4, the use area than. The partial area of the net-room area (NRF), which serves the essential purpose of the structure .
For the use of the term in agriculture, see Agricultural land .
Usable area of buildings according to DIN 277 (2016)
According to DIN 277 , the usable areas are divided into seven usable areas and structured according to their functions:
- Living and staying
- Office work
- Production, manual and machine work, experiments
- Store, distribute and sell
- Education, teaching and culture
- Healing and nurturing
- Other uses
- The building usable area is a term from the German Energy Saving Ordinance and is determined by a rough calculation method based on the heated building volume and floor height and serves as the energy reference area size for residential buildings.
- Werner Markus Böhm et al .: Usable area and utility value in right of residence. Austrian law: Determination of the usable area and the utility value from a technical and legal point of view. 3. Edition. 2009, ISBN 978-3-214-12063-4 .