Fact Sheet Case Study Budapest

Country Hungary
City Budapest
District Lágymányos (11. district)
Climate Continental (Dfb) with warm summers
Type of building The case study is one classroom in in the main building of the Budapest University of Technology and Economics located on the riverbank of Danube. The demonstration area is a 60m2 classroom situated on the 3rd floor facing to the West with traditional double sash windows; the classroom alongside is being used as reference.
Year of Construction 1883 (1909)
Use of building Educational
Classification Traditional building, listed
Type of intervention Building refurbishment: windows upgrading and integration of optimized intelligent indoor climate solutions
Suitability of intervention The intervention consisted in the replacement of two traditional double sash windows together with new ventilation valves on the frames, the installation of new blinds between the glass panels and the installation of an exhaust fan in order to improve the ventilation of the classroom. Intelligent Indoor Climate Solutions were also installed, with the aim of controlling lighting according to occupancy and incoming daylight through luminance and presence sensors, blinds and illumination; operating ventilation through CO2 sensors and controlling heating. Furthermore opening sensors were also mounted on doors and windows lighting, heating and blinds movement control.
Scope of intervention To evaluate the performances of the developed windows and the impact of the intelligent management of lighting and heating through energy consumption differences in the demo and reference rooms.
Installation requirements In order to install intelligent indoor climate solutions, the building should be equipped with a BMS (Building Management System).
Monitoring The monitoring system installed at Budapest has been developed to specifically measure the performance of the newly developed windows. The monitoring of the indoor comfort parameters (air temperature, relative humidity, lux and CO2) and the electrical/thermal energy consumption has been integrated in the Building Management System.


Lágymányos is a dense area characterized by multistorey residential and public buildings, which are examples of early concrete structures. Most of the buildings in Lagymanyos have been constructed at the beginning of the 20th century.

The case study is one classroom of 60 m2 in the main building of the Budapest University of Technology. It is the oldest university in Budapest. Alajos Hauszmann (1847-1926) planned the eclectic main building on the Danube riverbank.

Budapest has a transitional climate that is influenced by the weather of the Transdanubian region (mild and rainy) and the weather of the Great Plain (variable). The climate is generally classed as continental (Köppen-Geiger: Dfb). The daily temperature fluctuation is quite high. The annual average mean temperature is 11.2°C and the yearly rainfall is about 617 mm that consist of two stronger (early summer and autumn) and two dryer periods (middle of winter and early autumn).

The Budapest case study is coordinated by the EFFESUS partner HOR-BER together with Budapest University of Technology, the building owner.