City Hall, Haderslev, Denmark
A flexible waterfront building
A building of this size with large glass surfaces and open floor plans makes it difficult to manage comfort and energy consumption simultaneously. Although the energy statistics were already in a good range, there was still room for improvement.
The challenge began in 2021 when the building was completely redesigned to cut energy waste. Uponor Ecomate was installed to gain actionable insights into heating, cooling and power usage and improve the Town Hall's energy consumption and carbon footprint.
Installation of clamp-on sensors; AI and remote optimisation analysis – gaining meaningful and actionable insights from easy-to-read visualisations to improve the heating and cooling system.
Innovative improvements in an inspirational environment
Electricity consumption was at a high idle level. The ventilation system was active outside of business hours, and the temperature provided by the air heating ceiling was too high.
Heating / cooling
The poor cooling of the district heating system led to very high consumption, and the radiators had to be adjusted on all floors.
The CO2 sensors required recalibration.
The built-up area of the building amounts to 1,472 m2 per all 5 floors. Because of the open architecture, there are no walls to insulate the individual floors.
Based on the findings obtained with our sensors, we estimated that the ground floor requires 100% heating. The remaining 4 floors, however, only require 20%. Using this calculation, the total heating area of 8,600 m2 decreased to 2660.4 m2.
Consequently, the energy consumption dropped from 376,920 kWh per 2660.4 m2 square metre to 141.7 kWh/m2.
Optimisation of the building's heating, cooling and ventilation systems resulted in the following savings:
- 311,084 kWh/year
(combined heating / cooling and electricity)
- € 27,000/year
- 15.8 tonnes CO2/year
- ROI: 3 months
- Weather-dependent heating control enabled a further energy efficiency potential of 15%
Client: Haderslev Kommune
Architects: AART & Zeni Arkitekter
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