Year built: 1953
Area: 3 260 m² Heated area
Type of building: Military
The building was constructed in 1953 and is currently used by Fininsh military. The building consists of three stories and has a heated area of 3260 m2. The entire building has been rented to the Construction Establishment of Defence Administration and the main purpose of use (50 %) before and after the renovation is to accommodate soldiers. In addition, the building includes teaching and exercise facilities, offices for permanent staff as well as related social premises and storage areas.
The proposed action plan in Step 1 consisted of eight energy savings measures and gave and internal rate of return (IRR) of 5%. The identified energy savings measures were related to the efficiency of the new ventilation systems, improving the energy transfer through envelope, energy efficient lighting and water equipment. Some actions related to moisture control and presence of asbestos was also identified during the process. The estimated total energy saving potential was about 50%.
The renovation work was started at the beginning of the summer 2015. Only five out of eight proposed measures were possible to carry out in Step 2. The follow-up period of Step 3 started in April 2016 and continued until December 2016. During this period the whole building ventilation system was run on full power for indoor climate reasons. Therefore the measured results had to be compared to a prediction model that was matched to the ventilation use during the first year of the building use. The predicted electricity use was close to the measured one and the heat consumption was a bit higher. The estimated total energy use of the building after renovations will be about 116 kWh/m2 yr, which corresponds to about 40 % savings compared to the updated baseline. Also the cost of the package was followed up on general level and it seemed to come close to the estimated investment costs.