Energy saving through window service

Purpose of the work 
Windows are positioned / adjusted before occupants moving into a building. Their settings may change due to their daily use and mechanical or other impacts during their service life. A window service readjusts the windows. 
The project investigates potential savings in terms of air infiltration and energy savings as such. The investigation is carried out in single-family dwellings and condominiums. 20 dwellings will be measured during the project. 

Method of approach 

Air flow is measured before and after window service, using airtightness tests. The resulting difference is used to calculate ventilation loss savings per square meter of energy reference area or running meter of the window seal. 

Content of the contribution

• Air flow difference is determined for each object.
• Results are based on square meter of energy reference area / running meter of window seal.
• Final energy savings, taking into account the heating system.
• Cost savings per year and payback period.

For further information please contact Beda Bossard at: beda.bossard@hslu.ch