The church dates back to 1965 and consumed 80,827 kilowatt hours per year before the renovation. The roof and floor were insulated and old windows were replaced with triple-glazed windows.
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Heat pump instead of heating oil
The oil heating was replaced by a heat pump and the roof was covered with integrated solar modules from 3S Swiss Solar. This reduced the church's energy requirements by 60 per cent to 33,100 kilowatt hours per year.
See also: Fraunhofer ISE develops standardised solution with partners
The perfectly integrated solar system on the south-facing roof generates around 49,300 kilowatt hours of clean solar power every year. This leaves a profit of 16,200 kilowatt hours per year. (HS/mfo)
