Class1 - Results and Experiences Page 31

4. Energy Renovation of Public Buildings with a clear aim

Improving of the energy efficiency of buildings represents a key target area in European countries, since
40% of the total energy consumption in the EU is related to the building sector (European Commission,
2010). This implies, among other things, increasing the energy standard of existing buildings in order to
reduce heat loss through building envelopes and implementing a greater share of renewable energy in
buildings. Additionally, reaching the future EU-targets for CO

-reduction implies an accelerated installation

of renewable energy systems in the Member Countries.

In the Class1 project, Egedal Municipality has been undertaking the energy renovation of 7 municipal
buildings.

The energy renovations encompassed 2 schools: Bækkegårds School and Stengårds School and 5 kindergar-
ten/institutions. The total area renovated is 20,443 m

. The two schools are approximately 8,500 and 9000

m² respectively and the remaining buildings between 500 and 1,000 m². The photos in figure 34, 35 and 36
show the two schools.

Bækkegårdsskolen is from 2002 2004, so it is a relatively new school. The roof and external walls are light
constructions insulated with 250 mm mineral wool.

Figure

29 shows

Bækkegård school

Figure 29. Bækkegårds School

Stengårdsskolen was erected in the years 1970-1978. The external walls are concrete sandwich type walls
with an insulation thickness of 75 mm. The main most costly energy renovation measure is external
insulation with new cover plates on all the external walls, see

Figure 31

4.1. The energy renovation technologies

The energy renovation of the 7 public buildings has been split in two major packages: Package 1 is the
façade renovation of Stengårds School which was designed to give a complete new impression of the
school from the outside. An architectural company has designed the new façade and has been responsible
for the implementation.