Annex: Library of best practices template
Country
Spain
Entity
Granollers City Council
Location
Granollers, Barcelona area
Identification of the
Best Practice
Improved installation of indoor lighting efficiency criteria in a municipal school
Main area
Energy Efficiency in Buildings
With the aim of contributing to energy efficiency, reducing emissions and saving energy and
money at municipal facilities in Granollers the “Municipal School of Work” has done an
action to improve the installation of indoor lighting of this center..
Summary
Target Group
This reform has included: the substitution of existing lighting in several areas for the new
recessed ceiling lights with LEDs; the substitution of fluorescent tubes in classrooms with
new tubes LED’s, keeping the light, but canceling ballasts; the installation of movement
sensors and light sensors for automatic turn-on of indoor lighting in common areas,
corridors and classrooms.
Director and manager of school (in terms of improving the school economical budget)
Professors, pupils and other users of school spaces (in terms of improving school indoor
comfort)
Granollers City Council (in terms of saving energy, reducing% GHE and the costs of energy
supply school.
The actions done per school areas are :
Description

Corridors: substitution of 24 fluorescent lights of 4x36 W with a consumption of 198 W
each, per 33 LED lighting with a consumption 26 W each; substitution of 8 lights of
2x36W with a consumption of 101 W each, per 8 units of tubes LED's with a
consumption of 38 W each.

Classrooms: substitution of 644 fluorescent tubes per 765 tubes LED’s with a power of
19 W each. Measured consumption of an old light of two tubes of 36 W was about 101
W, while the present consumption per new light is about 38 W.
In addition, the school has installed heating with natural gas boiler in the library, in
substitution of 6 old electric heaters with a power of 2000 W each, and a system of air
conditioning in the auditorium and offices of the old building to improve the indoor comfort.
Date
Implementation
approach followed
2012
a) Steps: analysing electrical consumption from indoor lighting; benchmarking the
cost and energy saving from existing lighting per new lighting energy less
consumer; implement the substation of lighting; measure and monitor the present
electrical consumption to assure the energy saving.
b) Stakeholders involved: school Director’s, City Council energy manager, lighting
installation company.
1
Economic aspects
Initial investment:
Total savings:
ROI:
43.720 €
10.930 €/year
4 years
Total electricity consumption before action: 107.069 kWh/year
Total electricity savings:
60.727 kWh /year
Total GHG emissions savings:
16,21 tCO2eq/year*
Results
* Own calculation from the GHG emission calculator of Catalan Office for Climate Change,
2012.
Risks/Difficulties
Initial investment capacity of different public buildings; ROI; difficulties in analyzing power
consumption from lighting.
Photos
Contact Person
Mr. Carles Borrell, school director.