Background

St. Cyril and Methodius Secondary School No. 1 is located in the centre of the town of Smolyan in Bulgaria. The school building is a solid-frame brick structure that was constructed in two phases in 1967 and in 1985. The school building consists of several units, connected by warm links. The whole school is heated by a common heating system. There are two gyms, a ceremonial hall, a canteen and several workshops.

The wooden joinery of the school was worn out, with many broken windows. The heating distribution system had almost no insulation. The lighting in the classrooms was substandard and the luminaries installed were old and inefficient.

Building details
Type of building	Secondary school
Year built/ Floor area/ Operating hours	The western wing of the school was built in 1967 and the central part in 1985. The total floor area is 8,748 m2 and the school is open 60 hours a week form Monday to Friday, from 7:30 a.m. to 7:30 p.m.
Heating and cooling installed	Heat supply is provided by a light-oil fuel boiler. The boiler was installed in 2002 and is still in very good condition. It has an automatic control for the combustion cycle.
Energy label/ CO2 emissions	The rehabilitation of the building and the implementation of the energy efficiency measures defined by the detailed audit led to the improvement of the building’s energy performance. The Display® rating for energy consumption moved up from Class B to Class A, however the CO2 emissions rating remained the same at Class B. Unfortunately the water rating dropped one class to C, which is an indication that the school’s management should now focus on reducing water consumption. _ 2005: - Energy (kWh/m2/year): B (89)  CO2 (kg/m2/year): B (23)  Water (l/m2/year): B (183) _ 2006: - Energy (kWh/m2/year): A (67)  CO2 (kg/m2/year): B (17)  Water (l/m2/year): C (251)

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Project description
Aim	The aim of this project was to improve the comfort of the classrooms by reducing cold air infiltration; reduce the cost of space heating and improve the lighting in the classrooms to bring it up to the recommended standard. _ At the same time, a large-scale, national programme for the modernisation of schools’ lighting systems was underway, and St. Cyril and Methodius Secondary School No. 1 in Smolyan took part in this programme.
Key points	An energy audit of the school, undertaken by a Bulgarian auditing company, highlighted three areas where energy efficiency measures could be implemented: - Replacement of joinery. The wooden window frames of the school class rooms and the metal entrance doors were replaced with PVC double-glazed windows, with U-value 2.00 W/m2К, which reduced cold air infiltration to 0.6 h-1.  Heat distribution network. Heat losses were reduced by insulating the pipes and installing stop valves. These measures reduced heat losses from the distribution network to 5%, improving the efficiency of the heating system and reducing fuel consumption. _ Replacing the wooden window frames and reducing heat losses from the distribution network reduced energy consumption from 161.1 kWh/m2 per year to 119.9 kWh/m2 per year at an annual benchmark of 121.6 kWh/m2. _ _ _ The school’s lighting system was upgraded by installing energy efficient luminaries. This was part of a large-scale, national programme, funded by the Ministry of Education. Smolyan Municipality took advantage of this programme and began to modernise the indoor lighting systems in all 40 schools in their territory.
Reason for inclusion as Shining Example	_ The example of St Cyril and Methodius school and all of the work that the Smolyan municipal administration has done so far demonstrates the will of the municipal council to save energy and to show to the local community the importance of these issues. For the next year the municipal’s energy program includes: - Weekly information days on energy issues  The development of a special booklet “Use energy saving it” addressed to all inhabitants of the municipality with a special section for children and pupils  Publication of periodic editions with information about energy efficiency materials and companies working on energy issues.  A broad Display® awareness raising campaign _ The municipality’s policies on promoting energy efficiency are expressed in their three year municipal energy programme. 5.25% of the municipal’s budget is allocated to their energy programme.