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ESCO partnership brings environmental benefits to a small municipality


After the local election in 2003 the newly elected municipal administration of the town of Krivodol, with the support of the Municipal Council, adopted a policy for energy saving and environmental protection for the benefit of the local community. The Mayor supported by his deputies and the Council were aware of the serious tasks they were undertaking. This is the reason why they decided to rely on professionals to solve their problems with energy bills and indoor comfort of municipal sites and made a decision to organise a bid for energy efficiency projects.

This shining example showcases the renovation of a kindergarten and nursery building. The building is a solid-frame brick structure. Prior to the implementation of the energy efficiency measures the joinery was wooden. The existing heating installation comprised a local naphtha-fueled boiler house. The low efficiency of the heating system used to lead to high electricity consumption and high operating costs.

Building details

Type of building: Kindergarten and nursery
Year of construction The building was constructed in 1974 with a floor area of 877 m2. The kindergarten is open for 60 hours from Monday to Friday, from 7:30 a.m. till 7:30 p.m.
Heating and cooling installed _ The building is heated by a wood-fired pyrolyse boiler.
Energy label/CO2 emissions This project successfully reduced energy use and associated CO2 emissions. This can be seen by the improvement in the Display® rating for CO2, but not for energy consumption, because the reduction in energy use was not enough to move up a class:

_ 2004:

- Energy use: B
- CO2 emissions: C
- Water use: D

_ 2005:

- Energy use: B
- CO2 emissions: A
- Water use: D

_ At the end of the first reporting period (September 2005), after the implementation of the recommended measures, electricity consumption was reduced to 77 kWh/m2/year and the building got class B according to Display® Classification while the CO2 emissions reached Class A. The water consumption was still Class D or 424 L/m2/year which showed that the municipality had to focus its attention on reducing water consumption, which it intends to do.

Project Description

Aim In 2004 the Municipal Council after a bid decided to appoint the Bulgarian engineering company Enemona SA, experienced in the implementation of energy efficiency projects, to audit several municipal buildings and to implement the selected (by the municipality) measures proposed after the audits, on the basis of an ESCo contract. The aim was to improve the conditions in several buildings, saving both energy and money and protecting the environment. One of the buildings selected for improvement was the Slaveyche Child Care Establishment.

_ The Slaveyche Child Care Establishment (nursery and kindergarten) is located in the town of Krivodol. It is a solid-frame brick building of 877 m2 floor area, built in 1974. The building consists of premises related to the main designation of the site and a basement where a laundry, a kitchenette, a boiler house and a utility room are located. Part of the basement was not heated and there was no ventilation system. Most of the windows had wooden frames with double glazing. The roof of the building is sloped with an unheated and non-functional attic with small ventilation openings. The floor of the building is made of steel-concrete without insulation. The poor state of the building envelope and the in-house heating system were the main reasons for the low energy performance of the building and the low comfort level of building users.

_ In order to maintain an acceptable indoor temperature in the Slaveyche Child Care Establishment building, the required energy consumption totalled 232 MWh. The quantity of heat energy produced by combustion of industrial gas oil was estimated at 202.8 MWh/year, with an additional 15 MWh/year needed for domestic hot water heating, i.e. the total normalised consumption of industrial gas oil amounted to 18.83 t/year. The annual consumption of electricity was 16 MWh/year, including 5.2 MWh for water preheating in summer and another 1.7 MWh for outdoor lighting. The energy performance of the building with respect to space heating was 159.6 КWh/m2year, which exceeded by far the requirements for obtaining the national energy efficiency certificate.
Key points After the detailed audit performed by the Enemona AS company, several key energy saving measures were identified, of which the following were implemented:

- Replacement of the entire joinery of the site with new PVC and AL joinery with interrupted thermal bridges and double glass packages with one low-emission K-glass.
- Replacement of the existing industrial gas oil-fired boiler with two new pyrolise boilers using wooden briquettes. Automation of heat supply in the building.
- Additional 5 cm thick insulation was applied on the internal side of the building envelope walls.
- Additional heat insulation of the roof.
- Improvement of the space heating system and installation of thermostatic valves on the radiators.
- Replacement of incandescent bulbs with compact florescent lamps.

_ The renovated building was opened at an official ceremony with the participation of the children, the parents, the Mayor, members of the municipal administration and representatives of the local media. The measures that have been implemented were announced and the targets that the municipality was pursuing explained. The Mayor reported that this project is a good example of the effectiveness of energy conservation measures because it aims to achieve significant results with respect to saving energy resources.

_ Monitoring of the building’s energy consumption after implementation of the energy efficiency measures showed that consumption has been reduced by about 50% - from the initial consumption of 232.12 MWh/year (183 kWh/m2) prior to implementation of the energy saving measures, to 117.93 MWh/year (93 kWh/m2) afterwards.
Reason for inclusion as Shining Example This project demonstrates how the administration of a small municipality with 11,027 inhabitants had the courage to undertake serious step towards saving energy and improving the comfort for building users in municipal sites. The project was funded through an ESCo contract, thus achieving significant benefits for the local community. The same financial scheme was used by the municipality to extend the established public-private partnership to other municipal sites thus providing a good example to other municipalities.


Costs &


The total cost of the project was €61,500 (BGN 123,000). The funding was provided by the Bulgarian company Enemona AS on the basis of an ESCo contract with the municipality. The payback period for the project is 4.8 years.
Benefits The project is a good example of the effectiveness of energy saving measures because it has achieved significant results with respect to saving energy resources. Energy consumption has been reduced by about 50% - from the initial consumption of 232.12 MWh/year (183 kWh/m2) prior to implementation of the energy saving measures, to 117.93 MWh/year (93 kWh/m2) afterwards. The environmental benefit is the reduction of CO2 emissions by 95.7 t/year, thanks to the replacement of the space heating system.

_ The improved conditions in the building became the starting point for a change in the attitude of both the children and their parents to the notion of “energy cost saving”. The project convinced parents and children in practice that it is possible to simultaneously improve the conditions of habitation of the building and reduce energy consumption.

_ The good results also gave the municipal administration the stimulus to go on and include other municipal building retrofits in their next annual Municipal Energy Plans and to organise broader campaigns to raise the awareness of the local community in energy saving issues.

Partnership details

Partners & Roles The project was realised thanks to the strong partnership between the municipal administration and the Bulgarian company Enemona AS that has 17 years experience in providing different kinds of consultancy services and third party financing.

_ The Municipality of Krivodol is a member of the Bulgarian Municipal Energy Efficiency Network EcoEnergy. As such it joined the Display® campaign and labeled the building. EcoEnergy also supported the efforts of the municipality in their activities aimed at the improvement of their buildings’ performance with advice, expertise and information on all events organised by the Display® campaign.


Achievements The project was successful thanks to the good partnership between the municipality and the ESCo company.

_ The monitoring and evaluation of the results was done jointly by the Slaveyche Kindergarten administration and the municipal energy efficiency officer.

_ The results from the project are reported on the basis of data issued by the accounting department of the municipality for the actual expenditure on energy during the heating period and the Display® poster. The poster itself raised the interest of the children and parents in energy issues. The municipality has planned ambitious activities for awareness-raising for the next year in its Municipal Energy Program.
Lessons Learned A key lesson learnt from this project’s implementation is that ESCo contracting and partnerships between a private company and a municipality (especially a small municipality like Krivodol, with a small budget), provides a unique chance to implement energy efficiency projects and to gain long term effects for the benefit of the whole local community.

_ This project is widely applicable both to other schools and other building types, because it involves the installation of simple measures, such as heating controls and insulation, that leads to improvement of thermal comfort, which is very important for Bulgarian educational establishments at the moment. It also resulted in energy conservation and reduction of CO2 emissions at the same time. There are still Bulgarian schools and kindergartens where thermal comfort does not correspond to national standards.

To know more



Krivodol Municipality
Contact Dr Tzvetan Iliev
Phone + 359 9117 2545


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