Greece - Overview information
It contains overview information for Hellas (Greece) regarding the current status of implementation of Directive 2002/91/EC in buildings. It includes aspects of energy performance in accordance with thermal and visual comfort. Also it is shown the current classification of buildings regarding the consumption (5 categories).
Table of Contents
The energy performance regulation in Hellas (Greece) is still under development. This presentation illustrates the general structure of the regulation called KOXEE as it was its last development. Now a new regulation is preparing (KENAK) and there is limited information about the structure and the proposed calculation procedures. In the near future when more details about KENAK will be public available, this presentation will be updated and more accurate about the Energy Performance Regulations in Greece .
New Energy Performance Regulation
Energy Performance Building Regulation (EPBR) under development
No integrated EPB regulation was existing before
Responsible organization: Ministry of environment, physical planning and public works
Type of buildings considered
All new buildings
Extensions to existing buildings if extension >30 m 2
Existing buildings under total renovation actions, change of use, envelope renovation, etc
Existing buildings when their energy and environmental efficiency is going to improved
Type of buildings excluded
Open buildings with no heating/cooling requirements (storage, farm buildings, …)
Religion related buildings (churches, …)
Buildings of historical or cultural importance, where EP cannot be applied
Stand alone buildings when area <30m 2
Extension to existing buildings when extension <30 m 2
Energy aspects
Transmission related flows
Ventilation related flows
Internal gains
Solar gains
Lighting related energy flows
Heating and cooling systems
Losses of heating/cooling distribution
Domestic hot water
Renewable energies: thermal/electrical
Comfort related aspects
Thermal comfort in summer/winter
o The EP regulation proposes the design temperature in order to size the cooling/heating system. Reference values are proposed for humidity levels. Also parameters such as solar protection are also involved.
Visual comfort
o The requirements for visual comfort are determined according to the building type and use.
Indoor Air quality
o The IAQ deals with other regulation. However the fresh air requirements are presented, as well as the minimum ones. A presentation of various pollutants related to the indoor environment is also available.
Minimum requirements
Insulation levels for walls, roofs, floors
Window U-values
Air flow rate
Access to natural light
Efficiency to heating/cooling units
Insulation of domestic hot water tank
Installed lighting power
Use of an Energy Study of the building in order to determine the energy requirements for heating, cooling lighting and domestic hot water. The building’s annual energy consumption should be lower than the proposed levels according to:
o the type of building
o the shape of building (ratio between surface envelope and volume)
o and the region where the building is located (4 climatic zones are defined)
Also, an environmental rating of the building is required in order to determine its environmental performance.
For the whole building the electrical and fuel consumption is determined (for heating, cooling, lighting and domestic hot water). According to this consumption the CO 2 emission is calculated.
Three indices are calculated in order to classify the building according to:
o Heating energy requirements
o Cooling energy requirements
o Environmental aspect
Heating/Cooling Consumption
The classification of the building concerning the heating and cooling consumption includes 5 categories (probably more in the final version of the regulation)
- The classification concerning the environmental performance of the building is based on a pointing system that takes into account:
CO2 emissions
Use of renewable energy sources
Thermal/Visual comfort, IAQ,etc
Local microclimatic conditions
Water consumption
Use of equipment with energy/environmental labelling:
- Use of EN832 in order to calculate the heating requirements for residential and small non residential buildings
Possibility to apply the calculation by using easy applicable forms
A software tool will be prepared
- An inspector examines the type of material used for the air tightness of the building and estimates (without measurement) the tightness of the openings
The illuminace levels are measured
Measurement of the boiler’s characteristics (combustion gazes temperature, CO2, …). Auditing of the heating and cooling equipment status, examination of the distribution system (insulation of pipes, ducts, …) and the radiators, fan-coils, …
Validation of the U-values of opaque and transparent elements
Examination of the shading devices and validation of the corresponding shading factors
- Innovative systems are considered only if recognized laboratories certify their performance
A reference framework that allows to compare the standard solutions with innovative ones is not yet determined
- An energy inspection is a part of the procedure. This inspection confirms the results of the performed Energy Study by analyzing the real behaviour of the building
The proposed procedure includes the verification of the energy study one year after the operation of the building and after that systematically. For the existing buildings the regulation will be mandatory six years after the activation of the regulation.