Format And Procedure Of Issuance Of Energy Performance Certificates

Link to law: https://www.riigiteataja.ee/en/eli/ee/MKM/reg/527102014001/consolide
Published: 2014-10-05

Format and procedure of issuance of energy performance certificates1

Passed 23.04.2013 Annex 30
RT I, 30.04.2013, 2
Entry into force 03.05.2013
Amended by the following legal instruments (show)

Passed
Published
Entry into force

20.01.2014
RT I, 22.01.2014, 2
25.01.2014

29.09.2014
RT I, 02.10.2014, 6
05.10.2014

This regulation is enacted in accordance with subsection 4 of section 31 of the Building Act.

Chapter 1 GENERAL PROVISIONS 

§ 1.  Scope of application of the Regulation

This regulation establishes the requirements for the format of the energy performance certificates of buildings with indoor climate control or their parts and the procedure for the issuance of energy performance certificates.

§ 2.  Definitions

The terms in this regulation are defined as follows:
1) energy calculation - the calculation that serves to determine the building’s weighted specific energy use under standard conditions. The input parameters for this calculation include the parameters that characterise the indoor and outdoor climate, the periods of occupation and operation of the building and its technical systems, heat gain, the building’s leakage rate and other parameters which characterise the building and which are set out in the building design documentation;
2) energy carrier conversion factors - factors that take into account the consumption of primary energy required for the generation of delivered energy and the environmental impact involved. The numerical values of the energy carrier conversion factors are specified in Regulation no. 68 of 30 August 2012 of the Minister of Economic Affairs and Communications entitled Minimum Requirements for Energy Performance;
3) energy use - the use of electricity or heat at a given point in the system. The energy use is calculated on the basis of energy need, taking into account system losses and energy conversion losses. At the end-point of a technical system (usually the connection point to an energy network), the energy use of the technical system equals the sum of delivered energy and local renewable energy;
4) weighted specific energy use - the annual energy use multiplied by energy carrier conversion factors in kilowatt-hours per square metre of heated area of a building [kWh/(m 2 y)];
5) communal electricity of a multi-apartment building - the electricity used by electrical installations (such as stairwell lighting and heating, elevators, etc.) in communal use in the multi-apartment building;
6) degree day - the parameter that characterises the difference between outdoor temperature and the indoor temperature of a building, expressed in units of one-degree temperature difference on the Celsius scale [C°] between the base indoor temperature and the average outdoor temperature calculated for a period of 24 hours;
7) number of degree days per test reference year - the average number of degree days per annum in the region of the building’s location in the period 1975–2004;
8) base temperature of the building - t he building’s indoor temperature on Celsius scale [C°] which must be attained by heating the air in the building by means of the heating system and the ventilation system considering that further heating of the air in the building up to the required indoor temperature occurs on account of heat gains (heat gain from occupants, electrical equipment, solar radiation, etc.);
9) delivered energy - the electricity obtained from power networks or the heat obtained from district heating networks in kilowatt-hours per annum (kWh/y) or the energy content (in kilowatt-hours) of fuels that are obtained from fuel suppliers and that are used to cover the building’s annual total energy use in so far as this is not covered by local renewable energy. Any fuel obtained from the building site is deemed to constitute delivered energy;
10) exported energy - the heat or electricity that is generated within the building or on the territory of the building site and that is not used in the building but is fed into energy networks;
11) local renewable energy - t he heat or electricity generated from solar, wind, water and geothermal energy sources within the building or on the building site. In the case of heat pumps, the renewable energy harvested from the energy source is taken into account according to the heat pump’s coefficient of performance;
12) full year - twelve consecutive calendar months.

§ 3.  Energy performance certificate

(1) The energy performance certificate is issued to a building with indoor climate control or to a unit of such a building. A separate energy performance certificate may be issued to a building unit that may be used separately, provided the building lacks a common heating system.
(2) For the purposes of issuing the energy performance certificate, buildings are divided into two categories according to their purpose of use: residential and non-residential buildings. The types of building in the residential and non-residential category are set out in subsections 3–4 of section 1 of Regulation no. 68 of 30 August 2012 of the Minister of Economic Affairs and Communications entitled Minimum Requirements for Energy Performance.
(3) The energy performance certificate of a building with indoor climate control or a unit of such a building may be based on:
1) the energy calculation;
2) measured or estimated energy use;
3) in the case of small residential buildings, the simplified method for proving compliance with the minimum requirements for energy performance as specified in Regulation no. 68 of 30 August 2012 of the Minister of Economic Affairs and Communications entitled Minimum Requirements for Energy Performance.
(4) A building that is being designed or that is to undergo major renovation is issued the energy performance certificate on the basis of the energy calculation or, in the case of a small residential building, on the basis of the simplified method for proving compliance with the minimum requirements for energy performance.
(5) The energy performance certificate of an existing building is normally issued on the basis of energy use measurements (hereinafter, ‘energy performance certificate of an existing building’). Special cases are listed in subsection 2 of section 15 of this regulation.
(6) The undertaking that issues the energy performance certificate completes the required fields in the electronic system for drawing up energy performance certificates in the national register of construction works. In addition to completing the required fields, the undertaking must upload into the electronic system the input parameters that are regarded under this regulation as part of the energy performance certificate, the results of the calculation and, optionally, a photo of the building or building unit. The format of the digital file of the uploaded photo must comply with the requirements specified in the electronic system. If all data are entered correctly, the electronic system for drawing up energy performance certificates generates the following constituent elements of the energy performance certificate:
1) summary information of the energy performance certificate;
2) a display energy certificate to be placed in a prominent place where it is clearly visible to the public;
3) a list of energy saving measures (in the case of an energy performance certificate that is issued to an existing building).
(7) Where a display energy certificate is printed out from the electronic environment for drawing up energy performance certificates in the national register of construction works for the purpose of displaying it in the building in a prominent place clearly visible to the visitors, it must be made sure that the printout is of sufficiently high quality (i.e., the colour scheme on the printout corresponds to the colour scheme provided in Annex 2 of this regulation);
(8) Energy performance certificates are issued only through the national register of construction works.
(9) The information provided on the building’s energy performance certificate is disseminated through the national register of construction works.

§ 4.  Types of heat supply

(1) The types of heat supply are the following:
1) district heating - in the case of a heat supply system that serves multiple consumers or buildings in a settlement or region;
2) central heating - in the case of a heat supply system that serves the building where it is located (such as a boiler in the basement of a multi-apartment building, furnace in a single-family home, etc.);
3) local heating - in the case of a heat supply system that serves the room in which it is located.
(2) Where the building has been assigned a specific type of heating system in the national register of construction works and provided the corresponding information is accurate, the type of heat supply is determined on the basis of the information available in the national register of construction works.
(3) Where a building has been not been assigned a specific type of heating system in the national register of construction works or where the relevant information in the register is inaccurate, the type of heat supply is determined in accordance with subsection 1 of this section
(4) Where the energy performance certificate is issued to a building unit, the type of heat supply must be determined on the basis of the input parameters collected for the purpose of issuing the energy performance certificate in respect of that building unit.

§ 5.  Energy sources

(1) Energy sources are the following:
1) hot water (in the case of district heating);
2) steam (in certain specific cases of district heating);
3) fuel;
4) electricity;
5) heat pumps;
6) other energy sources.
(2) Where the energy source is fuel, the type of the fuel must be specified on the basis of the following list:
1) shale oil;
2) light heating oil;
3) diesel fuel;
4) heavy fuel oil;
5) natural gas;
6) liquefied gas;
7) biogas;
8) firewood (split logs);
9) firewood (mixed);
10) firewood (birch);
11) wood chips;
12) wood briquettes;
13) wood pellets;
14) peat briquettes;
15) peat blocks;
16) milled peat;
17) coal.
(3) Where the energy source is a heat pump, the type of the heat pump must be specified on the basis of the following list:
1) geothermal heat pump;
2) air-to-air heat pump;
3) air-to-water heat pump.
(4) Where a building has been assigned a specific type of energy source in the national register of construction works and the corresponding information is accurate, the type of energy source is determined on the basis of the information available in the national register of construction works.
(5) Where a building has not been assigned a specific type of energy source in the national register of construction works or where the relevant information in the register is inaccurate, the type of energy source is determined in accordance with subsections 1 and 2 of this section.
(6) Where the energy performance certificate is issued to a building unit, the type of energy source must be determined on the basis of the input parameters collected for the purpose of issuing an energy performance certificate in respect of that building unit.

Chapter 2 ISSUANCE OF ENERGY PERFORMANCE CERTIFICATES ON THE BASIS OF THE ENERGY CALCULATION 

§ 6.  Format of the energy performance certificate issued on the basis of the energy calculation

(1) The energy performance certificate issued on the basis of the energy calculation normally consists of four parts:
1) summary information of the energy performance certificate;
2) a display energy certificate to be placed in a prominent place where it is clearly visible to the public;
3) the input parameters of the energy calculation as specified in Annex 1 of Regulation no. 63 of 8 October 2012 of the Minister of Economic Affairs and Communications entitled Methodology for Calculating the Energy Performance of Buildings;
4) the results of the energy calculation as specified in Annex 3 of Regulation no. 63 of 8 October 2012 of the Minister of Economic Affairs and Communications entitled Methodology for Calculating the Energy Performance of Buildings.
(2) Where the compliance of a building that is being designed or that is to undergo major renovation with minimum requirements for energy performance is proved on the basis of the simplified method for proving compliance provided in Regulation no. 68 of 30 August 2012 of the Minister of Economic Affairs and Communications entitled Minimum Requirements for Energy Performance, the constituent elements of the energy performance certificate include the results of the energy calculation as set out in Annex 2 of Regulation no. 63 of 8 October 2012 of the Minister of Economic Affairs and Communications entitled Methodology for Calculating the Energy Performance of Buildings.
(3) The summary form of the energy performance certificate issued to a building or a unit of a building is provided in Annex 1 of this regulation.
(4) The form of the display energy certificate which is issued on the basis of the energy calculation and placed in a prominent place clearly visible to the public in any building or any unit of a building referred to under subsections 5 and 51 of section 31 of the Building Act, or in any other building, is provided in Annex 2 of this regulation.

§ 7.  Energy performance indicator of the building

(1) When a building is issued an energy performance certificate on the basis of the energy calculation, the building’s energy performance indicator is determined in accordance with Regulation no. 63 of 8 October 2012 of the Minister of Economic Affairs and Communications entitled Methodology for Calculating the Energy Performance of Buildings.
(2) Where the compliance with minimum requirements for energy performance of a building that is being designed or that is to undergo major renovation is proved on the basis of the simplified method for proving compliance provided in Regulation no. 68 of 30 August 2012 of the Minister of Economic Affairs and Communications entitled Minimum Requirements for Energy Performance, the energy performance indicator of that building or that building unit is deemed to equal the limit value of the energy performance indicator provided under point 1 of subsection 4 of section 3 of the same regulation in relation to the purpose of use of the building or building unit.

§ 8.  Class of the energy performance indicator

(1) The class of the energy performance indicator is determined on the basis of the building’s energy performance indicator and the building’s purpose of use according to the tabulated ranges of the value of the energy performance indicator as provided in Annex 3 of this regulation.
(2) Where a building which has several purposes of use is issued a single energy performance certificate, the class of the energy performance indicator is determined according to the purpose of use which is the largest in proportion to the heated area of the building.

§ 9.  Date of issue and term of validity of energy performance certificates issued on the basis of energy calculation

(1) The date of issue of an energy performance certificate issued on the basis of the energy calculation is the date on which the energy performance certificate is generated in the national register of construction works.
(2) The end date of validity of an energy performance certificate issued on the basis of the energy calculation is established in accordance with subsection 3 of section 31 of the Building Act.

Chapter 3 ISSUANCE OF ENERGY PERFORMANCE CERTIFICATES TO EXISTING BUILDINGS 

Division 1 Format of the energy performance certificate of existing buildings 

§ 10.  Format of the energy performance certificate of existing buildings

(1) The energy performance certificate of an existing building consists of at least five elements:
1) summary information of the energy performance certificate;
2) a display energy certificate to be placed in a prominent place clearly visible to the public;
3) a list of energy saving measures;
4) the input parameters that are required for calculating the weighted specific use of energy and that are set out in this regulation or the input parameters of the energy calculation that are set out in Annex 1 of Regulation no. 63 of 8 October 2012 of the Minister of Economic Affairs and Communications entitled Methodology for Calculating the Energy Performance of Buildings;
5) the calculation of the weighted specific energy use as set out in this regulation or the results of the energy calculation as set out in Annex 3 of Regulation no. 63 of 8 October 2012 of the Minister of Economic Affairs and Communications entitled Methodology for Calculating the Energy Performance of Buildings.
(2) The summary form of the energy performance certificate of an existing building or building unit is provided in Annex 1 of this regulation.
(3) The form of the display energy certificate which is issued to an existing building or building unit and placed in a prominent place clearly visible to the public in any building referred to under subsections 5 and 51 of section 31 of the Building Act, or in any other building, is provided in Annex 2 of this regulation.
(4) The list of energy saving measures is provided in Annex 4 of this regulation.
(5) If the undertaking which issues, or the person who has applied for, the energy performance certificate wishes this, it is possible to upload a photograph of the building or building unit to the electronic environment for drawing up energy performance certificates in the national register of construction works.
(6) The photograph referred to in subsection 5 of this section must meet the following requirements:
1) the photograph must depict the building from the outside;
2) the image of the building or building unit must occupy as large an area on the photograph as possible (i.e., the photograph should not depict any irrelevant objects);
3) where an energy performance certificate is issued in respect of a single apartment, the photograph is taken of the entire multi-apartment building.

§ 11.  Input parameters required for calculating of weighted specific use of energy

(1) The element of input parameters required for the calculation of the weighted specific energy use must include at least the following information:
1) the registration number of the construction work in the national register of construction works. Where the energy performance certificate is requested in respect of a unit of an existing building, any information allowing the identification of the unit (such as the apartment number, name or number of the block) must also be shown;
2) the year when construction of the building was completed. If the building has undergone renovation which has significantly influenced the building’s energy use, the list of the relevant renovation operations must be provided together with the year of their completion;
3) the heated area (m2) of the building or building unit in respect of which the energy performance certificate is issued. Where a building has several purposes of use and the building is issued a single energy performance certificate, the purpose of use to be shown is the one which is the largest in proportion to the heated area of the building;
4) the volume of fuel or energy used for the purpose of heating, to be given in respect of the last three years if possible, but at least in respect of one full year, separately for each type of energy source. Where, besides electricity, the building’s ventilation system also employs energy from other energy carriers, the volume of the other types of fuel or energy used by the ventilation system are shown together with the quantities of fuel or energy used for the purpose of heating;
5) the volume of fuel or energy used to heat household water, to be given in respect of the last three years if possible, but at least in respect of one full year, separately for each type of energy source;
6) the volume of electricity used, to be given in respect of the last three years if possible, but at least in respect of one full year. Where no information is available regarding the specific volume of electricity used by the individual apartments of a multi-apartment building, the communal electricity of the multi-apartment building and the volume of electricity used in the apartments as determined on the basis of the parameters provided in Annex 5 of this regulation may be added up in order to determine the volume of electricity used;
7) the volume of natural gas consumed, to be given in respect of the last three years if possible, but at least in respect of one full year;
8) the volume of exported energy fed into energy networks, to be given in respect of the last three years if possible, but at least in respect of one full year;
9) the type of the local renewable energy system used (e.g., solar collector, solar panel, wind turbine, heat pump, etc.);
10) the information provided regarding the building’s purpose of use, actual occupation and indoor climate by the person requesting the energy performance certificate or by the authorised representative of that person. In the case of a multi-apartment building, the number of the apartment must also be shown;
11) the name of the person or agency providing the information.
(2) By uploading into the electronic environment for drawing up energy performance certificates in the national register of construction works the input parameters required for the calculation of the weighted specific energy use, the person who issues the energy performance certificate certifies that the input parameters have been provided by the person who requested the energy performance certificate or by the authorised representative of that person and that the person who requested the energy performance certificate or the authorised representative of that person has declared the following:
1) the information made available to the undertaking which issues the energy performance certificate regarding the building and the building’s energy use is the information known to the person who made the information available. The information regarding the building’s energy use consists of the data that characterise the building’s energy use both directly and indirectly;
2) the person who made the information available is aware of the fact that in the absence of due input parameters for the calculation of the weighted specific energy use, the specific expenditure of heat and electricity may be determined in accordance with the method provided under subsection 2 of section 15 of this regulation and the undertaking issuing the energy performance certificate may issue the energy performance certificate with the least efficient class of weighted specific energy use.
(3) Where the building’s weighted specific energy use is determined in accordance with points 1 and 2 of subsection 2 of section 15 of this regulation, the required input parameters set out under this section are to be submitted insofar as this is possible given the information obtained from the person who requested the energy performance certificate or from the authorised representative of that person.
(4) Where the building’s weighted specific energy use is determined in accordance with point 3 of subsection 2 of section 15 of this regulation, the input parameters of the energy calculation as set out in Annex 1 of Regulation no. 63 of 8 October 2012 of the Minister of Economic Affairs and Communications entitled Methodology for Calculating the Energy Performance of Buildings are uploaded into the electronic environment for drawing up energy performance certificates in the national register of construction works. In that case, the submission of the input parameters required for the calculation of the weighted specific energy use as set out in this section is not required.

§ 12.  Calculation of weighted specific energy use

(1) The calculation of weighted specific energy use must show the input parameters used in the calculation and the individual operations carried out in order to determine the building’s weighted specific energy use.
(2) When calculating the weighted specific energy use, the following input parameters of the calculation must be shown:
1) the purpose of use of the building or building unit, which determines the selection of the range of the value of the weighted specific energy use. For the purposes of this regulation, such a purpose of use is one which is the largest in proportion to the heated area of the building;
2) region of the county in which the building is located;
3) the building’s type of heat supply. When determining the type of heat supply, section 4 of this regulation is to be observed;
4) the energy source used to heat the building. When determining the energy source, section 5 of this regulation is to be observed;
5) the heated area of the building (m2);
6) information regarding the energy use on the basis of which the fuel and energy use for heating the building (MWh/y) is determined. The information should be provided in respect of the last three years if possible, but at least in respect of one full year;
7) information on the basis of which the fuel and energy use for heating the household water (MWh/y) is determined. The information should be provided in respect of the last three years if possible, but at least in respect of one full year;
8) information regarding the electricity use in the building (MWh/y). The information should be provided in respect of the last three years if possible, but at least in respect of one full year;
9) information regarding the consumption of natural gas (MWh/y) in the building for purposes other than the production of heating energy. The information should be provided in respect of the last three years if possible, but at least in respect of one full year;
10) the number of degree days by reference to the region of the building’s location according to the building’s base temperature during the last three full years and the number of degree days of the test reference year.
(3) When calculating the weighted specific energy use, the following calculation results must be shown:
1) the expenditure of heating energy (MWh/y) reduced in accordance with the number of degree days per test reference year. The information should be provided if possible in respect of the last three years, but at least in respect of one full year;
2) the average expenditure of heating energy (MWh/y) reduced in accordance with the number of degree days per reference year and multiplied by the energy carrier conversion factors. When determining the average expenditure of heating energy, the information used should cover if possible the period of the last three years, but not less than one full year;
3) the average expenditure of thermal energy (MWh/y) for the purpose of heating household water, multiplied by the energy carrier conversion factors. When determining the average expenditure of thermal energy for the purpose of heating household water, the information used should if possible cover the last three years, but not less than one full year. Where the building’s most important source of energy is not electricity or natural gas and only natural gas or electricity is used for heating the household water and the total expenditure of electricity or natural gas is metered, stating the average expenditure of thermal energy for the purpose of heating household water is not required;
4) the average expenditure of electricity (MWh/y) multiplied by the energy carrier conversion factor. When determining the average expenditure of electricity, the information used should cover if possible the last three years, but not less than one full year;
5) the average consumption of natural gas (MWh/y) which is used for purposes other than that of production of heating energy, multiplied by the energy carrier conversion factor. When determining the average consumption of natural gas, the information used should cover if possible the last three years, but not less than one full year;
6) the average annual energy use of the building (MWh/y);
7) the annual weighted specific energy use of the building [kWh/(m2·y)];
8) the class of the weighted specific energy use of the building.
(4) The data used in the calculation of the weighted specific energy use must reflect, as accurately as possible, the condition of the building at the time that the energy performance certificate is issued. Where during the previous three years the building has been renovated to an extent that has significantly influenced its energy use, the calculations must be based on the period following the renovation.
(5) Where the building’s weighted specific energy use is determined in accordance with points 1 and 2 of subsection 2 of section 15 of this regulation, the input parameters and calculation results required by virtue of this section are submitted insofar as this is possible given the information obtained from the person who requested the energy performance certificate or from the authorised representative of that person.
(6) Where the building’s weighted specific energy use is determined in accordance with point 3 of subsection 2 of section 15 of this regulation, the results of the energy calculation as set out in Annex 3 of Regulation no. 63 of 8 October 2012 of the Minister of Economic Affairs and Communications entitled Methodology for Calculating the Energy Performance of Buildings are uploaded into the electronic environment for drawing up energy performance certificates in the national register of construction works. In that case, submission of the input parameters for calculating the weighted specific energy use and the calculation results as described in this section is not required.

Division 2 Information required for the issuance of energy performance certificates to existing buildings 

§ 13.  Heated area

(1) As a rule, the building’s heated area is determined on the basis of the information available in the national register of construction works.
(2) Where the national register of construction works lacks information regarding the building’s heated area, the following information may be used for the purpose of determining that area:
1) any documentation prepared in respect of the building (such as building design documentation, as-built drawings, etc.);
2) information provided by the person who requested the energy performance certificate or the authorised representative of that person.
(3) The actual value of the heated area may differ from the information entered in the national register of construction works. Where possible, the person issuing the energy performance certificate should ascertain the actual heated area of the building and state what information served as the basis for issuing the energy performance certificate.

§ 14.  Degree days

(1) The building’s weighted specific energy use is calculated on the basis of degree days whose value is determined as a function of the region where the building is located and of the building’s base temperature.
(2) The region where the building is located must be selected on the basis of the county of the building’s location from among the following regions:
1) region I which includes the County of Ida-Viru and the County of Lääne-Viru;
2) region II which includes the Counties of Järva, Jõgeva, Rapla, Tartu and Viljandi;
3) region III which includes the Harju County;
4) region IV which includes the Counties of Põlva, Valga and Võru;
5) region V which includes the Counties of Lääne and Pärnu;
6) region VI which includes the Counties of Hiiu and Saare.
(3) The degree days of the regions of the building’s location are determined on the basis of the 24-hour average outdoor temperature measured at the following weather stations:
1) region I - Jõhvi;
2) region II - Tartu;
3) region III - Tallinn (Harku);
4) region IV - Valga;
5) region V - Pärnu;
6) region VI - Ristna.
(4) For the purpose of calculating the building’s weighted specific energy use that is required in order to issue the energy performance certificate, the building’s base temperature is always 17 °C.
(5) Information regarding the degree days in a given full year and per test reference year in different regions of the building’s location, given the building’s base temperature as provided in subsection 4 of this section, is published on the website of the Ministry of Economic Affairs and Communications.

§ 15.  Weighted specific energy use

(1) In order to determine the building’s weighted specific energy use, the following parameters are calculated:
1) the average expenditure of heating energy reduced in accordance with the number of degree days per test reference year and multiplied by the energy carrier conversion factors;
2) the average expenditure of energy for the purpose of heating household water, multiplied by the energy carrier conversion factors;
3) the average expenditure of electricity multiplied by the energy carrier conversion factor;
4) the average expenditure of gas which is used for other purposes than the generation of heating energy, multiplied by the energy carrier conversion factor.
(2) Where information regarding the energy used is impossible to obtain from the person who requested the energy performance certificate or from the authorised representative of that person or where the information regarding the energy used in the building is available for a period of time that is shorter than one full year:
1) the building’s weighted specific energy use is to be determined using the parameters provided in Annexes 5 and 6 of this regulation and in Regulation no. 63 of 8 October 2012 of the Minister of Economic Affairs and Communications entitled Methodology for Calculating the Energy Performance of Buildings, except where the building, in terms of the purpose of use which is the largest in proportion to the heated area of the building, may be classified as a business building, public building, terminal building or health care building, or
2) the building is to be assigned the value of annual weighted specific energy use which corresponds to the least efficient specific energy use class (H) for the given purpose of use, or
3) the building’s weighted specific energy use is to be determined on the basis of the building’s energy calculation that is performed by the design contractor in accordance with Regulation no. 63 of 8 October 2012 of the Minister of Economic Affairs and Communications entitled Methodology for Calculating the Energy Performance of Buildings. The relevant parameters may also be taken from the building’s building design documentation provided the heating and ventilation sections of the documentation state the estimated energy need of the building in terms of its constituent units (estimated energy need for heating, ventilation, cooling).
(3) In order to calculate the expenditure of heating energy (MWh/y) for every given full year, the energy content of the fuel consumed, the thermal energy used for heating and ventilation purposes and the electricity used for heating purposes must be added up. The energy content of each fuel is calculated on the basis of its calorific value. The calorific values to be used are the lowest calorific values of the substances consumed as provided by the supplier of the substance, or the lowest calorific value of the substance consumed as provided in Regulation no. 63 of 8 October 2012 of the Minister of Economic Affairs and Communications entitled Methodology for Calculating the Energy Performance of Buildings.
(4) Where the most important source of energy used for heating is electricity or an electrically-operated heat pump and the electricity used for heating is not metered separately, the electricity used for heating household water and for other purposes (such as cooking, operating home appliances, lighting, etc.) must be subtracted from the total volume of delivered electricity. Where no information is available regarding the specific use of electricity for the heating of household water or for other purposes, the parameters set out in Annex 5 of this regulation or in Regulation no. 63 of 8 October 2012 of the Minister of Economic Affairs and Communications entitled Methodology for Calculating the Energy Performance of Buildings may be used. Where the water used as hot household water is not metered separately, the volume of electricity used for producing hot household water may be determined on the basis of the metered total use of cold household water of the building and the estimated proportion of hot household water in the building’s total use of cold household water.
(5) The expenditure of heating energy (MWh/y) reduced in accordance with the number of degree days per test reference year is calculated in respect of each energy source by means of the following formula:

where Qteg,kyt – is the expenditure of heating energy in the given full year (MWh/y);
SN – is the number of degree days per test reference year;
Steg – is the number of degree days per given full year.
(6) The expenditure of heating energy reduced in accordance with the number of degree days per test reference year and multiplied by the energy carrier conversion factors (hereinafter, ‘weighted test reference year expenditure of heating energy’) for a full year is calculated by means of the formula:

where p – is the number of energy sources used for generating the required thermal energy during the given full year;
Ck – is the energy carrier conversion factor.
(7) The average weighted test reference year expenditure of heating energy over several years (MWh/y) is calculated by means of the formula:

where n – is the number of relevant full years.
(8) The expenditure of thermal energy for producing hot household water is calculated as the product of the specific heat of water, the difference between the average temperature of hot household water and cold water and the quantity of hot household water. The quantity of hot household water is determined, as a rule, on the basis of the read-out of the meter that measures the quantity of cold water supplied to the heat exchanger of hot household water. The heat loss of the piping of hot household water and the thermal energy released into the building by towel driers is added to the thermal energy expended for the purpose of heating household water. Where there are no metering data concerning the quantity of hot household water, the expenditure of thermal energy for the purpose of producing hot household water may be determined on the basis of the metered total volume of cold household water of the building and the estimated proportion of hot household water in the building’s total use of cold household water. In order to determine the expenditure of thermal energy for the purpose of heating household water, the parameters provided in Regulation no. 63 of 8 October 2012 of the Minister of Economic Affairs and Communications entitled Methodology for Calculating the Energy Performance of Buildings may also be used.
(9) The expenditure of thermal energy for the purpose of producing hot household water, multiplied by the energy carrier conversion factors (hereinafter, ‘the weighted expenditure of thermal energy for the purpose of producing hot household water’, MWh/y) for a given full year is calculated by means of the formula:

where Qtvs – is the expenditure of thermal energy for the purpose of heating household water during the given full year (MWh/y);
p – is the number of energy sources used for generating the required thermal energy during the given full year;
Ck – is the energy carrier conversion factor.
(10) The average weighted expenditure for producing hot household water for several years (MWh/a) is calculated by means of the formula:

where n – is the given number of full years.
(11) The calculation described under subsections 9–10 is not required where:
1) only electricity is used in the production of hot household water and the total electricity use is metered (electricity is not the most important source of energy for the building). In such a case, the expenditure of electricity for the production of hot household water is included in the total volume of electricity used;
2) only natural gas is used in the production of hot household water and the total consumption of natural gas is metered. The consumption of natural gas for the purpose of producing hot household water is included in the consumption of natural gas for purposes other than that of producing heating energy.
(12) The average expenditure of electricity (MWh/y) multiplied by the energy carrier conversion factor is calculated by means of the formula:

where Qel – is the volume of expended electricity (MWh/y);
n – is the given number of full years;
Ck – is the energy carrier conversion factor.
(13) The average expenditure of natural gas (MWh/y) which is consumed for purposes other than that of producing heating energy, multiplied by the energy carrier conversion factor, is calculated by means of the formula:

where Qg – is the expenditure of natural gas (MWh/y) for purposes other than that of producing heating energy;
n – is the given number of full years;
Ck – is the energy carrier conversion factor.
(14) The building’s average weighted energy use for the test reference year (MWh/y) is calculated by means of the formula:

(15) The building’s annual weighted specific energy use [kWh/(m²•y)] is calculated by means of the formula:

where Akyt – is the building’s heated area which is determined in accordance with section 13 of this regulation (m²).
(16) Where energy is exported from the building and fed into energy networks, the building’s annual weighted specific energy use is determined using the calculation logic which is described with regard to the calculation of the energy performance indicator in Regulation no. 63 of 8 October 2012 of the Minister of Economic Affairs and Communications entitled Methodology for Calculating the Energy Performance of Buildings.

§ 16.  Class of weighted specific energy use

(1) The class of the weighted specific energy use is determined in accordance with the building’s yearly weighted specific energy use and the building’s purpose of use according to the tabulated ranges of the value of the energy performance indicator as provided in Annex 3 of this regulation.
(2) Where a building which has several purposes of use is issued a single energy performance certificate, the class of the weighted specific energy use is determined according to the purpose of use which is the largest in proportion to the heated area of the building.

Chapter 4 IMPLEMENTING PROVISIONS 

§ 17.  Implementation of this regulation

Any cases in which the class of the energy performance indicator or of the weighted specific energy use is not determined in accordance with this regulation are henceforth to be marked with the corresponding observation in the national register of construction works.

§ 18.  Repeal of regulation

Regulation no. 107 of 17 December 2008 of the Minister of Economic Affairs and Communications entitled Format of Energy Performance Certificates and Procedure of Their Issuance (RT I, 29.12.2010, 34) is hereby repealed.

§ 19.  Entry into force of this regulation

This regulation enters into force in accordance with standard procedure.

1Directive 2002/91/EC of the European Parliament and of the Council on the energy performance of buildings (OJ L 1, 4.01.2003, pp. 65–71), amended by Directive 2010/31/EU of the European Parliament and of the Council on the energy performance of buildings (OJ L 153, 18.06.2010, pp. 13–35)
Annex 1 Summary form of the energy performance certificate (RT I, 02.10.2014, 6 - entry into force 05.10.2014)
Annex 2 Form of the display energy certificate to be placed in a prominent place clearly visible to the public (RT I, 02.10.2014, 6 - entry into force 05.10.2014)
Annex 3 Determining the class of the weighted specific energy use and of the energy performance indicator
Annex 4 List of energy saving measures (RT I, 22.01.2014, 2 - entry into force 25.01.2014)
Annex 5 Energy need of residential buildings per unit of heated area
Annex 6 Net energy use for space heating reduced in accordance with the number of degree days per test reference year
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