‘specific energy consumption (SEC)’ (expressed in kWh/(m2.a)) means a coefficient to express the energy consumed for ventilation per m2 heated floor area of a dwelling or building, calculated for RVUs in accordance with Annex VIII;
‘sound power level (LWA)’ means the casing-radiated A-weighted sound power level expressed in decibels (dB) with reference to the sound power of one picowatt (1 pW), transmitted by the air at reference airflow;
‘multi-speed drive’ means a fan motor that can be operated at three or more fixed speeds plus zero (‘off’);
‘variable speed drive (VSD)’ means an electronic controller, integrated or functioning as one system or as a separate delivery with the motor and the fan, which continuously adapts the electrical power supplied to the motor in order to control the flow rate;
‘heat recovery system (HRS)’ means the part of a bidirectional ventilation unit equipped with a heat exchanger designed to transfer the heat contained in the (contaminated) exhaust air to the (fresh) supply air;
‘thermal efficiency of a residential HRS (ηt)’ means the ratio between supply air temperature gain and exhaust air temperature loss, both relative to the outdoor temperature, measured under dry conditions of the HRS, and standard air conditions, with balanced mass flow at reference flow rate, an indoor-outdoor temperature difference of 13 K, no correction for thermal heat gain from fan motors;
‘internal leakage rate’ means the fraction of extract air present in the supply air of ventilation units with HRS as a result of leakage between extract and supply airflows inside the casing when the unit is operated at reference air volume flow, measured at the ducts, the test shall be performed at 100 Pa;
‘carry over’ means the percentage of the exhaust air which is returned to the supply air for a regenerative heat exchanger according to the reference flow;
‘external leakage rate’ means the fraction of reference air volume flow escaping from the casing of a unit when it is subjected to a pressure test, the test shall be performed at 250 Pa for both under and over pressure;
‘mixing’ means the immediate recirculation or short-circuiting of airflows between discharge and intake ports at both the indoor and outdoor terminals so that they do not contribute to the effective ventilation of a building space, when the unit is operated at reference air volume rate;
‘mixing rate’ means the fraction of extract airflow, as part of the total reference air volume, that recirculates between discharge and intake ports at both the indoor and outdoor terminals and thus does not contribute to the effective ventilation of a building space, when the unit is operated at reference air volume (measured at 1 m distance from the indoor supply duct), less the internal leakage rate;
‘effective power input’ (expressed in W) means the electric power input at reference flow rate and corresponding external total pressure difference and includes the electrical demand for fans, controls (including remote controls) and the heat pump (if integrated);
‘specific power input (SPI)’ (expressed in W/(m3/h)) means the ratio between the effective power input (in W) and the reference flow rate (in m3/h);
‘flow rate/pressure diagram’ means a set of curves for flow rate (horizontal axis) and pressure difference of a unidirectional RVU or the supply side of a bidirectional RVU, where each curve represents one fan speed with at least eight equidistant test-points and the number of curves is given by the number of discrete fan speed options (one, two or three) or, in the case of a variable fan speed drive, includes at least a minimum, maximum and appropriate intermediate curve close to the reference air volume and pressure difference for SPI testing;
‘reference flow rate’ (expressed in m3/s) is the abscissa value to a point on a curve in the flow rate/pressure diagram which is on or closest to a reference point at 70 % at least of the maximum flow rate and 50 Pa for ducted units and at a minimum pressure for non-ducted units. For bidirectional ventilation units, the reference air volume flow rate applies to the air supply outlet;
‘control factor (CTRL)’ means a correction factor for the SEC calculation depending on the type of control that is part of the ventilation unit, according to the description in Annex VIII Table 1;
‘control parameter’ means a measurable parameter or set of measurable parameters that are assumed to be representative of the ventilation demand, e.g. the level of relative humidity (RH), carbon dioxide (CO2), volatile organic compounds (VOC) or other gases, presence, motion or occupancy detection from infrared body heat or from reflection of ultrasonic waves, electrical signals from human operation of lights or equipment;
‘manual control’ means any control type that does not use demand control;
‘demand control’ means a device or set of devices, integrated or as a separate delivery, that measures a control parameter and uses the result to regulate automatically the flow rate of the unit and/or the flow rates of the ducts;
‘clock control’ means a clocked (daytime-controlled) human interface to control the fan speed/flow rate of the ventilation unit, with at least seven weekday manual settings of the adjustable flow rate for at least two setback periods, i.e. periods in which a reduced or no flow rate applies;
‘demand controlled ventilation (DCV)’ means a ventilation unit that uses demand control;
‘ducted unit’ means a ventilation unit intended to ventilate one or more rooms or enclosed space in a building through the use of air ducts, intended to be equipped with duct connections;
‘non-ducted unit’ means a single room ventilation unit intended to ventilate a single room or enclosed space in a building, and not intended to be equipped with duct connections;
‘central demand control’ means a demand control of a ducted ventilation unit that continuously regulates the fan speed(s) and flow rate based on one sensor for the whole ventilated building or part of the building at central level;
‘local demand control’ means a demand control for a ventilation unit that continuously regulates the fan speed(s) and flow rates based on more than one sensor for a ducted ventilation unit or one sensor for a non-ducted unit;
‘static pressure (psf)’ means the total pressure minus the fan dynamic pressure;
‘total pressure (pf)’ means the difference between the stagnation pressure at the fan outlet and that at the fan inlet;
‘stagnation pressure’ means the pressure measured at a point in a flowing gas if it were to be brought to rest by means of an isentropic process;
‘dynamic pressure’ means the pressure calculated from the mass flow rate and the average gas density at the outlet and the unit outlet area;
‘recuperative heat exchanger’ means a heat exchanger intended to transfer thermal energy from one air stream to another without moving parts, such as a plate or tubular heat exchanger with parallel flow, cross flow or counter flow, or a combination of these, or a plate or tubular heat exchanger with vapour diffusion;
‘regenerative heat exchanger’ means a rotary heat exchanger incorporating a rotating wheel for the purpose of transferring thermal energy from one air stream to the other, including material allowing latent heat transfer, a drive mechanism, a casing or frame, and seals to reduce bypassing and leakage of air from one stream or another; such heat exchangers have varying degrees of moisture recovery depending on the material used;
‘airflow sensitivity to pressure variations’ of a non-ducted RVU is the ratio between the maximum deviation from the maximum RVU flow rate at + 20 Pa and that at – 20 Pa external total pressure difference;
‘indoor/outdoor air tightness’ of a non-ducted RVU is the flow rate (expressed in m3/h) between indoors and outdoors when the fan(s) is(are) switched off.
Specific energy consumption (SEC) classes of residential ventilation units calculated for average climate:
Classification from 1 January 2016
SEC class | SEC in kWh/a.m2 |
---|---|
A+ (most efficient) | SEC < – 42 |
A | – 42 ≤ SEC < – 34 |
B | – 34 ≤ SEC < – 26 |
C | – 26 ≤ SEC < – 23 |
D | – 23 ≤ SEC < – 20 |
E | – 20 ≤ SEC < – 10 |
F | – 10 ≤ SEC < 0 |
G (least efficient) | 0 ≤ SEC |
The label shall provide the following information:
supplier's name or trade mark;
supplier's model identifier;
energy efficiency; the head of the arrow containing the energy efficiency class of the appliance shall be placed at the same height as the head of the arrow of the relevant energy efficiency class. Energy efficiency is indicated for an ‘average’ climate;
sound power level (LWA) in dB rounded to the nearest integer;
maximum flow rate in m3/h rounded to the nearest integer, accompanied by one arrow representing UVUs.
The label shall provide the following information:
supplier's name or trade mark;
supplier's model identifier;
energy efficiency; the head of the arrow containing the energy efficiency class of the appliance shall be placed at the same height as the head of the arrow of the relevant energy efficiency class. Energy efficiency is indicated for an ‘average’ climate;
sound power level (LWA) in dB rounded to the nearest integer;
maximum flow rate in m3/h rounded to the nearest integer, accompanied by two arrows in opposite directions representing BVUs.
Whereby:
The label shall be at least 75 mm wide and 150 mm high. Where the label is printed in a larger format, its content shall nevertheless remain proportionate to the specifications above.
The background shall be white.
Colours are coded as CMYK — cyan, magenta, yellow and black, following this example: 00-70-X-00: 0 % cyan, 70 % magenta, 100 % yellow, 0 % black.
The label shall fulfil all of the following requirements (numbers refer to the figure above):
EU label border stroke: 3,5 pt — colour: Cyan 100 % — round corners: 2,5 mm.
EU logo: Colours: X-80-00-00 and 00-00-X-00.
Energy logo: Colour: X-00-00-00.
Pictogram as depicted: EU logo + energy logo: width: 62 mm, height: 12 mm.
Sub-logos border: 1 pt — colour: cyan 100 % — length: 62 mm.
A+–G scales:
Arrow: height: 6 mm, gap: 1 mm — colours:
Highest class: X-00-X-00,
Second class: 70-00-X-00,
Third class: 30-00-X-00,
Fourth class: 00-00-X-00,
Fifth class: 00-30-X-00,
Sixth class: 00-70-X-00,
Seventh class 00-X-X-00,
Last class: 00-X-X-00,
Text: Calibri bold 13 pt, capitals, white.
Specific energy consumption class
Arrow: width: 17 mm, height: 9 mm, 100 % black;
Text: Calibri bold 18,5 pt, capitals, white; ‘+’ symbols: Calibri bold 11 pt, white aligned on a single row.
Sound power level in dB:
Border: 1,5 pt — colour: cyan 100 % — round corners: 2,5 mm;
Value: Calibri bold 16 pt, 100 % black;
‘dB’: Calibri regular 10 pt, 100 % black.
Maximum flow rate in m3/h:
Border: 1,5 pt — colour: cyan 100 % — round corners: 2,5 mm;
Value: Calibri bold 16 pt, 100 % black;
‘m3/h’: Calibri bold 16 pt, 100 % black;
One or two arrows
each width: 10 mm, each height: 10 mm.
Colour: cyan 100 %.
Energy:
Text: Calibri regular 6 pt, capitals, black.
Reference period:
Text: Calibri bold 8 pt.
Supplier's name or trademark
Supplier's model identifier
The suppliers' name or trade mark and model identifier shall fit in a space of 62 × 10 mm.
The information in the product fiche of the residential ventilation unit referred to in Article 3(1)(b) shall be given in the following order and shall be included in the product brochure or other literature provided with the product:
supplier's name or trade mark;
supplier's model identifier i.e. the code, usually alphanumeric, used to distinguish a specific residential ventilation unit model from other models with the same trade mark or supplier's name;
specific energy consumption (SEC) in kWh/(m2.a) for each applicable climate zone and SEC class;
declared typology in accordance with Article 2 of this Regulation (, unidirectional or bidirectional);
type of drive installed or intended to be installed (multi-speed drive or variable speed drive);
type of heat recovery system (recuperative, regenerative, none);
thermal efficiency of heat recovery (in % or ‘not applicable’ if the product has no heat recovery system);
maximum flow rate in m3/h;
electric power input of the fan drive, including any motor control equipment, at maximum flow rate (W);
sound power level (LWA), rounded to the nearest integer;
reference flow rate in m3/s;
reference pressure difference in Pa;
SPI in W/(m3/h);
control factor and control typology in accordance with the relevant definitions and classification in Annex VIII Table 1;
declared maximum internal and external leakage rates (%) for bidirectional ventilation units or carry over (for regenerative heat exchangers only), and external leakage rates (%) for ducted unidirectional ventilation units;
mixing rate of non-ducted bidirectional ventilation units not intended to be equipped with one duct connection on either supply or extract air side;
position and description of visual filter warning for RVUs intended for use with filters, including text pointing out the importance of regular filter changes for performance and energy efficiency of the unit;
for unidirectional ventilation systems, instructions to install regulated supply/exhaust grilles in the façade for natural air supply/extraction;
internet address for pre-/dis-assembly instructions;
for non-ducted units only: the airflow sensitivity to pressure variations at + 20 Pa and – 20 Pa;
for non-ducted units only: the indoor/outdoor air tightness in m3/h;
the annual electricity consumption (AEC) (in kWh electricity/a);
the annual heating saved (AHS) (in kWh primary energy/a) for each type of climate (‘average’, ‘warm’, ‘cold’).
The technical documentation referred to in Article 3(1)(c) shall include at least the following:
the name and address of the supplier;
supplier's model identifier i.e. the code, usually alphanumeric, used to distinguish a specific residential ventilation unit model from other models with the same trade mark or supplier's name;
where appropriate, the references of the harmonised standards applied;
where appropriate, the other calculation methods, measurement standards and specifications used;
identification and signature of the person empowered to bind the supplier;
where appropriate, the technical parameters for measurements, established in accordance with Annex VIII;
overall dimensions;
specification of the type of RVU;
the specific energy consumption class of the model as defined in Annex II;
the specific energy consumption (SEC) for each applicable climate zone;
sound power level (LWA);
the results of calculations carried out in accordance with Annex VIII.
Suppliers may include additional information at the end of the above list.
the specific energy consumption class of the model as defined in Annex II;
the specific energy consumption (SEC) in kWh/(m2.a) for each applicable climate zone;
the maximum flow rate (in m3/h);
sound power level (LWA) in dB(A) rounded to the nearest integer.
‘display mechanism’ means any screen, including tactile screen, or other visual technology used for displaying internet content to users;
‘nested display’ means a visual interface where an image or data set is accessed by a mouse click, mouse roll-over or tactile screen expansion of another image or data set;
‘tactile screen’ means a screen responding to touch, such as that of a tablet computer, slate computer or smartphone;
‘alternative text’ means text provided as an alternative to a graphic, allowing information to be presented in non-graphical form where display devices cannot render the graphic or as an aid to accessibility such as input to voice synthesis applications.
the image referred to in point 3 of this Annex is shown on the display mechanism in proximity to the price of the product;
the image links to the label;
the label is displayed after a mouse click, mouse roll-over or tactile screen expansion on the image;
the label is displayed by pop-up, new tab, new page or inset screen display;
for magnification of the label on tactile screens, the device conventions for tactile magnification apply;
display of the label is closed by means of a close option or other standard closing mechanism;
the alternative text for the graphic, to be displayed on failure to display the label, is the energy efficiency class of the product in the same font size as that used for the price.
where:
SEC is the specific energy consumption for ventilation per m2 heated floor area of a dwelling or building [kWh/m2.a];
ta is annual operating hours [h/a];
pef is the primary energy factor for electric power generation and distribution [-];
qnet is net ventilation rate demand per m2 heated floor area [m3/h.m2];
MISC is an aggregated general typology factor, incorporating factors for ventilation effectiveness, duct leakage and extra infiltration [-];
CTRL is the ventilation control factor [-];
x is an exponent that takes into account non-linearity between thermal energy and electricity saving, depending on motor and drive characteristics [-];
SPI is specific power input [kW/(m3/h)];
th is total hours heating season [h];
ΔΤh is the average difference in indoor (19 °C) and outdoor temperature over a heating season, minus 3 K correction for solar and internal gains [K];
ηh is the average space heating efficiency [-];
cair is the specific heat capacity of air at constant pressure and density [kWh/(m3 K)];
qref is the reference natural ventilation rate per m2 heated floor area [m3/h.m2];
ηt is the thermal efficiency of heat recovery [-];
Qdefr is the annual heating energy per m2 heated floor area [kWh/m2.a] for defrosting, based on a variable electric resistance heating.
where:
tdefr is the duration of the defrosting period, i.e. when the outdoor temperature is below – 4 °C [h/a]; and
ΔΤdefr is the average difference in K between the outdoor temperature and – 4 °C during the defrosting period.
Qdefr applies only to bidirectional units with recuperative heat exchanger; for unidirectional units or units with regenerative heat exchangers, Qdefr = 0.
SPI and ηt are values derived from tests and calculation methods.
Other parameters and their defaults are given in Table 1. The SEC for label classification is based on the ‘average’ climate.
SEC calculation parameters
a Defrosting applies only to bidirectional units with recuperative heat exchanger and is calculated as Qdefr = tdefr*Δtdefr*cair*qnet*pef. For unidirectional units or units with regenerative heat exchangers, Qdefr = 0 | |||||
general typology | MISC | ||||
---|---|---|---|---|---|
Ducted ventilation units | 1,1 | ||||
Non-ducted ventilation units | 1,21 | ||||
ventilation control | CTRL | ||||
Manual control (no DCV) | 1 | ||||
Clock control (no DCV) | 0,95 | ||||
Central demand control | 0,85 | ||||
Local demand control | 0,65 | ||||
motor & drive | x-value | ||||
on/off & single speed | 1 | ||||
2-speed | 1,2 | ||||
3-speed | 1,5 | ||||
variable speed | 2 | ||||
Climate | th in h | ΔΤh in K | tdefr in h | ΔΤdefr in K | Qdefr ain kWh/a.m2 |
Cold | 6 552 | 14,5 | 1 003 | 5,2 | 5,82 |
Average | 5 112 | 9,5 | 168 | 2,4 | 0,45 |
Warm | 4 392 | 5 | — | — | — |
Defaults | value | ||||
specific heat capacity of air, cair in kWh/(m3K) | 0,000344 | ||||
net ventilation requirement per m2 heated floor area, qnet in m3/h.m2 | 1,3 | ||||
reference natural ventilation rate per m2 heated floor area, qref in m3/h.m2 | 2,2 | ||||
annual operating hours, ta in h | 8 760 | ||||
primary energy factor electric power generation & distribution, pef | 2,5 | ||||
space heating efficiency, ηh | 75 % |
For the purposes of checking conformity with the requirements laid down in Annex II, Member State authorities shall test a single RVU. If the measured values or values calculated on the basis of measured values do not match the manufacturer's declared values within the meaning of Article 3, subject to the tolerances in Table 1, measurements shall be carried out on three other units.
If the arithmetic mean of the measured values for these units does not meet the requirements, subject to the tolerances in Table 1, the model and all other equivalent models shall be considered not to comply with the requirements of Annex II.
The Member State authorities shall provide the test results and other relevant information to the authorities of the other Member States and to the Commission within one month of the decision being taken on the non-compliance of the model.
Member State authorities shall use the measurement and calculation methods in Annex VIII.
Parameter | Verification tolerances |
---|---|
SPI | The measured value shall be no more than 1,07 times the maximum declared value. |
Thermal efficiency RVU | The measured value shall be no less than 0,93 times the minimum declared value. |
Sound power level | The measured value shall be no more than the maximum declared value plus 2 dB. |
The verification tolerances defined in this Annex relate only to the verification of the measured parameters by Member State authorities and shall not be used by the supplier as an allowed tolerance to establish values in the technical documentation. The values and classes on the label or in the (electronic) product fiche shall not be more favourable for the supplier than the values reported in the technical documentation.