# Commission Delegated Regulation (EU) No 1254/2014 of 11 July 2014 supplementing Directive 2010/30/EU of the European Parliament and of the Council with regard to energy labelling of residential ventilation units (Text with EEA relevance), Division 2: The annual electricity consumption per 100 m2 floor area (AEC) (in kWh/a electric per year); and the annual heating saved ((AHS), which means the annual saving in consumption of energy for heating (in kWh fuel gross calorific value per year) are calculated as follows, using the definitions in point 1, and the default values given in Table 1, for each type of climate (average, warm and cold):

Extent: E+W+S+N.I.

AEC = t a × q net × MISC × CTRL x × SPI + Q defr ;
AHS = t h × ΔΤ h × η – 1 h × c air × q ref − q net × CTRL × MISC × 1 − η t .
Table 1
SEC calculation parameters
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 in 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 %

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Source: https://www.legislation.gov.uk/eur/2014/1254/annex/VIII/division/2 (the official version)
Page: https://openlegislation.uk/eu-regulation-2014-1254/annex-VIII/division-2
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.