# Commission Regulation (EU) No 1253/2014 of 7 July 2014 implementing Directive 2009/125/EC of the European Parliament and of the Council with regard to ecodesign requirements for ventilation units (Text with EEA relevance), Division 1: From 1 January 2016:

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

All ventilation units, except dual use units, shall be equipped with a multi-speed drive or a variable speed drive.
All BVUs shall have a HRS.
The HRS shall have a thermal by-pass facility.
The minimum thermal efficiency ηt_nrvu of all HRS except run-around HRS in BVUs shall be 67 % and the efficiency bonus E = (ηt_nrvu – 0,67) * 3 000 if the thermal efficiency ηt_nrvu is at least 67 %, otherwise E = 0.
The minimum thermal efficiency ηt_nrvu of run-around HRS in BVUs shall be 63 % and the efficiency bonus E = (ηt_nrvu – 0,63) * 3 000 if the thermal efficiency ηt_nrvu is at least 63 %, otherwise E = 0.
The minimum fan efficiency for UVUs (ηνu ) is
6,2 % * ln(P) + 35,0 % if P ≤ 30 kW and
56,1 % if P > 30 kW.
The maximum internal specific fan power of ventilation components (SFPint_limit ) in W/(m3/s) is
for a BVU with run-around HRS
1 700 + E – 300 * qnom /2 – F if qnom < 2 m3/s and
1 400 + E – F if qnom ≥ 2 m3/s;
for a BVU with other HRS
1 200 + E – 300 * qnom /2 – F if qnom < 2 m3/s and
900 + E – F if qnom ≥ 2 m3/s;
250 for an UVU intended to be used with a filter.

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Source: https://www.legislation.gov.uk/eur/2014/1253/annex/III/division/1 (the official version)
Page: https://openlegislation.uk/eu-regulation-2014-1253/annex-III/division-1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.