# The Environmental Authorisations (Scotland) Regulations 2018, Paragraph 11: Calculation of efficiency reference values


(1) SEPA must determine harmonised efficiency reference values as a matrix of values differentiated by relevant factors and taking into account the principles in sub-paragraph (3).
(2) The efficiency reference values for separate production of heat and electricity in accordance with the formula in paragraph 10(3) must establish the operating efficiency of the separate heat and electricity production that cogeneration is intended to substitute.
(3) Efficiency reference values are to be calculated according to the following principles—
(a) for cogeneration units the comparison with separate electricity production is to be based on the principle that the same fuel categories are compared,
(b) each cogeneration unit is to be compared with the best available and economically justifiable technology for separate production of heat and electricity on the market in the year of construction of the cogeneration unit,
(c) the efficiency reference values for cogeneration units older than 10 years of age are to be fixed on the reference values of units of 10 years of age,
(d) the efficiency reference values for separate electricity production and heat production are to take into account the Scottish climate.

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Source: https://www.legislation.gov.uk/ssi/2018/219/schedule/25/paragraph/11 (the official version)
Page: https://openlegislation.uk/environmental-authorisations-scotland-regulations-2018/schedule-25/paragraph-11
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.