ηwh
as defined in Commission Regulation (EU) No 813/2013 of 2 August 2013 implementing Directive…, Article 2, point (21) (Definitions)
the ratio between the useful energy in the drinking or sanitary water provided by a combination heater and the energy required for its generation, expressed in %;
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Also defined in
- Commission Delegated Regulation (EU) No 812/2013 of 18 February 2013 supplementing Directive 2010/30/EU of the European… 32013R0812, Article 2, point (14)
the ratio between the useful energy provided by a water heater or a package of water heater and solar device and the energy required for its generation, expressed in %; - Commission Regulation (EU) No 814/2013 of 2 August 2013 implementing Directive 2009/125/EC of the European Parliament… 02013R0814-20170109, Article 2, point (15)
the ratio between the useful energy provided by a water heater and the energy required for its generation, expressed in %;