Passivhaus Affiliate

EPCs as efficiency targets

As many seek to assess progress towards a net-zero built environment, the Trust researched using Energy Performance Certificates (EPC) as efficiency targets. 

Energy Performance Certificate

Since every home in the UK has an EPC that rates a building's energy efficiency between 1 and 100, it may seem sensible to use the EPC as a metric to drive lower emissions. However, EPCs are not currently designed to do this; They are a compliance tool which means that the supporting calculation has necessary assumptions and limitations.

EPCs also fail to keep pace with a rapidly decarbonising grid. As of 2020, electricity emissions are 30% less than those associated with gas. Yet, the EPC calculation still assumes electricity produces more than twice the level of emissions. 

This report illustrates why the success of using the EPC rating to drive energy efficiency is doubtful, and suggests alternatives that may produce better results.

EPCs as efficiency targets

 

 

Futher Information

EPC's as efficiency targets

 

As many seek to assess progress towards a net-zero built environment, the Trust has produced a short research report on using Energy Performance Certificates (EPC) as efficiency targets.

 

Since every home in the UK has an EPC that rates a building's energy efficiency between 1 and 100, it may seem sensible to use the EPC as a metric to drive lower emissions. However, EPCs are not currently designed to do this; They also fail to keep pace with a rapidly decarbonising grid. As of 2020, electricity emissions are 30% less than those associated with gas. Yet, the EPC calculation still assumes electricity produces more than twice the level of emissions.

 

EPCs are designed as compliance tools which means that the supporting calculation has necessary assumptions and limitations. The effectiveness of using the EPC rating to drive energy efficiency is doubtful. To illustrate why, and to suggest an alternative, this short paper sets out how EPC's work, their limitations and options that may produce better results.

20th April 2020


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