Air Leakage/Pressure Tests for New Properties and EPC’s for Your Sale or Rental Property

New Dwelling Design/Redevelopment SAP EPC Service

Mike Murphy (Ynni Cymru Energy Solutions Ltd) - I am an independent and fully qualified On-Construction Domestic Energy Assessor (OCDEA) living in Swansea. I have more than 40 years experience in the Construction Industry. I will cover a 80 mile radius of Swansea and wider for an additional charge.

About SAP EPCs

EPCs are known as Energy Performance Certificates or Domestic Energy Assessments

A SAP EPC refers to an Energy Performance Certificate issued by an ‘On Construction Domestic Energy Assessor’ or SAP assessor, using (ocassionally) SAP 2005, SAP 2009 methodology and software - the current version of SAP 2012 is in use for current designs.

A new dwelling, or dwellings created by conversion/change of use are compulsory to have SAP Calculations carried out. The assessor will then in turn produce an EPC outlining the energy efficiency of that property.

The assessor will use architects plans and drawings, together with detailed information (specifications) around construction, heating and ventilation amongst others.

The two versions of EPC are fundamentally the same thing (the SAP EPC being much more time consuming and needs a very good knowledge of construction), providing a picture of the energy efficiency and energy costs of the dwelling.

Generally, an EPC for an existing dwelling for sale or rental will be much less expensive to purchase than one derived from SAP Calculations.


For a competitive quote call (landline) 01792 424569; (mobile) 07986 099438 or email

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