The DEA will carry out a 'non-intrusive' inspection of your home which for Flats and Maisonettes typically take less than 1 hour.


During the visit to the property, information is collected relating to the construction type such as Cavity Wall, Solid Brick Wall or (Timber Frame - often found in Room in the Roof extensions).


Details of the Heating & Hot water systems, Insulation in the external walls, Loft, Windows and Lighting systems are included.


Places where heat can escape such as open flues, draft proofing of external doors or widows and additional heating systems such as Gas, Electric and Wood/Coal (etc) Burning fires are noted.


The Heated space is determined by taking the dimensions of the property.


New technologies such as Renewable Energy and Low Carbon are included where present. Examples would be Solar Panels, Solar Water, Wind Turbines and Biomass heaters.


The Data collected is then processed using Government approved RdSAP software to produce an Energy Performance Certificate. The completed certificate will show the properties (EER) Energy Efficiency Rating and (EIR) Environmental Impact Rating.


Energy Efficiency Rating (EER) − based on fuel costs.


Environmental Impact Rating (EIR) − based on carbon emissions.


The above Energy Ratings are determined mathematically by the software which are included on the EPC report.


Energy efficient improvements in the form of Recommendations are also included in the EPC report and each Recommendation is itemised together with a value that shows the extent to which the Rating would increase.

The Rating increase value is also determined mathematically where the amount of the increase provides an idea of relative importance for each Recommendation.


Where improvements are carried out based on Recommendations a revised EPC can be issued to reflect the new Rating value.


All issued EPCs are lodged on a Government database and are valid for 10 years.