IDEA Ltd offer a range of services and advice that cover the different sectors of energy assessment and certification. See the details below of the services we offer and when they are required.
Domestic EPCs

Domestic Energy Performance Certificates (EPCs) are the type of certificate that most people are familiar with. These were introduced in 2007 to give an indication of the energy efficiency of a house or flat. The domestic EPC is sometimes referred to as an RDSAP EPC, this indicates that it is a Reduced Data Standard Assessment Procedure analysis, in other words a simplified version of the process used on new build houses.

An EPC is required by law whenever a house or flat is marketed or sold. If the property is being rented, the EPC is required when there is a change of tenant. The EPC rating must be displayed on any marketing material for a property.

An EPC will also be required if a property is being assessed with a view to a PV installation so that the Feed In Tariff can be calculated.

Currently EPCs are valid for a period of ten years, however if improvements are made to the property the owner may wish to commission a revised EPC before the end of this period to reflect the improved rating.

Commercial EPCs

Commercial (or non-domestic) Energy Performance Certificates (EPCs) are produced for the same reasons as domestic EPCs. A commercial EPC assessment is notably more detailed than a domestic EPC.

These were introduced in 2008 so as to give an indication of the energy efficiency of a commercial building (offices, warehouses, shops, factories etc).

An EPC is required by law whenever a building is marketed or sold. If the property is being rented, the EPC is required when there is a change of tenant. The EPC rating must be displayed on any marketing material for a property. An EPC will also be required if a property is being assessed with a view to a PV installation so that the Feed In Tariff can be calculated.

Currently EPCs are valid for a period of ten years, however if improvements are made to the building the owner may wish to commission a revised EPC before the end of this period to reflect the improved rating.

On Construction EPCs
(SAP calculations)

Building Regulations (Part L1A) states that SAP calculations have to be carried out when new dwellings are built, whilst conversions, renovations and extensions require L1b compliance.

Our extensive experience has enabled us to carry out these assessments and also to advise how compliance may be achieved if it is not achieved initially. we are experienced in working with all versions of SAP since 2005, the latest being the basis of the 2013 Building Regulations.

We are fully accredited to issue Predictive Energy Assessments (PEAs) and On construction Energy Performance Certificates (OC EPCs). All calculations are carried out using Elmhurst Energy Systems Design SAP 2012 software. All assessments are accompanied by a client letter along with the required documentation.

The assessment is carried out from plans and building specifications supplied by clients.

DECs – Display Energy Certificates  

All public buildings over 250 square metres require a Display Energy Certificate (DEC). This needs to be displayed in a prominent position. In addition to this an Advisory Report is required in the first year, which lists cost-effective measures to improve the energy rating of the building.

The DEC is an operational rating and reflects the energy usage per square metre, unlike a Commercial EPC which is an Asset Rating and reflects the inherent energy properties of the building.

For buildings 250-999 metres square DECs and Advisory Reports are required to be renewed every 10 years. For buildings over 1000 metre square DECs and Advisory Reports are required to be renewed annually.

Bank House,
Longden,

Shropshire,
SY5 8ES

01743 718346
07999 866376

idea@idea-ingham.co.uk

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