Dwellings Energy Assessment Procedure (DEAP)

The DEAP manual describes the Dwelling Energy Assessment Procedure (DEAP), which is the Irish official procedure for calculating and assessing the energy performance of dwellings. DEAP calculates the energy performance of new and existing dwellings. The procedure takes account of the energy required for space heating, ventilation, water heating and lighting, less savings from energy generation technologies. For standardised occupancy, it calculates annual values of delivered energy consumption, primary energy consumption, carbon dioxide emissions and costs, both totals and per square metre of total floor area of the dwelling.

The DEAP methodology for heat pumps has been updated (FEB 2016) and is available here

The Introduction to DEAP for Professionals describes the principles of DEAP for those involved in building research or the design, construction or retrofit of dwellings. This document is also useful for anyone wishing to understand the technical basis for BER certificates and Advisory Reports.

The DEAP methodology public consultation is available here

DEAP Software 3.2.1 2012, Manual, Survey Guide including TGD L 2005-2011 conformance information

DEAP Software Version 3.2.1 Release Notes and Download Details

DEAP Manual Version 3.2.1 (July 2012)

DEAP Survey Guide Version 2.1 (January 2012)

DEAP Survey Form Version 2.1 (January 2012)

DEAP Survey Form Excel Version 2.1 (January 2012)

DEAP Version 3.2 Calculation - Excel Version.xlsx (size 213 KB)

DEAP Appendix Q

DEAP Appendix Q Specific Features can be found in this section of the DEAP FAQ


The DEAP methodology as set out in the DEAP software application is separated into 12 sections or modules.  FAQs relating to DEAP are grouped according to the section they relate to. The DEAP FAQ is located here

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