The Dwelling Energy Assessment Procedure is Ireland's official method for calculating the Building Energy Rating of new and existing dwellings.
Dwelling Energy Assessment Procedure (DEAP) is a software and manual which calculates energy consumption and carbon dioxide emissions. It considers space heating, ventilation, water heating, and lighting in a dwelling. DEAP is free to download but be sure to view the terms and conditions within the links below before downloading.
DEAP is used by registered BER Assessors to calculate the BER of new and existing dwellings and to demonstrate compliance with aspects of the Building Regulations. You can learn how to use DEAP by undertaking a training course and registering as a BER assessor.
There are two versions of the DEAP software available to BER Assessors. Either of these versions of DEAP can be used for the completion of BER Assessments.
NZEB Calculation Methodology and DEAP 4.2.0 Workbook for Dwellings
Key Changes to DEAP 4.2.0
- Changes to the renewable contribution calculation for new dwelling Part L compliance
- renewable Energy Ratio (RER)
- TGD L 2019 compliance checks for new dwellings
- Changes to the water heating energy demand calculation to take account of
- updated occupancy rates
- shower types and presence of baths
- electricity used by electric showers
- low water use fittings (refer to Appendix I of DEAP Manual 4.2.0 draft for water efficiency calculation methodology)
- Changes to the lighting demand calculation to take account of
- different lighting designs
- new high-performance light fittings such as LEDs
- Changes to the ventilation heat loss calculation to take account of
- uninsulated MVHR ductwork outside of the dwelling thermal envelope
- exhaust air heat pumps and air flow rate for RER calculation
DEAP 4.2.0 Draft Manual and Workbook
DEAP Version 3.2.1 must be used by DEAP Assessors when demonstrating compliance with previous versions of Irish Building Regulations Part L 2005, 2008, and 2011 and/or when publishing BER assessments. DEAP (Version 4.2.0 (draft)) is to be used to assist in demonstrating compliance with Irish Building Regulations Part L 2019. DEAP (Version 4.2.0) the online tool will incorporate publication of BER assessments and compliance checks for Irish Building Regulations Part L 2005, 2008, 2011 and 2019 and will be available in Q3 2019.
DEAP 4.2.0 Draft Manual
This document describes DEAP 2019, Version 4.2.0 (draft), dated May 2019. This version is applicable to new and existing dwellings and is a draft version specifically to assist with compliance checking for Part L of the Building Regulations 2019. The previous DEAP Manual (Version 3.2.1) must be used by DEAP Assessors when demonstrating compliance with previous versions of Part L of the Building Regulations or publishing BER assessments on SEAI’s National Administration System until notified otherwise by SEAI.
DEAP 4.2.0 Workbook
Survey Guide and Form
TDG L 2019 Workbook Examples
The following workbooks represent the 6 worked examples in Appendix E of the Part L and European Union (Energy Performance of Buildings) Regulations 2019 Technical Guidance Document.
DEAP tools and information
Introduction to DEAP
This document describes the principles of DEAP for those involved in the research, design, construction or retrofit of dwellings. It is also useful for anyone wishing to understand the technical basis for BER certificates and Advisory Reports.
We recommend that you consult the DEAP Technical Bulletins before contacting us.
The tool below is a calculator that accepts inputs from DEAP and the heat pump system designer/installer, and then produces outputs to include in DEAP.
The methodology to assess heat pumps in DEAP was updated based on the Ecodesign (2009/125/EC) and Labelling (2010/30/EU) European directives. The guidance here supersedes Appendix G of DEAP Manual (v3.2.1) - July 2012.
The sign off form is be completed by the heating system designer/installer for the dwelling being assessed.
Heat pumps Consultation
SEAI sought feedback via a public consultation on proposed changes to the methodology and calculations for heat pumps entered in DEAP assessments for BERs and Part L compliance checking in dwellings. The consultation period ended on the 17th of May.
DEAP Survey (v2.1) - January 2012
This guidance and survey form is designed to assist BER Assessors record the survey information necessary for input into the DEAP software.
Solar Space Heating - Group Systems
This guidance and calculator helps BER assessors determine the solar contribution from a group solar space heating system that applies to an individual dwelling linked to that system.
Solar Space Heating - Individual Systems
This guidance and calculator helps BER assessors account for the contribution of active solar thermal systems to both domestic hot water and space heating requirements of a dwelling.
This guidance and application helps BER assessors to calculate a non-default Thermal Bridging Factor for use in DEAP.
- DEAP Electricity Factors provides current and historical electricity primary energy and carbon dioxide factors for inclusion in DEAP calculations.
- Domestic Fuel Cost Comparison provides information on the comparison of energy costs and the comparison of useful energy costs for space heating.
- National BER Research Tool gives researchers access to statistical data from the BER scheme.
- Domestic BER Statistics are updated monthly and show the total number of BERs published in Ireland.
- Request for SEAI Property Reference Number (Form FO11)
- Direct Debit Mandate
- BER Insurance Form
- BER Domestic Assessor Videos