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BER / NZEB Compliance
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BER / NZEB Compliance
Part L fabric & energy performance screening — Ireland (TGD Part L 2022) and UK (AD Part L 2021)
Country
🇮🇪 Ireland
🇬🇧 England
Build Type
New Build
Existing/Renovation
Building Scope
Dwelling
Non-Domestic
🇮🇪
Active Regulation
TGD Part L 2022 — New Dwellings (NZEB)
SI 526 of 2022 · Verified 2026-06-15
CURRENT
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Fabric U-values
W/m²K (whole element)
External Wall
(W/m²K)
Limit: 0.18 W/m²K
Roof
(W/m²K)
Limit: 0.16 W/m²K
Ground Floor
(W/m²K)
Limit: 0.18 W/m²K
Windows / Glazing
(W/m²K)
Limit: 1.40 W/m²K
External Doors
(W/m²K)
Same limit as windows
Air Permeability
(m³/(h·m²) @50Pa)
Limit: 5.0
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Energy Performance (DEAP)
EPC (Energy Performance Coefficient)
From DEAP output — limit ≤0.30 (TGD L S.2.3.1)
CPC (Carbon Performance Coefficient)
From DEAP output — limit ≤0.35 (TGD L S.2.3.2)
Primary Heating System (for RER)
Indicative — confirm via DEAP (TGD L Section 3.1)
Heat Pump (ASHP/GSHP) — RER typically ≥0.20
Solar + Efficient Gas/Oil — RER may meet 0.20
Gas Boiler only — RER may fail
Oil Boiler only — RER likely fails
Biomass — RER typically meets 0.20
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