BER Requirements for Heat Pump Grant Eligibility (2026)
BER and Heat Loss Indicator requirements for heat pump grants in Ireland, including HLI thresholds, typical BER outcomes, assessment costs and common fabric upgrades.
Grant eligibility target: HLI ≤ 2.0 W/K per m²
The Key Requirement Is HLI
The source page explains that the formal technical requirement for SEAI heat-pump grant eligibility is the Heat Loss Indicator (HLI), not a particular BER letter alone.
The home must achieve HLI ≤ 2.0 W/K per m².
Homes above this threshold generally need fabric improvements before a heat pump grant can be approved.
Typical HLI Levels
Older uninsulated homes: 3.5–5.0
Partially upgraded: 2.5–3.5
Modern insulated: 1.5–2.5
Highly efficient: below 1.5
BER & HLI
Typical BER Relationship
E/F: very unlikely to meet HLI ≤ 2.0
D2–D1: usually needs upgrades
C3–C2: often achievable with minor upgrades
B ratings: typically compliant
What HLI Measures
Walls, roof and floor insulation
Window performance and air leakage
The result is expressed as watts of heat loss per m² per degree of temperature difference.
Common Upgrades Needed to Meet HLI
| Upgrade | Typical Cost |
|---|---|
| Attic insulation | €800–€1,800 |
| Cavity wall insulation | €1,500–€3,500 |
| External wall insulation | €12,000–€30,000 |
| Window replacement | €4,000–€12,000 |
| Floor insulation | €2,000–€6,000 |
The source page summarises likely pre-install upgrade cost at around €1,000–€15,000, depending on the condition of the home.
Technical Assessment
SEAI requires a technical assessment to confirm the heat-loss position and heating-system design.
The assessment includes the heat-loss calculation, radiator sizing and heat-pump capacity planning.
Typical assessment cost on the source page is €200–€500.
Example Eligibility Upgrade Scenario
| Item | Cost |
|---|---|
| Heat-pump installation | €18,000 |
| Attic insulation | €1,200 |
| Cavity insulation | €2,000 |
| Total project cost | €21,200 |
| SEAI heat-pump grant | €6,500 |
| Net cost after grant | €14,700 |
This example shows how the cost of achieving the required HLI can materially change the overall heat-pump budget.
Assessment, Sequence & Older Homes
Grant Sequence
BER review → technical heat-loss calculation → grant application → approval → installation → post-works BER → grant payment.
Approval must come before installation.
Why Low HLI Matters
Lower heat loss allows lower flow temperatures and steadier indoor temperatures.
It also reduces electricity consumption.
Older Housing Stock
Many pre-2000 Irish homes have weak attic insulation, uninsulated cavities, older windows or high air leakage.
These are common reasons for needing retrofit work first.
Summary
For SEAI heat-pump grant eligibility, the source page gives a target of HLI ≤ 2.0 W/K per m².
BER letters are a useful indicator, but HLI is the key technical measure.
Homes that do not meet the threshold may need around €1,000–€15,000 of fabric upgrades before installation.
Other resources:
SEAI Heat Pump Grant Explained
Required Upgrades – Before Installation
Radiators vs Underfloor Comparison