Your estimate Showing a typical 3-bed semi-d, 1978–1999, oil heating, BER unknown. Change the answers for your home.
Typical installed cost €16,500–€23,000
Heat pump grant −€10,500
Central heating grant −€2,000
Boiler scrappage grant −€2,000
SEAI grant up to −€14,500
You pay, after the grant
€2,000–€8,500
Some qualifying homes with lower-cost installations could have little or nothing to pay, but many retrofits still need a contribution. Your grant depends on the heating you remove, your installer's design and the final cost, and it never exceeds the cost of the works.
A technical assessment is needed before applying (homes built before 2007), unless your BER shows a Heat Loss Indicator of 2.3 or less. Checked 09/10/2026 · seai.ie
Running costs a year At the Irish field-trial average efficiency (SPF 3.22), about €690 a year.
The range runs from SPF 2.5 (a poorly designed or set-up system) to 4 (a very good one), at 34.38c/kWh, excluding standing charges. A smart or night tariff helps most when you shift hot water and some heating to cheap hours; a heat pump runs best long and low, so not all of it can move.
Payback on running costs
Not certain
Savings depend on your tariff and how well the system is designed, so payback on running costs alone isn't certain.
Checked 09/10/2026 · seai.ie
Is the home suitable? Likely straightforward
Either your Heat Loss Indicator meets SEAI's threshold or the home was built from 2007, so it usually needs no technical assessment. Your installer still sizes the system from a room-by-room heat loss.
Needs a technical check
Homes built before 2007 need SEAI's technical assessment unless the BER shows a Heat Loss Indicator at or under the threshold. Many older homes, including stone and solid-wall ones, work well once the heat loss is known.
Next: A technical assessment (€200 grant) shows exactly what's needed.
Likely needs fabric or heating work
Your certificate shows high heat loss, so some insulation or radiator work may come first. That isn't a no: it means the design has to deal with it.
Next: A technical assessment (€200 grant) shows exactly what's needed.
Open the full calculator→ Copy a link to these results