Highest: Donegal
72%
Lowest: Dublin
≈5%
Have a heat pump, national
15%
All shares are of BER-rated dwellings, CSO Domestic Building Energy Ratings Q2 2026, released 26 August 2026.
Oil was the main space heating fuel in 34% of BER-rated dwellings nationally, level with mains gas at 34% (461,681 and 461,634 dwellings).1By county the picture is very different: oil was the main fuel in at least half of BER-rated dwellings in 15 counties, led by Donegal at 72%, while in Dublin it was ≈5%, where mains gas dominates. Use the table below to compare any county, or read what it means for the cost of switching in our 2026 heat pump cost report.
What these figures measure
Every home that's sold, let or gets an SEAI grant needs a Building Energy Rating (BER). The CSO counts the latest BER of each dwelling rated since 2009:1,367,605 dwellings up to the end of June 2026. The figures here describe those dwellings and the main space heating fuel the BER assessor recorded.
Read the figures as BER-rated dwellings, not all homes
Homes that have never been sold, let or upgraded since 2009 may have no BER, and a BER records the heating at the time of the assessment. So write "oil was the main heating fuel in 72% of BER-rated dwellings in Donegal", not "72% of Donegal homes use oil". The CSO's Census measures all occupied households on a different basis and date, so don't compare the two directly.
Five counties need care. CSO publishes Dublin as Dublin 01–24 and Dublin County, and Cork, Galway, Limerick and Waterford as city and county. We combine those rows, weighting each by its number of BER-rated dwellings. Because CSO rounds each row to a whole number first, the combined figure can be up to half a point out, so we show it with ≈. The original 31 rows are in the downloads. The full method is on our methodology page.
Compare all 26 counties
Search, pick a county, or switch the chart between oil, gas, electricity and heat pumps. Column headings sort the table.
Explore the counties
26 of 26 counties shown
Bars show the measure chosen above, highest first. Lighter bars and ≈: city and county rows combined (approximate). The dashed line is the national figure.
| 1 | Donegal | 72% | 0% | 18% | 6% | 3% | 1% | 12% | 41,370 |
|---|---|---|---|---|---|---|---|---|---|
| 2 | Mayo | 68% | 3% | 21% | 7% | 2% | 0% | 10% | 36,336 |
| 3 | Roscommon | 67% | 4% | 18% | 8% | 3% | 0% | 10% | 16,646 |
| 4 | Leitrim | 65% | 1% | 21% | 9% | 5% | 0% | 7% | 10,150 |
| =5 | Cavan | 64% | 8% | 18% | 5% | 4% | 0% | 9% | 19,281 |
| =5 | Monaghan | 64% | 8% | 23% | 3% | 2% | 0% | 17% | 13,177 |
| 7 | Wexford | 63% | 1% | 27% | 7% | 2% | 0% | 15% | 45,112 |
| 8 | Sligo | 61% | 1% | 28% | 6% | 5% | 0% | 13% | 20,352 |
| =9 | Longford | 60% | 1% | 23% | 9% | 7% | 0% | 9% | 11,455 |
| =9 | Tipperary | 60% | 13% | 19% | 7% | 1% | 0% | 11% | 41,750 |
| 11 | Kerry | 59% | 1% | 28% | 8% | 4% | 1% | 13% | 41,855 |
| 12 | Galway | ≈55% | ≈9% | ≈30% | ≈5% | ≈2% | ≈0% | ≈13% | 72,088 |
| 13 | Clare | 54% | 12% | 24% | 8% | 2% | 0% | 11% | 32,469 |
| 14 | Westmeath | 51% | 12% | 25% | 9% | 3% | 0% | 13% | 24,893 |
| 15 | Offaly | 50% | 10% | 22% | 16% | 1% | 1% | 15% | 18,571 |
| 16 | Kilkenny | 46% | 24% | 23% | 5% | 2% | 0% | 17% | 22,413 |
| 17 | Carlow | 44% | 30% | 22% | 4% | 1% | 0% | 15% | 17,080 |
| 18 | Laois | 39% | 26% | 25% | 9% | 1% | 0% | 19% | 21,634 |
| 19 | Limerick | ≈37% | ≈35% | ≈23% | ≈5% | ≈1% | ≈1% | ≈11% | 56,055 |
| 20 | Waterford | ≈35% | ≈33% | ≈28% | ≈3% | ≈1% | ≈0% | ≈15% | 36,029 |
| =21 | Meath | 33% | 38% | 26% | 2% | 1% | 0% | 21% | 53,801 |
| =21 | Wicklow | 33% | 34% | 29% | 3% | 1% | 1% | 22% | 42,664 |
| 23 | Cork | ≈31% | ≈39% | ≈26% | ≈3% | ≈1% | ≈0% | ≈17% | 153,778 |
| 24 | Louth | 30% | 45% | 22% | 1% | 1% | 1% | 18% | 39,580 |
| 25 | Kildare | 29% | 39% | 30% | 2% | 1% | 0% | 23% | 64,394 |
| 26 | Dublin | ≈5% | ≈61% | ≈28% | ≈0% | ≈0% | ≈5% | ≈14% | 414,672 |
| Ireland (CSO total) | 34% | 34% | 26% | 4% | 1% | 2% | 15% | 1,367,605 |
Checked 14/10/2026 · cso.ie1
County by county
Each county has its own section you can link to directly, for example /research/heat-pump-statistics-by-county/#donegal.
Home heating in Carlow
Heating oil was the main space heating fuel in 44% of Carlow's 17,080 BER-rated dwellings: 17th highest of the 26 counties, and 10 points above the national figure of 34%.
- Mains gas
- 30% (national 34%)
- Electricity
- 22% (national 26%)
- Solid fuel
- 4% (national 4%)
- LPG
- 1% (national 1%)
- Group or district heating
- 0% (national 2%)
- Has a heat pump
- 15% (national 15%)
Heat pumps installed with SEAI grant support in Carlow: 231 since 2015, 19 in 2026 up to 31 August 2026.
SEAI-registered air to water heat pump contractors based in Carlow: 5 (counted 9 October 2026). Many also work in neighbouring counties, so this isn't a measure of local capacity.
Cite as: CSO, Domestic Building Energy Ratings Q2 2026, via HeatPumpInstallation.ie
Home heating in Cavan
Heating oil was the main space heating fuel in 64% of Cavan's 19,281 BER-rated dwellings: joint 5th highest of the 26 counties, and 30 points above the national figure of 34%.
- Mains gas
- 8% (national 34%)
- Electricity
- 18% (national 26%)
- Solid fuel
- 5% (national 4%)
- LPG
- 4% (national 1%)
- Group or district heating
- 0% (national 2%)
- Has a heat pump
- 9% (national 15%)
Heat pumps installed with SEAI grant support in Cavan: 302 since 2015, 43 in 2026 up to 31 August 2026.
SEAI-registered air to water heat pump contractors based in Cavan: 21 (counted 9 October 2026). Many also work in neighbouring counties, so this isn't a measure of local capacity.
Cite as: CSO, Domestic Building Energy Ratings Q2 2026, via HeatPumpInstallation.ie
Home heating in Clare
Heating oil was the main space heating fuel in 54% of Clare's 32,469 BER-rated dwellings: 13th highest of the 26 counties, and 20 points above the national figure of 34%.
- Mains gas
- 12% (national 34%)
- Electricity
- 24% (national 26%)
- Solid fuel
- 8% (national 4%)
- LPG
- 2% (national 1%)
- Group or district heating
- 0% (national 2%)
- Has a heat pump
- 11% (national 15%)
Heat pumps installed with SEAI grant support in Clare: 461 since 2015, 72 in 2026 up to 31 August 2026.
SEAI-registered air to water heat pump contractors based in Clare: 23 (counted 9 October 2026). Many also work in neighbouring counties, so this isn't a measure of local capacity.
Cite as: CSO, Domestic Building Energy Ratings Q2 2026, via HeatPumpInstallation.ie
Home heating in Cork
Heating oil was the main space heating fuel in ≈31% of Cork's 153,778 BER-rated dwellings: 23rd highest of the 26 counties, and 3 points below the national figure of 34%.
- Mains gas
- ≈39% (national 34%)
- Electricity
- ≈26% (national 26%)
- Solid fuel
- ≈3% (national 4%)
- LPG
- ≈1% (national 1%)
- Group or district heating
- ≈0% (national 2%)
- Has a heat pump
- ≈17% (national 15%)
Heat pumps installed with SEAI grant support in Cork: 2,776 since 2015, 364 in 2026 up to 31 August 2026.
SEAI-registered air to water heat pump contractors based in Cork: 54 (counted 9 October 2026). Many also work in neighbouring counties, so this isn't a measure of local capacity.
Cork combines CSO's Cork City and Cork County rows. Figures marked ≈ are our dwelling-weighted approximation of CSO's rounded percentages.
Cite as: CSO, Domestic Building Energy Ratings Q2 2026 (HeatPumpInstallation.ie combination of city and county rows), via HeatPumpInstallation.ie
Home heating in Donegal
Heating oil was the main space heating fuel in 72% of Donegal's 41,370 BER-rated dwellings: the highest share of the 26 counties, and 38 points above the national figure of 34%.
- Mains gas
- 0% (national 34%)
- Electricity
- 18% (national 26%)
- Solid fuel
- 6% (national 4%)
- LPG
- 3% (national 1%)
- Group or district heating
- 1% (national 2%)
- Has a heat pump
- 12% (national 15%)
Heat pumps installed with SEAI grant support in Donegal: 1,369 since 2015, 242 in 2026 up to 31 August 2026.
SEAI-registered air to water heat pump contractors based in Donegal: 39 (counted 9 October 2026). Many also work in neighbouring counties, so this isn't a measure of local capacity.
Cite as: CSO, Domestic Building Energy Ratings Q2 2026, via HeatPumpInstallation.ie
Home heating in Dublin
Heating oil was the main space heating fuel in ≈5% of Dublin's 414,672 BER-rated dwellings: the lowest share of the 26 counties, and 29 points below the national figure of 34%.
- Mains gas
- ≈61% (national 34%)
- Electricity
- ≈28% (national 26%)
- Solid fuel
- ≈0% (national 4%)
- LPG
- ≈0% (national 1%)
- Group or district heating
- ≈5% (national 2%)
- Has a heat pump
- ≈14% (national 15%)
Heat pumps installed with SEAI grant support in Dublin: 4,669 since 2015, 807 in 2026 up to 31 August 2026.
SEAI-registered air to water heat pump contractors based in Dublin: 101 (counted 9 October 2026). Many also work in neighbouring counties, so this isn't a measure of local capacity.
Dublin combines CSO's Dublin 01-24 and Dublin County rows. Figures marked ≈ are our dwelling-weighted approximation of CSO's rounded percentages.
Cite as: CSO, Domestic Building Energy Ratings Q2 2026 (HeatPumpInstallation.ie combination of city and county rows), via HeatPumpInstallation.ie
Home heating in Galway
Heating oil was the main space heating fuel in ≈55% of Galway's 72,088 BER-rated dwellings: 12th highest of the 26 counties, and 21 points above the national figure of 34%.
- Mains gas
- ≈9% (national 34%)
- Electricity
- ≈30% (national 26%)
- Solid fuel
- ≈5% (national 4%)
- LPG
- ≈2% (national 1%)
- Group or district heating
- ≈0% (national 2%)
- Has a heat pump
- ≈13% (national 15%)
Heat pumps installed with SEAI grant support in Galway: 1,340 since 2015, 163 in 2026 up to 31 August 2026.
SEAI-registered air to water heat pump contractors based in Galway: 49 (counted 9 October 2026). Many also work in neighbouring counties, so this isn't a measure of local capacity.
Galway combines CSO's Galway City and Galway County rows. Figures marked ≈ are our dwelling-weighted approximation of CSO's rounded percentages.
Cite as: CSO, Domestic Building Energy Ratings Q2 2026 (HeatPumpInstallation.ie combination of city and county rows), via HeatPumpInstallation.ie
Home heating in Kerry
Heating oil was the main space heating fuel in 59% of Kerry's 41,855 BER-rated dwellings: 11th highest of the 26 counties, and 25 points above the national figure of 34%.
- Mains gas
- 1% (national 34%)
- Electricity
- 28% (national 26%)
- Solid fuel
- 8% (national 4%)
- LPG
- 4% (national 1%)
- Group or district heating
- 1% (national 2%)
- Has a heat pump
- 13% (national 15%)
Heat pumps installed with SEAI grant support in Kerry: 1,146 since 2015, 115 in 2026 up to 31 August 2026.
SEAI-registered air to water heat pump contractors based in Kerry: 47 (counted 9 October 2026). Many also work in neighbouring counties, so this isn't a measure of local capacity.
Cite as: CSO, Domestic Building Energy Ratings Q2 2026, via HeatPumpInstallation.ie
Home heating in Kildare
Heating oil was the main space heating fuel in 29% of Kildare's 64,394 BER-rated dwellings: 25th highest of the 26 counties, and 5 points below the national figure of 34%.
- Mains gas
- 39% (national 34%)
- Electricity
- 30% (national 26%)
- Solid fuel
- 2% (national 4%)
- LPG
- 1% (national 1%)
- Group or district heating
- 0% (national 2%)
- Has a heat pump
- 23% (national 15%)
Heat pumps installed with SEAI grant support in Kildare: 687 since 2015, 104 in 2026 up to 31 August 2026.
SEAI-registered air to water heat pump contractors based in Kildare: 31 (counted 9 October 2026). Many also work in neighbouring counties, so this isn't a measure of local capacity.
Cite as: CSO, Domestic Building Energy Ratings Q2 2026, via HeatPumpInstallation.ie
Home heating in Kilkenny
Heating oil was the main space heating fuel in 46% of Kilkenny's 22,413 BER-rated dwellings: 16th highest of the 26 counties, and 12 points above the national figure of 34%.
- Mains gas
- 24% (national 34%)
- Electricity
- 23% (national 26%)
- Solid fuel
- 5% (national 4%)
- LPG
- 2% (national 1%)
- Group or district heating
- 0% (national 2%)
- Has a heat pump
- 17% (national 15%)
Heat pumps installed with SEAI grant support in Kilkenny: 378 since 2015, 42 in 2026 up to 31 August 2026.
SEAI-registered air to water heat pump contractors based in Kilkenny: 12 (counted 9 October 2026). Many also work in neighbouring counties, so this isn't a measure of local capacity.
Cite as: CSO, Domestic Building Energy Ratings Q2 2026, via HeatPumpInstallation.ie
Home heating in Laois
Heating oil was the main space heating fuel in 39% of Laois's 21,634 BER-rated dwellings: 18th highest of the 26 counties, and 5 points above the national figure of 34%.
- Mains gas
- 26% (national 34%)
- Electricity
- 25% (national 26%)
- Solid fuel
- 9% (national 4%)
- LPG
- 1% (national 1%)
- Group or district heating
- 0% (national 2%)
- Has a heat pump
- 19% (national 15%)
Heat pumps installed with SEAI grant support in Laois: 472 since 2015, 91 in 2026 up to 31 August 2026.
SEAI-registered air to water heat pump contractors based in Laois: 13 (counted 9 October 2026). Many also work in neighbouring counties, so this isn't a measure of local capacity.
Cite as: CSO, Domestic Building Energy Ratings Q2 2026, via HeatPumpInstallation.ie
Home heating in Leitrim
Heating oil was the main space heating fuel in 65% of Leitrim's 10,150 BER-rated dwellings: 4th highest of the 26 counties, and 31 points above the national figure of 34%.
- Mains gas
- 1% (national 34%)
- Electricity
- 21% (national 26%)
- Solid fuel
- 9% (national 4%)
- LPG
- 5% (national 1%)
- Group or district heating
- 0% (national 2%)
- Has a heat pump
- 7% (national 15%)
Heat pumps installed with SEAI grant support in Leitrim: 142 since 2015, 13 in 2026 up to 31 August 2026.
SEAI-registered air to water heat pump contractors based in Leitrim: 5 (counted 9 October 2026). Many also work in neighbouring counties, so this isn't a measure of local capacity.
Cite as: CSO, Domestic Building Energy Ratings Q2 2026, via HeatPumpInstallation.ie
Home heating in Limerick
Heating oil was the main space heating fuel in ≈37% of Limerick's 56,055 BER-rated dwellings: 19th highest of the 26 counties, and 3 points above the national figure of 34%.
- Mains gas
- ≈35% (national 34%)
- Electricity
- ≈23% (national 26%)
- Solid fuel
- ≈5% (national 4%)
- LPG
- ≈1% (national 1%)
- Group or district heating
- ≈1% (national 2%)
- Has a heat pump
- ≈11% (national 15%)
Heat pumps installed with SEAI grant support in Limerick: 1,083 since 2015, 98 in 2026 up to 31 August 2026.
SEAI-registered air to water heat pump contractors based in Limerick: 21 (counted 9 October 2026). Many also work in neighbouring counties, so this isn't a measure of local capacity.
Limerick combines CSO's Limerick City and Limerick County rows. Figures marked ≈ are our dwelling-weighted approximation of CSO's rounded percentages.
Cite as: CSO, Domestic Building Energy Ratings Q2 2026 (HeatPumpInstallation.ie combination of city and county rows), via HeatPumpInstallation.ie
Home heating in Longford
Heating oil was the main space heating fuel in 60% of Longford's 11,455 BER-rated dwellings: joint 9th highest of the 26 counties, and 26 points above the national figure of 34%.
- Mains gas
- 1% (national 34%)
- Electricity
- 23% (national 26%)
- Solid fuel
- 9% (national 4%)
- LPG
- 7% (national 1%)
- Group or district heating
- 0% (national 2%)
- Has a heat pump
- 9% (national 15%)
Heat pumps installed with SEAI grant support in Longford: 163 since 2015, 12 in 2026 up to 31 August 2026.
SEAI-registered air to water heat pump contractors based in Longford: 8 (counted 9 October 2026). Many also work in neighbouring counties, so this isn't a measure of local capacity.
Cite as: CSO, Domestic Building Energy Ratings Q2 2026, via HeatPumpInstallation.ie
Home heating in Louth
Heating oil was the main space heating fuel in 30% of Louth's 39,580 BER-rated dwellings: 24th highest of the 26 counties, and 4 points below the national figure of 34%.
- Mains gas
- 45% (national 34%)
- Electricity
- 22% (national 26%)
- Solid fuel
- 1% (national 4%)
- LPG
- 1% (national 1%)
- Group or district heating
- 1% (national 2%)
- Has a heat pump
- 18% (national 15%)
Heat pumps installed with SEAI grant support in Louth: 451 since 2015, 63 in 2026 up to 31 August 2026.
SEAI-registered air to water heat pump contractors based in Louth: 18 (counted 9 October 2026). Many also work in neighbouring counties, so this isn't a measure of local capacity.
Cite as: CSO, Domestic Building Energy Ratings Q2 2026, via HeatPumpInstallation.ie
Home heating in Mayo
Heating oil was the main space heating fuel in 68% of Mayo's 36,336 BER-rated dwellings: 2nd highest of the 26 counties, and 34 points above the national figure of 34%.
- Mains gas
- 3% (national 34%)
- Electricity
- 21% (national 26%)
- Solid fuel
- 7% (national 4%)
- LPG
- 2% (national 1%)
- Group or district heating
- 0% (national 2%)
- Has a heat pump
- 10% (national 15%)
Heat pumps installed with SEAI grant support in Mayo: 911 since 2015, 151 in 2026 up to 31 August 2026.
SEAI-registered air to water heat pump contractors based in Mayo: 35 (counted 9 October 2026). Many also work in neighbouring counties, so this isn't a measure of local capacity.
Cite as: CSO, Domestic Building Energy Ratings Q2 2026, via HeatPumpInstallation.ie
Home heating in Meath
Heating oil was the main space heating fuel in 33% of Meath's 53,801 BER-rated dwellings: joint 21st highest of the 26 counties, and 1 points below the national figure of 34%.
- Mains gas
- 38% (national 34%)
- Electricity
- 26% (national 26%)
- Solid fuel
- 2% (national 4%)
- LPG
- 1% (national 1%)
- Group or district heating
- 0% (national 2%)
- Has a heat pump
- 21% (national 15%)
Heat pumps installed with SEAI grant support in Meath: 515 since 2015, 83 in 2026 up to 31 August 2026.
SEAI-registered air to water heat pump contractors based in Meath: 34 (counted 9 October 2026). Many also work in neighbouring counties, so this isn't a measure of local capacity.
Cite as: CSO, Domestic Building Energy Ratings Q2 2026, via HeatPumpInstallation.ie
Home heating in Monaghan
Heating oil was the main space heating fuel in 64% of Monaghan's 13,177 BER-rated dwellings: joint 5th highest of the 26 counties, and 30 points above the national figure of 34%.
- Mains gas
- 8% (national 34%)
- Electricity
- 23% (national 26%)
- Solid fuel
- 3% (national 4%)
- LPG
- 2% (national 1%)
- Group or district heating
- 0% (national 2%)
- Has a heat pump
- 17% (national 15%)
Heat pumps installed with SEAI grant support in Monaghan: 168 since 2015, 24 in 2026 up to 31 August 2026.
SEAI-registered air to water heat pump contractors based in Monaghan: 19 (counted 9 October 2026). Many also work in neighbouring counties, so this isn't a measure of local capacity.
Cite as: CSO, Domestic Building Energy Ratings Q2 2026, via HeatPumpInstallation.ie
Home heating in Offaly
Heating oil was the main space heating fuel in 50% of Offaly's 18,571 BER-rated dwellings: 15th highest of the 26 counties, and 16 points above the national figure of 34%.
- Mains gas
- 10% (national 34%)
- Electricity
- 22% (national 26%)
- Solid fuel
- 16% (national 4%)
- LPG
- 1% (national 1%)
- Group or district heating
- 1% (national 2%)
- Has a heat pump
- 15% (national 15%)
Heat pumps installed with SEAI grant support in Offaly: 455 since 2015, 42 in 2026 up to 31 August 2026.
SEAI-registered air to water heat pump contractors based in Offaly: 19 (counted 9 October 2026). Many also work in neighbouring counties, so this isn't a measure of local capacity.
Cite as: CSO, Domestic Building Energy Ratings Q2 2026, via HeatPumpInstallation.ie
Home heating in Roscommon
Heating oil was the main space heating fuel in 67% of Roscommon's 16,646 BER-rated dwellings: 3rd highest of the 26 counties, and 33 points above the national figure of 34%.
- Mains gas
- 4% (national 34%)
- Electricity
- 18% (national 26%)
- Solid fuel
- 8% (national 4%)
- LPG
- 3% (national 1%)
- Group or district heating
- 0% (national 2%)
- Has a heat pump
- 10% (national 15%)
Heat pumps installed with SEAI grant support in Roscommon: 375 since 2015, 48 in 2026 up to 31 August 2026.
SEAI-registered air to water heat pump contractors based in Roscommon: 13 (counted 9 October 2026). Many also work in neighbouring counties, so this isn't a measure of local capacity.
Cite as: CSO, Domestic Building Energy Ratings Q2 2026, via HeatPumpInstallation.ie
Home heating in Sligo
Heating oil was the main space heating fuel in 61% of Sligo's 20,352 BER-rated dwellings: 8th highest of the 26 counties, and 27 points above the national figure of 34%.
- Mains gas
- 1% (national 34%)
- Electricity
- 28% (national 26%)
- Solid fuel
- 6% (national 4%)
- LPG
- 5% (national 1%)
- Group or district heating
- 0% (national 2%)
- Has a heat pump
- 13% (national 15%)
Heat pumps installed with SEAI grant support in Sligo: 561 since 2015, 54 in 2026 up to 31 August 2026.
SEAI-registered air to water heat pump contractors based in Sligo: 18 (counted 9 October 2026). Many also work in neighbouring counties, so this isn't a measure of local capacity.
Cite as: CSO, Domestic Building Energy Ratings Q2 2026, via HeatPumpInstallation.ie
Home heating in Tipperary
Heating oil was the main space heating fuel in 60% of Tipperary's 41,750 BER-rated dwellings: joint 9th highest of the 26 counties, and 26 points above the national figure of 34%.
- Mains gas
- 13% (national 34%)
- Electricity
- 19% (national 26%)
- Solid fuel
- 7% (national 4%)
- LPG
- 1% (national 1%)
- Group or district heating
- 0% (national 2%)
- Has a heat pump
- 11% (national 15%)
Heat pumps installed with SEAI grant support in Tipperary: 1,176 since 2015, 94 in 2026 up to 31 August 2026.
SEAI-registered air to water heat pump contractors based in Tipperary: 21 (counted 9 October 2026). Many also work in neighbouring counties, so this isn't a measure of local capacity.
Cite as: CSO, Domestic Building Energy Ratings Q2 2026, via HeatPumpInstallation.ie
Home heating in Waterford
Heating oil was the main space heating fuel in ≈35% of Waterford's 36,029 BER-rated dwellings: 20th highest of the 26 counties, and 1 points above the national figure of 34%.
- Mains gas
- ≈33% (national 34%)
- Electricity
- ≈28% (national 26%)
- Solid fuel
- ≈3% (national 4%)
- LPG
- ≈1% (national 1%)
- Group or district heating
- ≈0% (national 2%)
- Has a heat pump
- ≈15% (national 15%)
Heat pumps installed with SEAI grant support in Waterford: 583 since 2015, 99 in 2026 up to 31 August 2026.
SEAI-registered air to water heat pump contractors based in Waterford: 16 (counted 9 October 2026). Many also work in neighbouring counties, so this isn't a measure of local capacity.
Waterford combines CSO's Waterford City and Waterford County rows. Figures marked ≈ are our dwelling-weighted approximation of CSO's rounded percentages.
Cite as: CSO, Domestic Building Energy Ratings Q2 2026 (HeatPumpInstallation.ie combination of city and county rows), via HeatPumpInstallation.ie
Home heating in Westmeath
Heating oil was the main space heating fuel in 51% of Westmeath's 24,893 BER-rated dwellings: 14th highest of the 26 counties, and 17 points above the national figure of 34%.
- Mains gas
- 12% (national 34%)
- Electricity
- 25% (national 26%)
- Solid fuel
- 9% (national 4%)
- LPG
- 3% (national 1%)
- Group or district heating
- 0% (national 2%)
- Has a heat pump
- 13% (national 15%)
Heat pumps installed with SEAI grant support in Westmeath: 272 since 2015, 56 in 2026 up to 31 August 2026.
SEAI-registered air to water heat pump contractors based in Westmeath: 16 (counted 9 October 2026). Many also work in neighbouring counties, so this isn't a measure of local capacity.
Cite as: CSO, Domestic Building Energy Ratings Q2 2026, via HeatPumpInstallation.ie
Home heating in Wexford
Heating oil was the main space heating fuel in 63% of Wexford's 45,112 BER-rated dwellings: 7th highest of the 26 counties, and 29 points above the national figure of 34%.
- Mains gas
- 1% (national 34%)
- Electricity
- 27% (national 26%)
- Solid fuel
- 7% (national 4%)
- LPG
- 2% (national 1%)
- Group or district heating
- 0% (national 2%)
- Has a heat pump
- 15% (national 15%)
Heat pumps installed with SEAI grant support in Wexford: 704 since 2015, 78 in 2026 up to 31 August 2026.
SEAI-registered air to water heat pump contractors based in Wexford: 32 (counted 9 October 2026). Many also work in neighbouring counties, so this isn't a measure of local capacity.
Cite as: CSO, Domestic Building Energy Ratings Q2 2026, via HeatPumpInstallation.ie
Home heating in Wicklow
Heating oil was the main space heating fuel in 33% of Wicklow's 42,664 BER-rated dwellings: joint 21st highest of the 26 counties, and 1 points below the national figure of 34%.
- Mains gas
- 34% (national 34%)
- Electricity
- 29% (national 26%)
- Solid fuel
- 3% (national 4%)
- LPG
- 1% (national 1%)
- Group or district heating
- 1% (national 2%)
- Has a heat pump
- 22% (national 15%)
Heat pumps installed with SEAI grant support in Wicklow: 469 since 2015, 86 in 2026 up to 31 August 2026.
SEAI-registered air to water heat pump contractors based in Wicklow: 21 (counted 9 October 2026). Many also work in neighbouring counties, so this isn't a measure of local capacity.
Cite as: CSO, Domestic Building Energy Ratings Q2 2026, via HeatPumpInstallation.ie
SEAI grants and registered contractors by county
These are separate SEAI datasets with their own dates. The first column counts heat pumps installed with support from SEAI's home retrofit grants (21,859 since 2015, 3,063 in 2026 up to 31 August 2026).2The last counts SEAI-registered air to water heat pump contractors by where they're based.3
| County | Grant-supported heat pumps since 2015 | In 2026 to 31 August 2026 | Registered contractors based there |
|---|---|---|---|
| Carlow | 231 | 19 | 5 |
| Cavan | 302 | 43 | 21 |
| Clare | 461 | 72 | 23 |
| Cork | 2,776 | 364 | 54 |
| Donegal | 1,369 | 242 | 39 |
| Dublin | 4,669 | 807 | 101 |
| Galway | 1,340 | 163 | 49 |
| Kerry | 1,146 | 115 | 47 |
| Kildare | 687 | 104 | 31 |
| Kilkenny | 378 | 42 | 12 |
| Laois | 472 | 91 | 13 |
| Leitrim | 142 | 13 | 5 |
| Limerick | 1,083 | 98 | 21 |
| Longford | 163 | 12 | 8 |
| Louth | 451 | 63 | 18 |
| Mayo | 911 | 151 | 35 |
| Meath | 515 | 83 | 34 |
| Monaghan | 168 | 24 | 19 |
| Offaly | 455 | 42 | 19 |
| Roscommon | 375 | 48 | 13 |
| Sligo | 561 | 54 | 18 |
| Tipperary | 1,176 | 94 | 21 |
| Waterford | 583 | 99 | 16 |
| Westmeath | 272 | 56 | 16 |
| Wexford | 704 | 78 | 32 |
| Wicklow | 469 | 86 | 21 |
Carlow
- Grant-supported heat pumps since 2015
- 231
- In 2026 to 31 August 2026
- 19
- Registered contractors based there
- 5
Cavan
- Grant-supported heat pumps since 2015
- 302
- In 2026 to 31 August 2026
- 43
- Registered contractors based there
- 21
Clare
- Grant-supported heat pumps since 2015
- 461
- In 2026 to 31 August 2026
- 72
- Registered contractors based there
- 23
Cork
- Grant-supported heat pumps since 2015
- 2,776
- In 2026 to 31 August 2026
- 364
- Registered contractors based there
- 54
Donegal
- Grant-supported heat pumps since 2015
- 1,369
- In 2026 to 31 August 2026
- 242
- Registered contractors based there
- 39
Dublin
- Grant-supported heat pumps since 2015
- 4,669
- In 2026 to 31 August 2026
- 807
- Registered contractors based there
- 101
Galway
- Grant-supported heat pumps since 2015
- 1,340
- In 2026 to 31 August 2026
- 163
- Registered contractors based there
- 49
Kerry
- Grant-supported heat pumps since 2015
- 1,146
- In 2026 to 31 August 2026
- 115
- Registered contractors based there
- 47
Kildare
- Grant-supported heat pumps since 2015
- 687
- In 2026 to 31 August 2026
- 104
- Registered contractors based there
- 31
Kilkenny
- Grant-supported heat pumps since 2015
- 378
- In 2026 to 31 August 2026
- 42
- Registered contractors based there
- 12
Laois
- Grant-supported heat pumps since 2015
- 472
- In 2026 to 31 August 2026
- 91
- Registered contractors based there
- 13
Leitrim
- Grant-supported heat pumps since 2015
- 142
- In 2026 to 31 August 2026
- 13
- Registered contractors based there
- 5
Limerick
- Grant-supported heat pumps since 2015
- 1,083
- In 2026 to 31 August 2026
- 98
- Registered contractors based there
- 21
Longford
- Grant-supported heat pumps since 2015
- 163
- In 2026 to 31 August 2026
- 12
- Registered contractors based there
- 8
Louth
- Grant-supported heat pumps since 2015
- 451
- In 2026 to 31 August 2026
- 63
- Registered contractors based there
- 18
Mayo
- Grant-supported heat pumps since 2015
- 911
- In 2026 to 31 August 2026
- 151
- Registered contractors based there
- 35
Meath
- Grant-supported heat pumps since 2015
- 515
- In 2026 to 31 August 2026
- 83
- Registered contractors based there
- 34
Monaghan
- Grant-supported heat pumps since 2015
- 168
- In 2026 to 31 August 2026
- 24
- Registered contractors based there
- 19
Offaly
- Grant-supported heat pumps since 2015
- 455
- In 2026 to 31 August 2026
- 42
- Registered contractors based there
- 19
Roscommon
- Grant-supported heat pumps since 2015
- 375
- In 2026 to 31 August 2026
- 48
- Registered contractors based there
- 13
Sligo
- Grant-supported heat pumps since 2015
- 561
- In 2026 to 31 August 2026
- 54
- Registered contractors based there
- 18
Tipperary
- Grant-supported heat pumps since 2015
- 1,176
- In 2026 to 31 August 2026
- 94
- Registered contractors based there
- 21
Waterford
- Grant-supported heat pumps since 2015
- 583
- In 2026 to 31 August 2026
- 99
- Registered contractors based there
- 16
Westmeath
- Grant-supported heat pumps since 2015
- 272
- In 2026 to 31 August 2026
- 56
- Registered contractors based there
- 16
Wexford
- Grant-supported heat pumps since 2015
- 704
- In 2026 to 31 August 2026
- 78
- Registered contractors based there
- 32
Wicklow
- Grant-supported heat pumps since 2015
- 469
- In 2026 to 31 August 2026
- 86
- Registered contractors based there
- 21
The honest bit
A contractor count isn't a measure of installer capacity or waiting times: many contractors work across several counties, and a register entry says nothing about how many jobs a firm takes on. Grant counts include only SEAI-funded jobs, not heat pumps in new homes or installed without a grant.
Download the data
Direct downloads, no sign-up. The CSVs match the tables on this page exactly.
- 26 counties: heating fuel and heat pumpsAll fuel shares, heat pump share, dwelling counts, ranks and which counties are combined.Download 26 counties: heating fuel and heat pumps (CSV)
- CSO Table 8: the original 31 geographiesExactly as CSO publishes them, so you can check our county totals.Download CSO Table 8: the original 31 geographies (CSV)
- SEAI grants and contractors by countyGrant-supported heat pumps and registered contractors, with their own dates.Download SEAI grants and contractors by county (CSV)
- Data dictionaryWhat every column means, with units.Download Data dictionary (CSV)
- Chart: oil heating by countyAll 26 counties, with source and period in the image. 2400 px wide.Download Chart: oil heating by county (PNG)
- Chart: oil heating by countyThe same chart as a scalable vector file.Download Chart: oil heating by county (SVG)
How to cite these figures
The underlying statistics are the CSO's, reused under its Creative Commons Attribution 4.0 licence;4 please credit the CSO. Our county combinations, tables and charts are free to reuse under the same licence with a credit to HeatPumpInstallation.ie. A link is welcome but not required.
Source: CSO, Domestic Building Energy Ratings Q2 2026, via HeatPumpInstallation.ie (heatpumpinstallation.ie/research/heat-pump-statistics-by-county/)
Journalists can find key findings, charts and contact details in our media centre, and every figure's source in the research hub. For your own home's figures, try the heat pump cost calculator.