County Sligo · Census 2022 and gas meter data
Combi boiler installation in Sligo
Oil is the main fuel in Sligo: 60% of homes. What that means for a new combi, what installers publish, and one installer who covers Sligo.
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Last checked 1 November 2026: SEAI grant position and fuel prices, CSO gas data. Installers' published prices read 22 and 23 October 2026.
In Sligo a new combi is almost always an oil combi: 60% of homes heat with oil and the county isn't connected to the gas network (CSO). Published oil boiler prices in Ireland run €2,500 to €3,600 supplied and fitted, median €3,000 across 6 installers, with oil combis at the top of that range.
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What's different about a combi in Sligo?
Sligo is not connected to the gas network. The CSO says so in its 2024 gas consumption release: Donegal, Leitrim and Sligo have no meter connections (CSO, Networked Gas Consumption 2024). 60% of Sligo homes heat with oil, 18% with coal, peat or wood and 11% with electricity (Census 2022). Sligo town is 55% oil, Strandhill 67% and Ballymote 71% (CSO, built-up areas file).
So a Sligo combi is an oil combi, or LPG from a bulk tank. The coast is milder than the midlands: Sligo town gets about 2,032 heating degree days a year on Met Éireann's 1991 to 2020 averages, a little under the Irish average of 2,079 (our calculation from the 1 km grid). 8% of households live in a flat or apartment. With no mains gas, an electric combi is the one option there that needs no oil or LPG tank.
Sligo in figures
Every figure for Sligo, against Ireland
| Sligo | Ireland | |
|---|---|---|
| Natural gas | 3% | 33% |
| Oil | 60% | 39% |
| Electricity | 11% | 12% |
| Coal, peat or wood | 18% | 9% |
| Homes with a gas meter, 2024 | None (no network) | 695,199 |
| Median gas use per metered home, 2024 | Not published | 7,771 kWh |
| Detached houses | 56% | 41% |
| Built before 1980 | 39% | 42% |
| Built 2001 to 2010 | 28% | 25% |
| Built since 2011 | 6% | 8% |
Sources: CSO Census 2022, Small Area Population Statistics, county file, tables 6.1, 6.2 and 6.5 (households; year built where stated), read 29 October 2026; CSO table F2007A for detached houses; CSO, Networked Gas Consumption 2024, tables 5B and 6B, from Gas Networks Ireland meter data, read 30 October 2026.
Is it gas or oil in your Sligo town?
In Sligo the towns are oil too, not just the countryside. These are the 8 biggest, with the share of households on each fuel in the 2022 Census.
| Town | Homes | Gas | Oil |
|---|---|---|---|
| Sligo | 8,208 | 4% | 55% |
| Tubbercurry | 905 | 7% | 62% |
| Strandhill | 733 | 7% | 67% |
| Collooney | 679 | 10% | 62% |
| Ballysadare | 715 | 16% | 65% |
| Ballymote | 729 | 1% | 71% |
| Enniscrone | 528 | 3% | 55% |
| Coolaney | 412 | 0% | 82% |
Source: CSO Census 2022, Small Area Population Statistics, built-up areas, table 6.5 (households by central heating), and CSO table F1015 (population of towns), read 30 October 2026. Shares are of all households, including those that didn't say.
What changes the job in Sligo?
- Oil combi. 60% of Sligo homes heat with oil. An oil combi or a standard oil boiler is fitted by an OFTEC-registered technician, often outdoors in its own casing. Median published oil boiler price €3,000. See oil combi boilers.
- Boom-years boilers. 28% of Sligo homes were built between 2001 and 2010. Their first boilers are now 15 to 25 years old, and a like-for-like swap is the usual job.
- Big detached houses. 56% of Sligo homes are detached, against 41% nationally. With two or more bathrooms in use at once, a combi shares one flow of hot water; a system boiler with a cylinder may suit better. See combis for large houses.
What does a combi cost to run in Sligo?
Met Éireann's 1991 to 2020 averages give Sligo about 2,032 heating degree days a year, 2% fewer than the Irish average of 2,079 (Met Éireann 30-year averages; degree days are our calculation from the 1 km grid, base 15.5 °C). The same house needs less heat here, so a combi sized for hot water usually has output to spare for the radiators.
Oil is priced the same everywhere: kerosene was 12.60c a kWh on SEAI's 1 July 2026 schedule prices, against 13.00c for gas. See combi running costs for the cost per shower and per year.
How much does a new combi cost in Sligo?
We found no Sligo installer that publishes a price. Nationally, a like-for-like gas combi swap has a median published price of €2,600 across 12 installers, a conversion €3,400 and an oil boiler €3,000.
We found no installer based in Sligo that publishes a supplied-and-fitted price on its own website (checked 22 and 23 October 2026). The national figures are the benchmark: 35 installers' published prices, every one linked on the price page.
| Job | Median published price | Middle half | Installers |
|---|---|---|---|
| Combi boiler swap | €2,600 | €2,199–€2,800 | 12 |
| Conversion to a combi | €3,400 | €3,100–€4,000 | 3 |
| System or regular boiler | €2,500 | €2,199–€2,650 | 32 |
| Oil boiler | €3,000 | €2,590–€3,500 | 6 |
Most prices don't say whether VAT is included. Ask for a written price with VAT, the flue, the flush, the filter and the certificate.
Which parts of Sligo do we cover?
All of County Sligo, including Sligo, Tubbercurry, Strandhill, Collooney, Ballysadare and Ballymote. The six biggest towns had 30,152 people between them in 2022 (CSO Census 2022, table F1015). Put your town or Eircode in the form and we pass it to one installer who covers your county.
Nearby: combi boilers in Mayo · combi boilers in Roscommon · every county.
FAQ
Questions people ask
How much is a combi boiler installed in Sligo?
We found no Sligo installer that publishes a price. Nationally, a like-for-like gas combi swap has a median published price of €2,600 across 12 installers, a conversion €3,400 and an oil boiler €3,000.
Is there mains gas in Sligo?
No. Sligo is one of three counties, with Donegal and Leitrim, that aren't connected to the gas network (CSO, Networked Gas Consumption 2024). 60% of Sligo homes heat with oil, so a combi here means an oil combi or LPG.
Do most homes in Sligo need an oil or a gas combi?
Oil, on the 2022 Census: 60% of Sligo homes heat with oil and 3% with gas. A meter box on an outside wall means gas; a tank in the garden means oil.
Is there a grant for a new combi boiler?
No. In SEAI's own words: "We do not give grants for new or replacement fossil fuel boilers, such as gas or oil" (SEAI, read 1 November 2026). You may get the €700 heating controls grant if your home was built and occupied before 2011 (SEAI), and with a combi SEAI requires an extra heating zone as part of that work. The €2,000 boiler scrappage grant only applies when a heat pump replaces the boiler.
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Where these numbers come from (8 public sources, checked 29 October 2026)
- CSO: cso.ie/en/releasesandpublications/ep/p-ngc/networked…
- CSO, built-up areas file: cso.ie/en/media/csoie/census/census2022/SAPS_2022_BU…
- CSO Census 2022, Small Area Population Statistics: cso.ie/en/census/census2022/census2022smallareapopul…
- CSO table F2007A: data.cso.ie/table/F2007A
- CSO table F1015: data.cso.ie/table/F1015
- Met Éireann 30-year averages: met.ie/climate/30-year-averages
- SEAI: seai.ie/grants/home-energy-grants/individual-grants/s…
- SEAI: seai.ie/grants/home-energy-grants/individual-grants/h…