County Roscommon · Census 2022 and gas meter data
Combi boiler installation in Roscommon
Oil is the main fuel in Roscommon: 56% of homes. What that means for a new combi, what installers publish, and one installer who covers Roscommon.
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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 Roscommon a new combi is almost always an oil combi: 56% of homes heat with oil and only 92 homes had a gas meter in 2024 (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. The lowest starting price published by an installer based in Roscommon is €2,000 (VAT not stated).
Tell us about the job and one installer who covers your county rings you with a price. Nothing is booked until you say yes.
What's different about a combi in Roscommon?
Roscommon has more detached houses than any other county: 74% of homes, against 41% nationally (Census 2022). It also has almost no gas. The CSO counts 92 homes with a gas meter in the whole county in 2024, and those are in the western part of Athlone (CSO, Networked Gas Consumption 2024).
56% of homes heat with oil and 27% with coal, peat or wood, the second highest solid fuel share after Offaly. Roscommon town is 61% oil, Boyle 67% and Castlerea 58% (CSO, built-up areas file). A Roscommon combi is an oil combi, often outside, and in a big detached house with two bathrooms a standard oil boiler with a cylinder may suit better.
Roscommon in figures
Every figure for Roscommon, against Ireland
| Roscommon | Ireland | |
|---|---|---|
| Natural gas | 4% | 33% |
| Oil | 56% | 39% |
| Electricity | 6% | 12% |
| Coal, peat or wood | 27% | 9% |
| Homes with a gas meter, 2024 | 92 | 695,199 |
| Median gas use per metered home, 2024 | Not published | 7,771 kWh |
| Detached houses | 74% | 41% |
| Built before 1980 | 39% | 42% |
| Built 2001 to 2010 | 32% | 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 Roscommon town?
In Roscommon 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 |
|---|---|---|---|
| Roscommon | 2,346 | 4% | 61% |
| Boyle | 1,169 | 1% | 67% |
| Ballaghaderreen | 878 | 1% | 66% |
| Castlerea | 987 | 1% | 58% |
| Lanesborough-Ballyleague | 690 | 3% | 60% |
| Strokestown | 380 | 3% | 62% |
| Elphin | 301 | 0% | 62% |
| Termonbarry | 260 | 3% | 72% |
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 Roscommon?
- Oil combi. 56% of Roscommon 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. 32% of Roscommon 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. 74% of Roscommon 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 Roscommon?
Met Éireann's 1991 to 2020 averages give Roscommon about 2,088 heating degree days a year, about the same as 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). Size the boiler for the house and the bathrooms, not the county.
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 Roscommon?
The one installer based in Roscommon that publishes a price starts from €2,000. 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.
1 installer based in Roscommon publishes a price on its own website (checked 22 and 23 October 2026). Listing an installer here doesn't mean it's the installer we pass your request to.
| Installer | Lowest package | Lowest combi | Top of list | Packages | Warranties | VAT |
|---|---|---|---|---|---|---|
| DH Plumbing and Heating | from €2,000 | – | €6,000 | 2 | – | Not stated |
| 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 Roscommon do we cover?
All of County Roscommon, including Roscommon, Boyle, Ballaghaderreen, Castlerea, Strokestown and Elphin. The six biggest towns had 15,770 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 Galway · combi boilers in Mayo · combi boilers in Sligo · combi boilers in Westmeath · combi boilers in Offaly · every county.
FAQ
Questions people ask
How much is a combi boiler installed in Roscommon?
The one installer based in Roscommon that publishes a price starts from €2,000. 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 Roscommon?
Almost none. The CSO counts 92 homes in Roscommon with a gas meter in 2024, all in the western part of Athlone. 56% of Roscommon homes heat with oil, so a combi here is an oil combi or LPG.
Do most homes in Roscommon need an oil or a gas combi?
Oil, on the 2022 Census: 56% of Roscommon homes heat with oil and 4% 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.
Guides
Near Roscommon
- Combi boilers in Galway8% of homes on gas, 54% on oil.
- Combi boilers in Mayo3% of homes on gas, 61% on oil.
- Combi boilers in Sligo3% of homes on gas, 60% on oil.
- Combi boilers in Westmeath10% of homes on gas, 50% on oil.
- Combi boilers in Offaly7% of homes on gas, 42% on oil.
- Oil combi boilersMedian oil boiler €3,000.
- Combi boiler pricesMedian combi swap €2,600.
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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…
Sources (1)
Prices and facts on this page were checked against these published pages. We are not connected to these businesses.
- DH Plumbing and Heating: dhplumbingandheating.ie