Servicing · checked 1 November 2026
How often should a boiler be serviced?
Once a year, gas or oil, and most gas services take 45 to 60 minutes. Here's who says so, what the law asks, and the maintenance you can do between services.
- Free quote, no obligation
- One engineer rings you, not a list
- Gas or oil, anywhere in Dublin
- 24Dublin service prices re-read 1 November 2026
- €110–€135what most Dublin engineers charge for a gas service
- 45–60 mina typical gas service, says Bord Gáis Energy
- RGI onlywho may service a gas boiler, by law (CRU)
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Last checked 1 November 2026. Read today on rgi.ie, Gas Networks Ireland, OFTEC, Bord Gáis Energy, Energia and Vaillant.
Once a year, gas or oil. Safe Energy Ireland, which runs the gas register, says a gas boiler "needs to be serviced once a year, as recommended by the manufacturers" (rgi.ie), and OFTEC says at least once a year for oil (OFTEC).
Most gas boiler services take around 45 to 60 minutes, Bord Gáis Energy says, depending on the type and condition of the boiler; Energia says about 45 minutes.
How often should a gas boiler be serviced?
Once a year. Gas Networks Ireland: "You should have your boiler and other natural gas appliances serviced by a Registered Gas Installer once a year" (gasnetworks.ie). Safe Energy Ireland gives the reason: a serviced boiler burns the gas correctly, "reducing the risk of emmissions of poisonous Carbon Monoxide" (rgi.ie, quoted as written). Most makers' warranties ask for the same.
How often should an oil boiler be serviced?
At least once a year, by an OFTEC-registered technician (OFTEC). Oil burners also need a new nozzle and a filter on a service. See oil boiler service and oil boilers in Dublin.
How long does a boiler service take?
Around 45 to 60 minutes for most gas boilers (Bord Gáis Energy); Energia says about 45 minutes for its service (Energia). Bord Gáis Energy's price covers the first 45 minutes, then €25 per 15 minutes (Bord Gáis Energy), which tells you an older or awkward boiler can run over. Ask any engineer what their price covers.
Is a yearly boiler service the law?
For your own home, no law sets how often. What the law does say is who can do it: only a Registered Gas Installer can work on a gas boiler (CRU). For a rented home, the landlord must keep the gas installation in good repair and safe working order (S.I. No. 137 of 2019); see landlord gas safety certificates.
Boiler maintenance between services
Four things you can do yourself, from the makers' and Bord Gáis Energy's own advice:
- Check the pressure gauge: 1 to 1.5 bar with the heating off, under 2.5 bar with it on (Vaillant). Top up with the filling loop if it's under 1 bar, and close the loop fully after (Bord Gáis Energy).
- Bleed radiators that are cold at the top. Vaillant suggests once each season (Vaillant).
- In a frost, thaw a frozen condensate pipe with warm water, not boiling, then reset the boiler (Bord Gáis Energy).
- Test the carbon monoxide alarm, and keep the boiler's vents and flue clear.
When to call before the service is due
Don't wait for the yearly service if you smell gas, see soot around the boiler, notice a yellow or flickering flame, the boiler keeps failing or resetting, or there's a visible leak (Bord Gáis Energy). If you smell gas, leave the house and ring Gas Networks Ireland on 1800 20 50 50 from outside (Gas Networks Ireland). For anything else, see boiler repair.
Book the next one
Keep last year's service record: the date on it is when the next one is due. Tell us about the boiler in the form and one boiler engineer who covers your part of Dublin rings you with a price. Most Dublin engineers charge €110–€135 for a gas service.
The law
Only an RGI works on gas
By law, only a Registered Gas Installer (RGI) can work on a gas boiler in your home (CRU). The register is run by Safe Energy Ireland for the CRU. Ask to see the engineer's RGI ID card, or check their name on rgi.ie.
- Gas boiler: only an RGI
- Oil boiler: ask for OFTEC
- A written record after every service
- Smell gas? 1800 20 50 50, from outside
FAQ
Questions people ask
How often should a boiler be serviced in Ireland?
Once a year. Safe Energy Ireland and Gas Networks Ireland say once a year for gas; OFTEC says at least once a year for oil.
How long does a boiler service take?
Most gas boiler services take around 45 to 60 minutes, Bord Gáis Energy says, depending on the type and condition of the boiler; Energia says about 45 minutes.
Is it a legal requirement to service my boiler every year?
Not for your own home. The law says only a Registered Gas Installer can work on a gas boiler. A landlord must keep the gas installation in safe working order.
What can I do to maintain my boiler between services?
Keep the pressure between 1 and 1.5 bar with the heating off, bleed radiators that are cold at the top, thaw a frozen condensate pipe with warm water, and test the carbon monoxide alarm.
How much is a boiler service in Dublin?
Most Dublin engineers charge €110–€135 for a gas boiler service. Across 24 published prices the range is €80 to €199, and the most common price is €120.
When should I call an engineer before the service is due?
If you smell gas, see soot, notice a yellow or flickering flame, the boiler keeps failing or resetting, or there's a leak. If you smell gas, leave the house and ring 1800 20 50 50 from outside.
Free quote
Get a service price in 4 quick taps
Tell us about the boiler. It goes to one boiler engineer who covers your part of Dublin, and they ring you with a price.
Before you send it
Price, time and who rings
What will it cost?
Most Dublin engineers charge €110–€135 for a gas boiler service, and published oil service prices run €80 to €220 (re-read 1 November 2026). The engineer gives you a price on the phone, before anything is booked.
Is VAT in the price?
Often the price doesn't say. Only 3 of the businesses we checked state it, so ask for the price with VAT.
How long does the service take?
Most gas boiler services take around 45 to 60 minutes, Bord Gáis Energy says. An older boiler, or one in a tight hot press, can take longer.
Does sending this commit me to anything?
No. It's free, and nothing is booked until you agree a price and a time with the engineer.
Will lots of firms ring me?
No. Your details go to one boiler engineer who covers your part of Dublin, not to a list.
What if nobody rings?
Email hello@boilerservicedublin.ie with your area and we'll follow it up.
Is the engineer registered?
By law only a Registered Gas Installer can service a gas boiler. Ask for their RGI number and check it on rgi.ie: how to check. Oil boilers are OFTEC work.
Where these numbers come from (7 public sources, checked 1 November 2026)
- rgi.ie/safety/service-your-boiler
- OFTEC: oftec.org/news-blog/2021/07/21/oil-heated-households-re…
- gasnetworks.ie/gas-safety/rgi
- CRU: cru.ie/consumer-information/home-safety/gas-works
- S.I. No. 137 of 2019: irishstatutebook.ie/eli/2019/si/137/made/en/print
- Gas Networks Ireland: rgi.ie/wp-content/uploads/2021/05/GNI-Gas-Safety-Lea…
- rgi.ie/registered-installers
Sources (5)
Prices and facts on this page were checked against these published pages. We are not connected to these businesses.
- Bord Gáis Energy: bordgaisenergy.ie
- Energia: smarthomestore.energia.ie
- Bord Gáis Energy: bordgaisenergy.ie
- Vaillant: vaillant.com
- Bord Gáis Energy: bordgaisenergy.ie