Family-owned, built in Birr, Co. Offaly
Grant installer
in Belfast.
Grant is the most-fitted oil boiler brand across the island of Ireland, and the dominant choice in rural Northern Ireland. Irish-owned, Irish-engineered, and built for our climate and our fuel.
Family-owned, built in Birr, Co. Offaly
Grant
About Grant
Who installers fit Grant for.
Grant is our default oil recommendation alongside Warmflow. The Vortex range is everywhere across rural NI: the BT28 Drumbeg fringe, the BT34 hinterland around Newry, the BT70 countryside east of Dungannon. Parts are stocked locally, NI service engineers know the product inside out, and the condensing efficiency stacks up against any imported brand. Where we'd lean Warmflow over Grant is on locally-built provenance. Where we'd lean Grant over Warmflow is on the Vortex's combustion track record across a decade of NI installs.
5-year standard manufacturer warranty, extending to 10 years on installs registered through Grant's G1 installer scheme. Warranty requires annual OFTEC servicing to remain valid, which we'd recommend on any oil boiler regardless.
Range
Grant models installers fit.
5 ranges covering combi, system and regular setups.
- Vortex Pro internal oil · 15-26kW / 26-36kW
- The mainstream Grant. Internal install in a utility or kitchen. Condensing, well-priced, easy to service.
- Vortex Pro external oil · 15-26kW / 26-36kW
- Same boiler in a weather-rated case for external installation. Common in rural NI where indoor utility space is tight.
- Vortex Eco oil · 21-26kW / 26-36kW
- Higher-efficiency Vortex with low-NOx burner. Worth the upgrade where annual oil consumption is high.
- Vortex Boilerhouse oil · 15-26kW / 26-36kW
- Pre-plumbed cabinet for garage or outbuilding installs.
- Vortex Combi oil · 21-26kW
- Oil combi for properties without a cylinder. Less common in NI than gas combis but a genuine option.
Pricing
Indicative prices.
Every install is quoted after a home survey. Prices shown include labour, materials and Building Control notification.
- Vortex Pro internal, like-for-like swap
- from £2,250 fitted
- Vortex Pro external, replacing existing external
- from £2,450 fitted
- Vortex Eco upgrade with system flush
- from £2,750 fitted
- Vortex Boilerhouse, full install
- from £3,150 fitted
All prices include VAT. Manufacturer warranty included as per brand terms.
Why fit Grant
When we recommend it.
- 01 Most-installed oil boiler family across Ireland. Every OFTEC engineer knows it cold.
- 02 Excellent parts availability through trade merchants across NI.
- 03 Strong condensing efficiency, lower running costs than older Vortex generations.
- 04 10-year warranty available through G1 installer registration.
The honest counter-view
When we'd suggest something else.
- 01 Strict preference for NI-made? Warmflow is built 30 miles away in Craigavon.
- 02 Premium oil with the quietest operation in class? Firebird Enviromax HE or Worcester Heatslave II.
- 03 Switching from oil to gas this year? Don't fit another oil boiler, look at the oil-to-gas conversion service.
Get in touch
Thinking of a Grant?
Send your property details and current heating setup. We'll come back with a survey slot. Or send an emergency request.