County Down
- Boiler Service Annalong, County Down
- Boiler Service Banbridge, County Down
- Boiler Service Carryduff, County Down
- Boiler Service Castlewellan, County Down
- Boiler Service Downpatrick, County Down
- Boiler Service Kilkeel, County Down
- Boiler Service Newtownards, County Down
- Boiler Service Rostrevor, County Down
- Boiler Service Warrenpoint, County Down