Oil to Gas Boiler Conversion in Dublin: Process, GNI Connection & 2026 Costs

1. Why Dublin Homeowners Switch from Oil to Natural Gas

Across older suburbs in Dublin, Kildare, Meath, and Wicklow, thousands of homes still rely on external kerosene oil tanks and aging cast-iron oil burners. While oil served homes well for decades, bulky 1,000-liter plastic garden tanks take up valuable patio space, require €800–€1,200 bulk upfront refills, and leave you without heat if the tank runs dry on a bank holiday weekend.

Switching to a modern wall-hung Worcester Bosch or Viessmann condensing natural gas boiler gives you continuous, on-demand fuel from the street main, whisper-quiet indoor operation, and the option to convert to a Combi boiler—eliminating your hot press cylinder and attic tank completely.

2. The 4-Step Oil-to-Gas Conversion Process

• Step 1: Gas Networks Ireland (GNI) Meter Connection: First, we check that a natural gas main runs along your road. You request a new domestic gas connection from Gas Networks Ireland, who lay the supply pipe from the footpath to a white external meter box mounted on the front or side wall of your house.

• Step 2: Free On-Site RGI Survey: Our Senior RGI Engineer surveys the cleanest route to run the new copper gas supply pipe from your external meter box to the boiler location, checks your radiator sizing, and gives you a fixed written quote.

• Step 3: Safe Decommissioning of Oil Boiler & Tank: We pump out any remaining kerosene, safely disconnect and remove your old oil burner, fire valve, and garden bunded tank, and perform a full chemical power flush of your existing radiators.

• Step 4: Gas Boiler Commissioning & RGII Certification: We install your new A-rated gas boiler, magnetic filter, and smart controls, pressure-test the new gas line, issue your RGII Declaration of Conformance (which triggers GNI to lock in the live gas meter), and register your 10-year warranty.