ONG Heating and Plumbing Ltd SEAI Registered Heat Pump Installer in Mayo
Contact: Seamus O'Neill
Grant figures confirmed against SEAI
SEAI-registered ONG Heating and Plumbing Ltd Serving Mayo and Surrounding Areas
ONG Heating and Plumbing Ltd is an SEAI-registered heat pump installer based in Mayo, covering Castlebar, Ballina and homeowners across the county. Registered with SEAI for heat pump installation and solar thermal, they can carry out grant-eligible work and process your SEAI grant application directly, so you deal with the installer rather than a middleman.
Based in Mayo, ONG Heating and Plumbing Ltd serves homeowners across the county including Castlebar, Westport, Ballina, Claremorris, Knock, Belmullet, Crossmolina and Swinford. Whether you are in Castlebar, Ballina or anywhere across Mayo, get in touch to discuss your renewable heating project.
Renewable heating upgrades supported by the SEAI grant scheme are open to homeowners right across Mayo, whether you are replacing an ageing oil or gas boiler, adding solar, or planning a full home energy upgrade.
Send ONG Heating and Plumbing Ltd an enquiry
Describe your job once. It goes straight to ONG Heating and Plumbing Ltd, an SEAI-registered installer in Mayo — no lead-selling, no middleman.
ONG Heating and Plumbing Ltd, Common Questions
Is ONG Heating and Plumbing Ltd SEAI-registered?
Yes. ONG Heating and Plumbing Ltd appears on the official SEAI registered contractor database for heat pump installation in Mayo, which is what allows them to carry out grant-eligible installations and process your SEAI grant application.
How do I get a quote from ONG Heating and Plumbing Ltd?
Contact ONG Heating and Plumbing Ltd directly using the phone number on this page. Nothing goes through us, there is no booking fee, and your details are not passed to anyone else or sold on.
What areas does ONG Heating and Plumbing Ltd cover?
ONG Heating and Plumbing Ltd is based in Mayo and takes work across the county, including Castlebar, Westport, Ballina, Claremorris, Knock, Belmullet, Crossmolina and Swinford. Most installers cover their whole county rather than one town, so it is worth confirming your own address when you call.
What can ONG Heating and Plumbing Ltd install?
They are registered with SEAI for heat pump installation and solar thermal. A contractor registered for more than one measure can fit them together and claim both grants, which saves coordinating two jobs.
Should anything be done before the installation?
Insulation comes first on any home energy upgrade. A well-sealed house needs a smaller system and runs at a lower cost, and attic and wall insulation carry SEAI grants of their own. Ask about the fabric of the house when you speak to ONG Heating and Plumbing Ltd.
What grant can I claim on work by ONG Heating and Plumbing Ltd?
Because they are on the SEAI register, work carried out by ONG Heating and Plumbing Ltd is grant-eligible. SEAI pays up to €12,500 for the full heat pump package as of July 2026. The installer applies on your behalf and you pay the balance after the grant is deducted.
The Other Trades a Mayo Retrofit Needs
A renewable heating upgrade rarely happens on its own, and the order the work goes in decides what it costs. These are SEAI-registered trades covering Mayo on our sister sites, each one worth lining up before the heating work starts rather than after.
- Before the heating work Attic and wall insulation in Mayo Insulate before you heat. A well-sealed home needs a smaller heat pump and costs less to run, and insulation carries SEAI grants of its own.
- Alongside the installation Plumbers and gas installers in Mayo Taking out an old oil or gas boiler, reworking the heating circuit and fitting the hot water cylinder is a registered plumber’s job, and a heat pump needs an RGI plumber to commission it.
This Installer Can Process Your SEAI Grant
ONG Heating and Plumbing Ltd is registered with SEAI, which means they can manage your grant application as part of the installation process. The SEAI heat pump grant covers up to €12,500 (as of July 2026) of the installation cost. You pay the net amount after the grant is deducted, and your installer handles the paperwork.