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 a heat pump installer based in Mayo, covering Castlebar, Ballina and homeowners across the county. ONG Heating and Plumbing Ltd is listed on the SEAI register for heat pump installation and solar thermal (checked July 2026), and you contact the installer directly. Confirm current registration with SEAI before you book.
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?
ONG Heating and Plumbing Ltd is listed on the SEAI register for heat pump installation in Mayo (checked July 2026). Registration can change, so confirm it on the SEAI registered contractor search (https://hes.seai.ie/GrantProcess/ContractorSearch.aspx) before you book.
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?
Grants may be available for eligible homes. SEAI lists support of up to €12,500 for the full heat pump package as of July 2026, and SEAI decides eligibility. Confirm how the application and payment work with ONG Heating and Plumbing Ltd and with SEAI before any work starts.
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.
- 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 usually done by a registered plumber, and a heat pump is usually commissioned by a qualified, registered professional.
- Alongside the installation Electricians in Mayo A heat pump needs its own supply and isolator, and solar panels need the inverter tied into the consumer unit and the ESB notification handled. Both are electrician work.
SEAI Heat Pump Grant for Work by ONG Heating and Plumbing Ltd
SEAI support for a heat pump is up to €12,500 (as of July 2026) for eligible homes. Ask ONG Heating and Plumbing Ltd how the grant application and payment would work for your job, and confirm the details with SEAI before any work starts.
It is worth knowing how the total breaks down before the survey. The heat pump itself carries €6,500, a Renewable Heat Bonus applies where you are replacing an oil, gas, solid fuel or electric storage system, and a further amount goes towards heating system upgrades such as new radiators. Asking for the quote to set those out separately makes the net figure clear rather than leaving it to be worked out later.