This is part of the paid GridteamAI Quarterly Sector Report.
£295 single volume · £995/yr annual · Team £2,495 · Enterprise £4,995 · Corporate £9,995. Secure checkout coming soon; email to purchase today.
2.7 TWh promised, under 1% delivered — the widest gap in Ireland’s energy transition.
Heat is the part of Ireland’s climate problem that has barely moved. More than 90% of the country’s heat comes from fossil fuels, and the two tools meant to change that — district heating and heat pumps — are both running years behind the targets set for them.
Six observations stand out: under 1% district heating — among the lowest in the EU, against a potential of over half of national heat demand; 2.7 TWh promised by 2030, the 2025 milestone already missed; the enabling law still isn’t law (a General Scheme since October 2024, the Bill expected end-2026); Tallaght works; Poolbeg is switched off — the flagship has its equipment installed and idle; heat pumps are at 3.5% of target (~14,000 of 400,000); and 90% of heat is still fossil, with no carbon-capture framework for the industry that cannot electrify.
The consequence: heat is the sector where Ireland’s climate ambition and its delivery are furthest apart — a quarter of national emissions, moving slowest, with the delivery machinery still being assembled.
Heat is where Ireland’s climate ambition meets its hardest reality. The country has the evidence (over half its heat could be district-heated), the targets (2.7 TWh by 2030), the waste heat (from data centres and energy-from-waste) and the proven technology. What it does not have is any of the delivery machinery at scale — the law, the sustained funding, the networks, the installer capacity — and building that machinery from almost nothing is a generational task, not a six-year one.
Heat is where the series’ threads meet: the data-centre waste heat of IE002 is the anchor source the Tallaght model turns into an asset; the gas of IE005 is what 40% of Irish heat still burns; and the compressed catch-up of IE008’s water sector is the same pattern — an industry its peers built over fifty years, attempted in a decade. Hard-to-abate industry, meanwhile, has no legal carbon-capture route at all.
The shape of this volume. § 1 sets out the headline figures. § 2 develops twelve findings, each confidence-annotated. A chapter-weight pull at p. 14 anchors the argument. § 3 decodes the ambition and the machinery — the Heat Study, the target, the Bill and the fund. § 4 sets out the pipeline and the projects. § 5 decodes heat pumps, retrofit and the CCUS gap. § 6 sets out recommendations, with a one-page tear-out at p. 25.
The National Heat Study (2022) found district heating could meet up to 54% of national heat demand; the Climate Action Plan set a 2.7 TWh target for 2030 with a 0.8 TWh milestone for 2025. Delivery stands at under 1% of heat demand, and the 2025 milestone has effectively been missed.
The dashed frame is the evidenced potential; the umber sliver is delivery. Potential is not pipes — the distance between the two is this report’s subject.
HIGH — anchored to a named Irish primary source (SEAI, gov.ie, Codema, the EIB). MEDIUM — direction of travel confirmed but a material figure is unpublished or contested. Every forward position is labelled as a projection.
Findings 01 – 12 · summary
Findings 01 – 09 follow in detail · pp. 11 – 13 · 10 – 12 carried on the § 6 matrix
District heating meets under 1% of Ireland’s heat demand, one of the smallest shares in the European Union (SEAI). Across most of northern Europe — Denmark, Sweden, the Baltics, parts of Germany — heat networks are ordinary infrastructure, carrying half or more of a city’s heat from waste-to-energy plants, industrial waste heat or geothermal sources. In Ireland they are almost absent. That is the baseline every target has to climb from, and it is what makes the 2.7 TWh-by-2030 ambition so steep: the country is not scaling an existing industry, it is trying to create one from almost nothing in six years. The National Heat Study found the potential is vast — up to 54% of national heat demand — but potential is not pipes, and the distance between the two is the subject of this report.
The Climate Action Plan targets up to 2.7 TWh of district heating by 2030 and up to 0.8 TWh by 2025. With the first scheme of scale only opening in 2023 and the rest still pre-construction, the 0.8 TWh milestone has effectively been missed — no official figure confirms the 2025 outturn, but with district heating under 1% of demand the shortfall is not in doubt. Missing the first milestone by a wide margin, with the enabling law still a draft, makes the 2030 target a very long reach. This matters beyond heat: district heating is one of the cheapest ways to decarbonise dense urban heat demand, and every year of delay locks in more oil and gas boilers that will still be running in 2030 and beyond. The target is legally framed; the delivery is a rounding error against it.
The Heat (Networks and Miscellaneous Provisions) Bill reached General Scheme stage in October 2024, with the full Bill expected around end-2026. Until it passes, there is no licensing regime, no economic regulator for heat networks — the role is to sit with the CRU — and no statutory Heat Networks Authority beyond SEAI’s interim role. The market is being asked to build to a framework that has not been legislated, which is a real deterrent to private investment: a developer or a local authority contemplating a multi-decade, capital-intensive heat network needs the regulatory certainty of a licensing regime and consumer-protection rules, and Ireland does not yet have them. The absence of the law is not the only reason the sector is stalled, but it is a foundational one, and until the Bill is enacted the pipeline will stay dominated by feasibility studies rather than construction.