Chapelizod (worked example)Published
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Chapelizod (worked example) Energy Master Plan

Where we are now

Illustrative worked example · 21 September 2026
Energy we use
48.44GWh of primary energy a year
Across 1,259 homes, 46 premises and resident travel
Carbon we release
9,048tonnes a year
Energy-related CO₂ for the included sectors
What it costs us
€6.84Ma year
€3.45M is the modelled direct fossil-fuel cost
  • 1,259 homes
  • 717 with a BER (57%)
  • 1,043 households
  • 2,424 residents
  • 981 cars
  • 46 business premises
  • 10 public & community buildings

Estimated annual energy, emissions and cost for the sectors in this plan. Based on 11 Small Areas in Chapelizod, Co. Dublin

Source (SEAI BER profile + Census ’22) +

BER counts, ratings and heating fuel from SEAI’s BER profile by Small Area, February 2025 edition (717 of 1,259 homes rated); dwelling detail from a sample of SEAI BER Register records; CSO Census 2022 SAPS for household counts and heating fuel, Tailte Éireann valuation floor areas for business, and SEAI emission factors and unit prices.

Where the community is

Indicative locations from OpenStreetMap and Overture Maps; premises counts come from Tailte Éireann.
The 11 Small Areas that make up Chapelizod (worked example), Co. Dublin, with the businesses and community buildings in them. Switch a layer off with its button.
Which parts of the community use what

Energy by sector

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Residential uses the most, 57% of the community’s primary energy. Agriculture is not counted in this plan. Primary energy includes what is lost producing and delivering fuel and electricity, so it is higher than meters and fuel deliveries record.
Primary energy, CO₂ and spend by sector, a year
Residential27.84,654€4,027,379
Transport9.52,205€1,386,701
Business7.71,528€989,006
Community3.4662€437,266
Total48.49,048€6,840,353
Source (EMP baseline + SEAI factors) +
The plan’s combined baseline: each sector’s primary energy, CO₂ and spend from its chapter, converted with SEAI primary energy and emission factors.

What kind of energy the community buys

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Fossil fuel is the largest share, at 62% of primary energy. Fossil fuel covers heating oil, gas, solid fuel, petrol and diesel. Renewable covers the renewable share of grid electricity and wood or other biomass; electricity is the rest of the grid electricity used.
  • Electricity
    21%
    10.2 GWh
  • Fossil fuel
    62%
    29.9 GWh
  • Renewable
    17%
    8.4 GWh
€5.31M a year pays for fossil fuel and non-renewable grid electricity, energy produced outside the community. Using less, and generating more locally, reduces that outflow.
Source (EMP tables T1–T3) +
The combined baseline’s electricity, fossil fuel and renewable rows (EMP tables T1 to T3), summed across sectors. Spend is at the plan’s fuel prices.
Projects in the plan

The 23 projects in the plan’s Register of Opportunities, by area. Each opens its page on eTownz, where the SEC runs it.

Residential 3

Business 4

Public & community 2

Transport 6

Farming 1

Renewables 5

Across the community 2

Published Illustrative worked example · 21 September 2026. Figures are estimates built from SEAI, CSO and Tailte Éireann data.
About this plan +

A summary of Chapelizod (worked example)’s Energy Master Plan: how much energy the community uses today, what that costs, what the plan would change by 2030, and each chapter of the plan in brief. The full plan document has the detail behind every figure.

Where all of this comes from +
  • SEAI BER Ratings by Small Area — homes with a BER, ratings, heating fuel and GeoDirectory residences — published 7 February 2025, retrieved 21 Sept 2026, 20:56
  • SEAI BER Register — fabric, floor areas and energy detail for a sample of rated homes — assessment dates vary by record
  • CSO Census 2022 Small Area Population Statistics — households, heating fuel, car ownership — 2022
  • Pobal HP Deprivation Index — relative affluence by Small Area — 2022
  • Tailte Éireann valuation records — rateable floor areas by category — 2025
  • EU JRC PVGIS — solar yield — v5.3
  • ESB Networks customer capacity heatmap — spare capacity at local substations — retrieved 2026-04-17
  • SEAI SEC Energy Master Plan grant data — grants paid in Chapelizod Tidy Towns SEC — running totals, retrieved 2026-09-21
  • Energy factors and indicative tariffs — values saved in plan assumptions — mixed source periods; see assumptions
Things to be careful about +
  • Space and water heating, lighting and pumps/fans come from standardised BER certificate calculations, not measured bills. Certificates tend to overstate heating use in poorly rated homes.
  • Appliances and cooking add 2,900 kWh of electricity a year per occupied home (SEAI Energy in the Residential Sector 2018, 2016 national average, less certificate lighting). This is an editable assumption.
  • Uniform expansion from valid records to residential addresses assumes the same mean use in unrated homes. It does not correct BER selection bias or differing source vintages.
  • Existing on-site generation is not deducted without evidence of self-consumption. Additional PV is assessed separately against remaining electricity demand.
  • Statistical electricity factors include domestic generation and losses; this is not a formal GHG Scope 2 inventory or a recalculated BER certificate.
  • 10 of 703 records lack complete priced end uses and are excluded from the energy estimate.
  • Fewer than 10 complete observations in bands A1, B1; no band-level calibration is claimed.
  • Annual savings use the saved retrofit rollout; additional solar and EV uptake ramp evenly over the same years. Each completed year is treated as a full operating year, with fixed saved prices and carbon factors. Cumulative savings sum annual run rates once.
  • The renewable comparison is additional on-site solar used locally divided by included delivered energy. It excludes unverified existing generation and is not a national renewable-energy share.
  • Annual self-use is an assumption capped by remaining electricity demand, not an hourly generation/load simulation.
  • Retrofit suitability, costs and performance are planning assumptions requiring building-level assessment.
  • Transport is a resident-travel model for the selected age-15-plus population. Mode distances and occupancy are assumptions; Census cars are contextual counts, not the multiplier for these totals.
  • Travel uses the NTA National Household Travel Survey 2023 figures for a dublin city & suburbs area (7.68 km average trip), from the CSO urban/rural classification of the Small Areas. Each mode takes its own trip length from the CSO National Travel Survey 2016 (a car journey 1.15 times the average, a walk a seventh of it), a departure from the SEAI template, which gives every mode the average length and so understates car travel.
  • BER coverage is 57%. BER coverage does not establish sample representativeness; estimates for unrated homes depend on the model assumptions.
  • Business and community energy is benchmarked from floor area, not metered — replace benchmarks with a year of bills where the committee has them.
  • Agriculture has no farm count yet, so it is absent from the totals rather than zero.
  • Every 2030 figure assumes 60% of the plan is delivered.
  • Energy demand and costs are modelled estimates, not household bills. BER certificates describe standardised use; defaults and any local overrides require review.
  • Some records lack complete delivered-energy costs and are excluded from the energy-cost risk calculation.