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Methodology

Last reviewed:

This page explains how UKHeatPumpQuotes sources, reviews, and updates the data on our site. We publish it because anyone making a four- or five-figure home improvement decision deserves to know where the numbers came from.

Data sources

Statistical claims on this site are derived from one or more of the following authoritative sources, cited inline where used:

  • GOV.UK — Boiler Upgrade Scheme — Official BUS grant scheme rules and eligibility (Ofgem-administered).
  • MCS Certified Installer Database — The official MCS register of approved installers — verifies any installer's certification.
  • Energy Saving Trust — Independent UK home-energy charity. Field-trial data on UK heat-pump performance and SCOP figures.
  • Ofgem — UK energy regulator. Administers the BUS scheme and publishes installation statistics.

Cost-data sourcing (where applicable)

Where we publish installed-cost ranges (e.g. "a typical UK semi-detached costs £9,500–£13,500 before grant"), the ranges are aggregated from publicly-available UK installer pricing, MCS-certified installer published quote ranges, Energy Saving Trust and Nesta published cost benchmarks, and Ofgem BUS voucher claim values. We do not collect, store, or use personal pricing information from individual homeowners in our cost-band calculations.

  • Aggregation pool: Pricing reference points compiled from 400+ publicly-published UK installer quote ranges and BUS voucher claim averages reported by Ofgem, covering England, Scotland and Wales.
  • Privacy: No personally-identifiable pricing data is collected from individual homeowners for our cost ranges. Lead-form submissions are kept entirely separate from cost-band publication.
  • Outlier handling: The lowest 5% and highest 5% of price points are excluded — these are typically misquotes, bundled deals with unusual scope, or extreme retrofit cases.
  • Refresh cadence: Cost ranges are recalculated quarterly. The published date at the top of cost-data pages reflects the most recent refresh.
  • Status: All cost ranges published on this site are indicative estimates for journalistic and educational reference. Actual installer quotes vary by property, location, and installer; individual homeowners should obtain at least three formal MCS-certified quotes before commissioning an installation.

References & definitions

Plain-English definitions for the data attributions used throughout this site:

  • “Q1 2026 dataset of 420+ installer quotes” / “Q2 2026 dataset of 480+ quotes”: These refer to our quarterly aggregation of publicly-available UK installer pricing reference points described under “Cost-data sourcing” above. The quote count reflects the size of the public pricing pool aggregated for that quarter, not a private homeowner-collected dataset.
  • “Energy Saving Trust 2024 UK heat pump trial of 750 homes” / “EST 2024 trial (n≈750)”: These references describe the UK government's Electrification of Heat Demonstration Project (delivered 2020–2024 by the Department for Energy Security and Net Zero, with Energy Saving Trust as a delivery partner). The project monitored approximately 742 UK heat pump installations. Final report published at gov.uk.
  • “UK average installed cost £11,200”: An indicative national average derived from the public aggregation pool described above and cross-referenced against Energy Saving Trust and Nesta published benchmarks. Not an Ofgem-attributed figure.
  • “Annual savings figures” (e.g. “saves £300/year”): Calculated from Ofgem 2026 electricity and gas price-cap figures, modelled at typical UK heat-loss for a 3-bed semi (12,000–13,500 kWh/year heat demand), assuming a SCOP of 3.0 on a heat-pump-friendly tariff (e.g. Octopus Cosy). Actual savings vary by tariff, property fabric, and SCOP achieved.
  • BUS voucher counts: 2022–2024 figures are Ofgem-published actuals. 2025 and 2026 voucher counts published on this site are estimates and projections — see the dedicated BUS uptake page for full caveats.
  • Local-authority programme references:Where we name council-level supplementary funding programmes, we recommend readers verify current eligibility directly with their local authority — programme names, scope, and amounts change with each council's annual funding cycle.

Technical review

Pages that include sizing, install-process, or running-cost claims are reviewed by an MCS-qualified UK heat-pump installer before publication. The reviewer checks:

  • kW-sizing ranges per property type are consistent with current MCS heat-loss survey practice.
  • Install timeline ranges reflect a representative UK install, not best-case or worst-case outliers.
  • Quoted SCOP figures (heat-pump efficiency) match the manufacturer-published values for representative current-model units (Daikin Altherma, Vaillant aroTHERM, Mitsubishi Ecodan, Samsung EHS).
  • Grant eligibility criteria match the most-recent published BUS scheme rules at gov.uk.

Updates and corrections

Material changes to BUS grant rules, MCS standards, or significant Ofgem-published data trigger a full review of affected pages within 14 days. See our Editorial Policy for the corrections process and how to flag an error.

What we don't do

  • We do not publish manufacturer-supplied marketing figures (SCOPs measured under unrealistic test conditions, "up to 80% bill saving" claims, etc.).
  • We do not accept payment to adjust published cost ranges, installer rankings, or comparison verdicts.
  • We do not republish AI-generated content as our own. Where we use AI-assisted research or drafting, the output is reviewed and edited by a human before publication.

Spotted an error?

Email [email protected] with the page URL and the issue. We acknowledge within 2 working days and publish a correction (with a dated note) within 14 days for material errors.