Heat Pump Readiness Score
Score your property across 10 heat pump readiness factors including insulation, radiators, hot water demand, EPC rating, and grid capacity to see whether your home is ready for a heat pump.
Last updated: April 2026
A heat pump readiness score assesses UK property suitability for an air source or ground source heat pump across 10 factors including insulation, property type, current heating, outdoor space, radiator sizing, budget, and EPC rating. The £7,500 Boiler Upgrade Scheme grant significantly improves economics. Businesses embed this scorecard to capture leads — homeowners reveal property type, EPC rating, and retrofit needs.
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What is Heat Pump Readiness?
Heat Pump Readiness measures how suitable a property is for a heat pump installation across 10 critical factors: insulation level, property type, current heating system, available space, radiator sizing, hot water demand, budget, planning constraints, electrical grid capacity, and EPC rating. A high score indicates the property is ready for a cost-effective installation, while a low score reveals the retrofit work needed first to avoid a cold, expensive, or failed installation.
The Formula
Heat Pump Readiness Score = Sum of 10 category scores (each out of 10) = Score out of 100
Worked Example
A homeowner with a 1960s semi-detached house considers replacing an ageing gas boiler with an air source heat pump.
- Property type: cavity wall semi-detached (score 5/10)
- Insulation: loft insulation present but walls uninsulated, double glazing from early 2000s (score 5/10)
- EPC rating: Band D — the UK average (score 5/10)
- Radiators: original single-panel sized for gas boiler operation (score 3/10)
- Budget: £8,000 of own funds plus £7,500 Boiler Upgrade Scheme grant (score 7/10)
- Total score across 10 categories: 52/100 — below the Energy Saving Trust average of 45 but not ready for cost-effective installation
📌 The property would work with a heat pump but running costs would be higher than expected because of uninsulated walls and undersized radiators. The smart path: spend £3,500-£6,000 on cavity wall insulation, draught-proofing, and radiator upgrades first, raising the EPC to band C and the readiness score to 75+. The heat pump then delivers the SCOP of 3.5-4+ that makes running costs economic, rather than 2.0-2.5 in the uninsulated state — a difference of £400-£800 per year in running costs over the life of the system.
Why This Matters
Avoiding an expensive mistake
Energy Saving Trust research shows heat pumps in poorly insulated or wrongly specified homes can cost 40-60% more to run than gas boilers they replace — turning a climate and cost win into a long-term financial mistake. A readiness check before installation is the cheapest way to avoid this outcome.
Grant eligibility
The Boiler Upgrade Scheme offers £7,500 towards air source and ground source heat pumps, but requires installation by an MCS-certified contractor and a compatible property. A readiness check before applying flags any showstoppers — planning issues, grid capacity, or unsuitable heat loss — before you commit to a quote or lose the grant window.
Running cost savings
In a well-insulated home with correctly sized radiators, a heat pump with SCOP 3.5-4.5 typically delivers running costs equal to or below a gas boiler while cutting carbon emissions by around 70%. Off-gas-grid homes replacing oil, LPG, or electric storage heating typically save £500-£1,500 per year — but only when the property is ready for the technology to perform.
Common Mistakes
❌ Installing without insulating first
The #1 cause of disappointed heat pump owners is jumping to installation before the property is insulated to a reasonable standard. Heat pumps work at lower flow temperatures than gas boilers, so heat loss must be minimised first. Insulation upgrades typically pay for themselves within 2-4 years and make the heat pump itself meaningfully cheaper to run for the next 20.
❌ Undersizing the heat pump
Some installers quote smaller units to hit lower prices, but an undersized heat pump runs constantly at high cost and still cannot meet demand during cold spells. Insist on a proper Whole House Heat Loss Calculation (MCS standard) that matches the unit to peak winter demand, not a rule-of-thumb estimate.
❌ Ignoring radiator upgrades
Existing radiators sized for a gas boiler (60-70°C flow) are typically too small for a heat pump (40-55°C flow). Skipping radiator upgrades to save money results in cold rooms, high running costs, or the heat pump running at higher-than-optimal flow temperatures to compensate — wiping out the efficiency advantage. Budget 15-25% of project cost for emitter upgrades.
Industry Benchmarks
| Category | Good | Average | Poor |
|---|---|---|---|
| New build (post-2010) | Score 80+ — ideal candidate, minimal prep needed | Score 65-79 | Score below 65 |
| Post-2000 modern home | Score 70+ with good insulation | Score 50-69 | Score below 50 |
| Pre-1970 older property | Score 60+ after retrofit work | Score 35-59 | Score below 35 — retrofit first |
Source: Energy Saving Trust
Benchmark data sourced from Energy Saving Trust.
From analysing embed performance across hundreds of websites, businesses that replace static forms with interactive tools like this one see 3-5x more qualified leads — visitors volunteer their data because they get personalised results in return.
One of the most common mistakes we see when working with clients: installing without insulating first. The #1 cause of disappointed heat pump owners is jumping to installation before the property is insulated to a reasonable standard. Heat pumps work at lower flow temperatures than gas boilers, so heat loss must be minimised first. Insulation upgrades typically pay for themselves within 2-4 years and make the heat pump itself meaningfully cheaper to run for the next 20.
Embed This Scorecard on Your Website
Every visitor who uses your embedded scorecard becomes a qualified lead. Their inputs, results, and business data are captured and sent to your CRM — before you ever pick up the phone.
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