Energy prices, grant rules, and installation costs change frequently. The figures on this page are estimates for planning only. Always check current supplier rates, installer quotes, and official government grant rules before making decisions.
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How the calculation works
The calculator compares your current annual heating cost with estimated heat pump electricity use. Current system input energy is annual heat demand divided by current system efficiency. Heat pump electricity use is annual heat demand divided by SCOP.
Ireland-specific inputs to check carefully include electricity price, current oil, gas, LPG, or electric heating cost, and any grant amount you expect to qualify for.
Example Ireland calculation
If a home needs 14,000 kWh of heat and a heat pump achieves SCOP 3.2, estimated heating electricity use is about 4,375 kWh. At 30 cent per kWh, that is about EUR1,313 per year before standing charges.
If the existing oil system costs more per useful kWh, the heat pump may show savings. If electricity is expensive or SCOP is weak, the saving may be small or negative.
Ireland assumptions
Currency: EUR. Electricity: Check current official sources. Gas: Check current official sources. Heating oil: Check current official sources.
Last reviewed: 2026-04-27. Confidence: medium. Use supplier bills for current electricity, gas, or oil prices before relying on calculator outputs.
Current annual heating cost
€0
Estimated heat pump electricity use
4,375 kWh
Estimated heat pump annual cost
€0
Annual savings
€0
Net installation cost after grants
€12,000
Estimated payback period
No simple payback
CO2 reduction estimate
2,067 kg/year
Recommendation summary
This estimate suggests limited or negative savings. Improving insulation, emitters, or tariff choice may be important before moving ahead.
Calculators on this site are estimates only. Always get a professional heat loss survey and verify current grant rules, tariffs, and product suitability before making purchase decisions.
Heat pump savings FAQs
No. These figures are estimates based on the assumptions you enter. Real-world results depend on design, controls, insulation, weather, and how the system is used.