Inputs
Results
HP electricity
—
kWh/yr
HP annual cost
—
currency/yr
Gas use
—
kWh/yr
Gas annual cost
—
currency/yr
Annual saving
—
currency/yr
Simple payback
—
years
| System | Energy used | Annual cost |
|---|
Note: SCOP is seasonal and climate-dependent — actual performance varies with outside temperature, flow temperature and system design.
Why this matters
A heat pump's running cost depends almost entirely on its SCOP and your electricity tariff relative to gas — even a small SCOP difference shifts payback by years. Getting like-for-like quotes from multiple installers and checking real-world COP performance in your climate can swing your decision from "not worth it" to "clear win." Use TUNA to compare heat pump installers near you with verified SCOP claims and pricing.