For owners
Running-cost calculator
Work out roughly what a unit costs to run — per hour, per day and across a season — from its output, its SEER or SCOP efficiency and your own electricity rate.
Running cost
Estimate what a unit costs to run from its output and efficiency.
Mode
kW
SEER
£
h
days
%
Enter an output and efficiency to see the running cost.
Assumes the unit runs at the output you enter; in practice an inverter modulates, so real cost is usually lower — treat this as a guide. Set your own unit rate from your bill.