Worked example
At a COP of 3.2, each kWh of electricity can provide about 3.2 kWh of useful heat, while a 90% efficient boiler needs more than 1 kWh of gas input for each useful kWh delivered.
Frequently asked questions
Why is COP so important?
A small change in seasonal COP can materially change annual electricity use.
Does this include standing charges?
No. If removing gas entirely removes a gas standing charge, consider that separately.