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  • Why have we built a running cost calculator for air source heat pumps?
    We know that the heat pump market can be difficult to understand and navigate. We’re trying to simplify it and bring you tools and content that mean you don’t have to search the whole internet and be an Excel wizard to find out if a heat pump is right for you.
  • How are the running costs calculated?
    We use your gas and electricity consumption and the Typical Domestic Consumption Values (TCDVs) October 2023 price cap (available at www.ofgem.gov.uk) to estimate your current gas and electricity costs. If you don't know your consumption we estimate it by asking how many bedrooms you have and then assigning a low, medium or high TCDV. We use the age of your gas boiler to estimate how efficient it is. We compare your current running costs to the potential costs of heating your home and hot water with an air source heat pump. Finally we calculate the additional savings which could be gained if you had your gas meter removed. For information the October 2023 price cap values are: Gas unit rate: 6.89p / kWh Gas standing charge: 29.62p / day Electricity unit rate: 27.35p / kWh Electricity standing charge: 53.37p / day
  • What is a SCOP and how is it used in the running cost calculator?
    SCOP stands for Seasonal Coefficient Of Performance. It a measurement of how efficient a heat pump is as an average across the seasons. We use a SCOP of 3.5 in our calculator but some heat pumps can be even more efficient than this.
  • The running costs are more than I expected. Why?
    Heat pumps are a lot more efficient than gas boilers. In some cases 400% efficient or more. So they use a lot less energy to provide the same heat output. However the price of electricity (as of October 2023) is around 3 - 4 times more expensive than gas. There are further savings to be made if you remove your gas meter and save on the gas standing charge.
  • How accurate are these running costs?
    All homes are different, with different insulation, energy efficiency and energy usage profiles. So the running cost calculations we provide will not be 100% accurate for your home. They are indicative only and aimed at helping you decide whether a heat pump is right for you. What you can be sure of is that, provided your electricity supply uses renewable sources, switching to an air source heat pump will be far more environmentally friendly than a gas boiler.

Get a heat pump quote

Answer some simple questions and get a detailed quote for a new air source heat pump, installed by our expert engineers.

Book a Home Health Check

We’ll visit your home and perform a detailed energy efficiency assessment - providing useful solutions for saving on your energy bills.

Learn about heat pumps

Heat pumps are an amazing sustainable technology. Explore what they are, how they work and whether a heat pump is right for your home.

What would you like to do now?

Get a heat pump quote

Answer some simple questions and get a detailed quote for a new air source heat pump, installed by our expert engineers.

Book a Home Health Check

We’ll visit your home and perform a detailed energy efficiency assessment - providing useful solutions for saving on your energy bills.

Learn about heat pumps

Heat pumps are an amazing sustainable technology. Explore what they are, how they work and whether a heat pump is right for your home.

What would you like to do now?

Legal information

The purpose of the air source heat pump running cost calculator tool is to provide a running cost estimate to help customers decide whether an air source heat pump is right for them. The tool provides estimates only and British Gas makes no claim or assertion that they are accurate. Each customer’s property is different and the estimates are indicative only. The tool and the estimates it produces do not constitute an offer, nor a guarantee of costs. The tool is based on data available as of October 2023. Our aim is to update the tool to reflect the latest data however, as energy prices and other data points can change, British Gas makes no guarantee that at the time of use the tool will be based on the very latest data available.

How much does an air source heat pump cost to run?

Answer a few simple questions and find out

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