Carbon Emissions Calculator for GSHP Heating

The current carbon emissions from different heating systems are shown below in a small program that updates to the current grid carbon intensity every half hour.

The carbon emissions of heating based on heat transfer are dramatically lower than any heating system based on combustion of carbon compounds.

CO2 Emissions from GSHPs

The Carbon Emissions Calculator uses current grid carbon intensity, updated every half hour, to illustrate how much lower carbon emissions are now from ground source energy than from burning fossil fuels for other heating systems.

The CO2 issued by a heat pump powered from green electricity is, of course, zero.

This CO2 Emissions Calculator shows the CO2 issued off-site if a ground source heat pump uses grid electricity to transfer heat from the ground.

As the UK National Grid is decarbonising rapidly, the carbon emissions from a heat pump using grid electricity falls each year.

Outdated Building Regulations distort CO2 Emissions from heat pumps

The grid carbon factor that is required to be used by Part L of the Building Regulations is 519 gCO2/kWh. This severely overestimates the carbon emissions of a heat pump using grid electricity.

Grid Carbon Intensity

Using DEFRA data, the carbon factor of grid electricity was 495 gCO2/kWh generated in 2014.

Grid Carbon Emissions Intensity

In 2015, the equivalent figure was 462, which represents a fall of over 6.5%.

In 2016, the figure was 412, a fall of 10.8%.

For 2017 the Grid Carbon Factor fell to 212 gCO2e/kWh, according to the Energy and Emissions Projections published by BEIS in January 2018. The BEIS report includes the following graph of its projections of the Grid Carbon Factor in all years up to 2035, together with its projections as they had stood one year earlier (shown in the dotted blue line).