Why are you using these units and what do they mean?
We provide three different measures of the energy used: the amount
of energy, its monetary cost, and the carbon impact of the energy used.
Energy use is measured in kilowatt hours (kWh), which are the standard
‘units’ of a home energy bill (1kWh is the amount of electricity used by
leaving ten 100W light bulbs on for one hour).
For electricity this number
represents the amount of energy that flows into a building through the meter,
while for gas it is the amount of energy that is theoretically available by
burning all the gas. So the two numbers mean very different things - this
is one reason that we try to use 'units per hour' when combining
them. Really it would be better not to combine them at all, because it
can lead to confusion
Monetary cost is calculated using the costs per 'unit' for electricity
and for gas in each building. The figures used are noted below in the
The carbon impact is measured in kg of CO2. We have not taken the
option of reporting carbon emissions in terms of CO2e (the e
stands for equivalent) which takes other climate-affecting gasses into
account besides carbon dioxide. We are considering reporting in terms of
CO2e, let us know if you think that's a good idea. Incidentally,
for Government buildings, reporting as CO2 rather than
CO2e is consistent with the formal reporting requirements on the
departments occupying them.
How much does this organisation pay for its energy?
Prices come from the latest energy bills for the Cabinet Office, which are
noted below in the Assumptions section. These are of course subject to
change, and will be updated by the organisations themselves as tariffs are
Can you show data from the transport emissions of this organisation/ building?
Data of CO2 emissions created by transport used by organisations is very
interesting and powerful data to show here. We are working on ways to display
and reduce the transport impacts of different organisations, and you will see
some of the products of this work on these pages very soon.