Calorific Value

The calorific value (CV) is a measurement of the amount of energy contained in the gas. CV is usually quoted in megajoules per cubic metre (MJ/m3). Gas delivered to your premises will have a CV of between 37.5 MJ/m3 and 43.0 MJ/m3.This is continually measured by the gas transporters for each Local Distribution Zone and passed to your gas supplier daily. It is a legal requirement to to include the CV on invoices.

Capacity Charge

A charge set by the local Distribution Network Operator (DNO), to cover investment, maintenance and repairs to the network. The charge is dependent on the Agreed Capacity of the property, and can also be called the Availability Charge.

Carbon Capture and Storage (CCS)

Carbon Capture and Storage is a three-step process in which CO2 is removed from air before or after the combustion of fossil fuels. Step 1 is capturing CO2 from the emissions produced by power stations; step 2 is transporting the CO2 to storage points, usually by pipeline; and step 3 is storing the carbon safely, often in depleted oil and gas fields.

Carbon Reduction Commitment (CRC)

Introduced by the UK government, the Carbon Reduction Commitment (CRC) is an emissions trading scheme for large corporations that are not eligible for the EU Emissions Trading. The scheme is mandatory, and applies to businesses and organisations including banks, universities, large hospitals, local authorities, central government departments and occasionally large offices.

Carbon Trading

Carbon trading controls carbon emissions by putting a limit on total emissions from certain activities or sectors. This puts a price on carbon and creates a market whereby participants can trade their carbon allowances. Allowances are initially allocated, perhaps through a free distribution or through an auction. The carbon price provides an economic incentive to reduce emissions and allows for any reductions to take place at the lowest cost across the scheme. The limit on total emissions is adjusted periodically.

Citizens Advice Bureau

Citizens Advice consumer service which offers consumer advice and information.

Climate Change Levy (CCL)

CCL is designed to encourage energy savings and the reduction of carbon dioxide emissions. The tax is imposed on all UK businesses and applies to the use of certain fuels and electricity in industry, commerce, agriculture and public administration.

Combined Half Hourly (HH) Data Charge

The cost of collecting and handling data from half hourly (HH) meter readers.

Commodity Charge

A charge levied by National Grid on the quantity of gas transported throughout the network.