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Carbon credit
A carbon credit can be used for trading in the carbon market. One carbon credit consists of one ton of CO2 (or sometimes CO2 equivalent gases).
Carbon offsetting
When you pay someone else to remove the GHGs you emitted into the atmosphere, it’s called carbon offsetting.
Cast iron
Cast iron is an alloy of iron, silicon and carbon.
Cavitation
Cavitation occurs when the pressure of a liquid at a constant temperature falls below its saturated vapour pressure point (or boiling point).
CE marking
The CE mark is the manufacturer’s/importer’s proof that their product meets the requirements stated in the relevant EU Directives and EN standards.
CFC (Chlorofluorocarbon)
CFC and HCFC refrigerants are detrimental to the breakdown of the ozone layer and the greenhouse effect. CFC is an abbreviation of chlorofluorocarbon; HCFC is an abbreviation of Hydrochlorofluorocarbon. They describe the molecules’ atom content.
Central heating
The term central heating covers hydronic heating systems with a central boiler or furnace either inside the building being heated or in the immediate vicinity.
Channel impeller
A channel impeller works directly on the pumped liquid with the liquid passing through the impeller itself. A channel impeller can be described as a closed, semi-open or open impeller.
Charge exchanger
A charge exchanger combines the advantages of both a traditional domestic hot water exchanger and a hot-water vessel
Chilled room
A chilled room is a refrigerated area for cold storage of perishable items, especially food, to preserve them. In a chilled room the temperature is typically between 0 - 5°C.