He said well-designed systems can operate effectively in the UK, delivering in excess of three units of heat for every unit of electricity used to pump the heat in and around the property.

BBC: Heat pumps 'need tighter regulations'

For every unit of energy to drive the compressor, the pump yields four units of heat.

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The charity aims to fundraise over the summer to improve its seal unit by making the pool bigger and fitting a pump system in case any further rescues are needed.

BBC: Guernsey