In Britain’s battle to cut carbon emissions, the government sees heat pumps as a key weapon. Unveiling the latest energy efficiency plan in March, energy secretary Grant Shapps doubled down on Boris Johnson’s offer of a £5,000 grant for anyone willing to install one. These smart bits of home technology work by transferring thermal energy from the air, ground or water. They
Ruth Bloomfield
The inconvenient truth about heat pumps
They're expensive and impractical – so why is the government obsessed with them?

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