According to the law of conservation of energy, generating heat with 1 kW·h of electricity cannot possibly exceed 1 kW·h, but if ground-source heat pump technology is used, it can bring about 4 kW·h of heat or cold with 1 kW·h of electricity.
At first glance, this seems almost magical, like some pseudoscience trickery, but in fact, this is a tangible technology, and devices that achieve this level of efficiency are ubiquitous in our lives, with air conditioners being the most representative.
In thermodynamics, the ratio of energy conversion efficiency is called the coefficient of performance (COP).
Among these, electric heaters, or directly electrically heating devices, have the lowest efficiency, roughly only about 60%, meaning they consume 1 kW·h of electrical energy to produce 0.6 kW·h of heat.
