electricity
![](https://i0.wp.com/media.wired.com/photos/667de333ddad77ab06240e9a/191:100/w_1280,c_limit/_HeatPump_16121821.jpg?w=1280&resize=1280,670&ssl=1)
The Hunt for the Most Efficient Heat Pump in the World
Albert Wagner
There are different kinds of heat pumps that are in principle even more efficient than air-source devices. Instead of absorbing ...
There are different kinds of heat pumps that are in principle even more efficient than air-source devices. Instead of absorbing ...