![A heat pump is used to maintain a house at 25 ? C by extracting heat from the outside air on a day when the outside air temperature is 4 ? C. A heat pump is used to maintain a house at 25 ? C by extracting heat from the outside air on a day when the outside air temperature is 4 ? C.](https://homework.study.com/cimages/multimages/16/untitled_diagram_882683660457374801493881344505379555053.png)
A heat pump is used to maintain a house at 25 ? C by extracting heat from the outside air on a day when the outside air temperature is 4 ? C.
![The heat demand and heat pump power depending on the outside temperature. | Download Scientific Diagram The heat demand and heat pump power depending on the outside temperature. | Download Scientific Diagram](https://www.researchgate.net/publication/326152199/figure/fig1/AS:644289675681802@1530622037539/The-heat-demand-and-heat-pump-power-depending-on-the-outside-temperature.png)
The heat demand and heat pump power depending on the outside temperature. | Download Scientific Diagram
![Heat pump coefficient of performance (COP) as a function of ambient... | Download Scientific Diagram Heat pump coefficient of performance (COP) as a function of ambient... | Download Scientific Diagram](https://www.researchgate.net/publication/273458507/figure/fig1/AS:391758975389720@1470414026334/Heat-pump-coefficient-of-performance-COP-as-a-function-of-ambient-outdoor-temperature.png)
Heat pump coefficient of performance (COP) as a function of ambient... | Download Scientific Diagram
![Variation of COP with outdoor temperature for one particular heat pump. | Download Scientific Diagram Variation of COP with outdoor temperature for one particular heat pump. | Download Scientific Diagram](https://www.researchgate.net/publication/330717027/figure/fig1/AS:720540507574272@1548801652509/Variation-of-COP-with-outdoor-temperature-for-one-particular-heat-pump.png)