![Thatcher Ulrich on X: "In graph form, here are the historical gas input, heat pump observations, Mitsubishi ratings and COP lines assuming gas at 72%. The heat pump observations and average seem Thatcher Ulrich on X: "In graph form, here are the historical gas input, heat pump observations, Mitsubishi ratings and COP lines assuming gas at 72%. The heat pump observations and average seem](https://pbs.twimg.com/media/FN3FMzEWUAAxAPC.jpg:large)
Thatcher Ulrich on X: "In graph form, here are the historical gas input, heat pump observations, Mitsubishi ratings and COP lines assuming gas at 72%. The heat pump observations and average seem
![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
![Plot of heat pump COP versus temperature lift assuming a typical Carnot... | Download Scientific Diagram Plot of heat pump COP versus temperature lift assuming a typical Carnot... | Download Scientific Diagram](https://www.researchgate.net/publication/259284556/figure/fig1/AS:669514584834072@1536636124980/Plot-of-heat-pump-COP-versus-temperature-lift-assuming-a-typical-Carnot-factor-of-05.png)
Plot of heat pump COP versus temperature lift assuming a typical Carnot... | Download Scientific Diagram
![Jan Rosenow on X: "1) Here is the detailed analysis showing that with a coefficient of performance (COP) of 3, a heat pump starts to become cheaper to run than a gas Jan Rosenow on X: "1) Here is the detailed analysis showing that with a coefficient of performance (COP) of 3, a heat pump starts to become cheaper to run than a gas](https://pbs.twimg.com/media/FLtqy4vWUAYDpr6.jpg:large)