Fig. 2: Energy efficiency of individual heat pumps.
From: Estimation of energy efficiency of heat pumps in residential buildings using real operation data
A single vertical bar represents a histogram of median coefficient of performance (COP) values calculated for individual heat pumps within specific temperature ranges and different operating modes. Distributions for all: (a) air-source heat pumps in space heating mode (b) air-source heat pumps in domestic hot water mode (c) ground-source heat pumps in space heating mode (d) ground-source heat pumps in domestic hot water mode. Source data are provided as a Source Data file.
