Fig. 2: Sensitivity analysis of optimal transition temperature for thermo-responsive (TR) windows.

a–c Tolerance range of transition temperature (\({T}_{{{\rm {tran}}}}\)) as the energy saving requirement is relaxed when TR material is applied on exterior and interior surfaces in hot (a), mixed (b), and cold (c) climates, respectively. d–f Three-dimensional bar chart of optimal transition temperature (opt \({T}_{{{\rm {tran}}}}\)) as the function of clear- and dark-state solar transmittance of TR windows in hot (d), mixed (e), and cold (f) climates, respectively. Source data are provided as a Source Data file.