Figure 3
The upper portion displays multiple parallel coordinate plots, where each line represents a distinct retrofit scenario or a combination of energy-saving measures. These lines demonstrate the impacts of different scenarios on key metrics such as energy savings, peak heating demand, and reduction in operational C O 2 emissions. Below, a 3 D model of the building is shown, highlighting areas of solar radiation exposure. To the right, a grid of 16 circular icons, each depicting a house, represents the optimized design solutions generated. A legend at the bottom left lists multiple attributes, including walls, roof, floor windows, H V A C, energy saving potential, C O 2 emissions, C O 2 savings, payback investment, and net investment. On the bottom is a table with 25 columns and 5 rows. Row 1 presents the column headings, representing the attributes.Visualisation of the different energy retrofit scenarios for an example heritage building of 23 residential units. Each line represents one scenario, or combination of measures, with impacts on energy savings, peak heating demand or reduction in operation CO2 emissions (Dang, 2024)