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I have these points on Energy performance and I want to create a heatmap in QGIS following the same logic in the colour scheme.

Energy performance points

key

I would like to create a heatmap ideally a vector or raster based on these values, like the example below.

heatmap

I know there is a plugin in QGIS but which steps do I need to take so that my raster has the same values as my points?

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Heatmaps from point-layers can be easily done in layer-styling: select heatmap as layer rendering style enter image description here

Optionally define a field from the attributes for weighting (highlighted on the screenshot below). Select of define an appropriate color-ramp and set the color of the leftermost marker to transparent (otherwise, you will have no "white" space around your points or point-clusters). Change values for radius and max-value to adapt the picture and set the rendering quality to "best" when done. enter image description here

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  • I have used this but it doesn't allow you to colour the heatmap based on the exact values you want, you can just control the field that has the weights
    – George
    Apr 29 '20 at 9:20
  • You can try to use Heatmap (Kernel Density Estimation): go to the toolbox and filter for Heatmap. With this, you create a raster output (grayscale) where you can use all the styling (single channel pseudo-color): there, you have better options to control the relationship between color and values. Does that help?
    – Babel
    Apr 29 '20 at 20:59

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