*3.1. Heat Exposure across Dwelling Variants*

The average living room temperatures across a range of dwelling variants when *Tmax*,*out*,*<sup>d</sup>* exceeds 23 ◦C during the 2030s summer can be seen in Figure 1. Certain dwelling variants are hotter than others, including mid-terraced dwellings and flats. Multiple distributions are provided for flats to represent the different floor levels of the flats within the buildings. Buildings with higher indoor temperatures were also found to exceed the 23 ◦C temperature threshold more regularly during hot weather, with the coolest dwellings exceeding it 39 times and the hottest exceeding it 101 times during the 123 days of summer, 2030s (median 69 days). The sample size for each dwelling variant within the EHS is also shown.

**Figure 1.** Density plots of the average indoor temperature when *Tmax*,*out*,*<sup>d</sup>* exceeds 23 ◦C during the 2030 summer. The red vertical line shows the median for the stock. There is a lack of data for ground-floor high-rise flats, and so these are not shown. English Housing Survey (EHS).
