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Table 5 Standard effective temperature index [36]

From: Influence of grass lawns on the summer thermal environment and microclimate of heritage sites: a case study of Fuling mausoleum, China

Thermal comfort index

Comfortable

Slightly warmer

Slightly hotter

Hot

Very hot

Standard effective temperature (℃)

22.2–25.6

25.6–30

30–34.5

34.5–37.5

 ≥ 37.5